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Html and Javascript: How to return user input


How do JavaScript closures work?How do I remove a property from a JavaScript object?How do I check if an array includes an object in JavaScript?How do I redirect to another webpage?How do I include a JavaScript file in another JavaScript file?What does “use strict” do in JavaScript, and what is the reasoning behind it?How to check whether a string contains a substring in JavaScript?How do I remove a particular element from an array in JavaScript?Why does HTML think “chucknorris” is a color?How to use foreach with array in JavaScript?






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0















I have 3 functions that, when the user enters their first and last name in the message box, it returns (a)Their name merged in array form and (b)Their names merged as well but in an array of objects.
My problem is that when I test it in Google Chrome, nothing shows up when I press the Save button, but in JSbin it just returns:



[object Object]


This is the functions code (useMerge.js):



var first_name = [];
var last_name = [];

var fInput = document.getElementById("fname");
var lInput = document.getElementById("lname");
var messageBox = document.getElementById("display");

function insert ( )
first_name.push( fInput.value );
last_name.push( lInput.value );

Show();


function Show ()
//clear messagebox
fInput.value = "";
lInput.value = "";

//show
messageBox.innerHTML = "";

messageBox.innerHTML = mergeHandler(first_name,last_name,merge2Single);
messageBox.innerHTML = mergeHandler(first_name,last_name,merge2Object);


//merges
function merge2Single(first, last)
var arr=[];
arr.push(first);
arr.push(last);
return arr.join(" ");


function mergeHandler(arr1, arr2, func)
var i=0;
var size = arr1.length;
var result=[];
for(i=0; i<size; i++)
result.push(func(arr1[i], arr2[i]));

return result;


function merge2Object(first_name, last_name)
var arr=[];
arr.push(FirstName: first_name,
LastName: last_name);

return arr;



Html code:



<!DOCTYPE html>
<html>
<head>
<script src="useMerge.js" type="text/javascript"></script>
<meta charset=utf-8 />
<title>UI</title>

<style>
article, aside, figure, footer, header, hgroup,
menu, nav, section
display: block;

</style>
</head>
<body>
<form>
<h1>Please enter data</h1>
<input id="fname" type="text" placeholder="First Name" />
<input id="lname" type="text" placeholder="Last Name" />
<input type="button" value="Save" onclick="insert()" />
</form>
<div id="display"></div>
</body>
</html>









share|improve this question



















  • 1





    add the defer attribute to your script tag for useMerge.js

    – Randy Casburn
    Mar 9 at 4:04

















0















I have 3 functions that, when the user enters their first and last name in the message box, it returns (a)Their name merged in array form and (b)Their names merged as well but in an array of objects.
My problem is that when I test it in Google Chrome, nothing shows up when I press the Save button, but in JSbin it just returns:



[object Object]


This is the functions code (useMerge.js):



var first_name = [];
var last_name = [];

var fInput = document.getElementById("fname");
var lInput = document.getElementById("lname");
var messageBox = document.getElementById("display");

function insert ( )
first_name.push( fInput.value );
last_name.push( lInput.value );

Show();


function Show ()
//clear messagebox
fInput.value = "";
lInput.value = "";

//show
messageBox.innerHTML = "";

messageBox.innerHTML = mergeHandler(first_name,last_name,merge2Single);
messageBox.innerHTML = mergeHandler(first_name,last_name,merge2Object);


//merges
function merge2Single(first, last)
var arr=[];
arr.push(first);
arr.push(last);
return arr.join(" ");


function mergeHandler(arr1, arr2, func)
var i=0;
var size = arr1.length;
var result=[];
for(i=0; i<size; i++)
result.push(func(arr1[i], arr2[i]));

return result;


function merge2Object(first_name, last_name)
var arr=[];
arr.push(FirstName: first_name,
LastName: last_name);

return arr;



Html code:



<!DOCTYPE html>
<html>
<head>
<script src="useMerge.js" type="text/javascript"></script>
<meta charset=utf-8 />
<title>UI</title>

<style>
article, aside, figure, footer, header, hgroup,
menu, nav, section
display: block;

</style>
</head>
<body>
<form>
<h1>Please enter data</h1>
<input id="fname" type="text" placeholder="First Name" />
<input id="lname" type="text" placeholder="Last Name" />
<input type="button" value="Save" onclick="insert()" />
</form>
<div id="display"></div>
</body>
</html>









share|improve this question



















  • 1





    add the defer attribute to your script tag for useMerge.js

    – Randy Casburn
    Mar 9 at 4:04













0












0








0








I have 3 functions that, when the user enters their first and last name in the message box, it returns (a)Their name merged in array form and (b)Their names merged as well but in an array of objects.
My problem is that when I test it in Google Chrome, nothing shows up when I press the Save button, but in JSbin it just returns:



[object Object]


This is the functions code (useMerge.js):



var first_name = [];
var last_name = [];

var fInput = document.getElementById("fname");
var lInput = document.getElementById("lname");
var messageBox = document.getElementById("display");

function insert ( )
first_name.push( fInput.value );
last_name.push( lInput.value );

Show();


function Show ()
//clear messagebox
fInput.value = "";
lInput.value = "";

//show
messageBox.innerHTML = "";

messageBox.innerHTML = mergeHandler(first_name,last_name,merge2Single);
messageBox.innerHTML = mergeHandler(first_name,last_name,merge2Object);


//merges
function merge2Single(first, last)
var arr=[];
arr.push(first);
arr.push(last);
return arr.join(" ");


function mergeHandler(arr1, arr2, func)
var i=0;
var size = arr1.length;
var result=[];
for(i=0; i<size; i++)
result.push(func(arr1[i], arr2[i]));

return result;


function merge2Object(first_name, last_name)
var arr=[];
arr.push(FirstName: first_name,
LastName: last_name);

return arr;



Html code:



<!DOCTYPE html>
<html>
<head>
<script src="useMerge.js" type="text/javascript"></script>
<meta charset=utf-8 />
<title>UI</title>

<style>
article, aside, figure, footer, header, hgroup,
menu, nav, section
display: block;

</style>
</head>
<body>
<form>
<h1>Please enter data</h1>
<input id="fname" type="text" placeholder="First Name" />
<input id="lname" type="text" placeholder="Last Name" />
<input type="button" value="Save" onclick="insert()" />
</form>
<div id="display"></div>
</body>
</html>









share|improve this question
















I have 3 functions that, when the user enters their first and last name in the message box, it returns (a)Their name merged in array form and (b)Their names merged as well but in an array of objects.
My problem is that when I test it in Google Chrome, nothing shows up when I press the Save button, but in JSbin it just returns:



[object Object]


This is the functions code (useMerge.js):



var first_name = [];
var last_name = [];

var fInput = document.getElementById("fname");
var lInput = document.getElementById("lname");
var messageBox = document.getElementById("display");

function insert ( )
first_name.push( fInput.value );
last_name.push( lInput.value );

Show();


function Show ()
//clear messagebox
fInput.value = "";
lInput.value = "";

//show
messageBox.innerHTML = "";

messageBox.innerHTML = mergeHandler(first_name,last_name,merge2Single);
messageBox.innerHTML = mergeHandler(first_name,last_name,merge2Object);


//merges
function merge2Single(first, last)
var arr=[];
arr.push(first);
arr.push(last);
return arr.join(" ");


function mergeHandler(arr1, arr2, func)
var i=0;
var size = arr1.length;
var result=[];
for(i=0; i<size; i++)
result.push(func(arr1[i], arr2[i]));

return result;


function merge2Object(first_name, last_name)
var arr=[];
arr.push(FirstName: first_name,
LastName: last_name);

return arr;



Html code:



<!DOCTYPE html>
<html>
<head>
<script src="useMerge.js" type="text/javascript"></script>
<meta charset=utf-8 />
<title>UI</title>

<style>
article, aside, figure, footer, header, hgroup,
menu, nav, section
display: block;

</style>
</head>
<body>
<form>
<h1>Please enter data</h1>
<input id="fname" type="text" placeholder="First Name" />
<input id="lname" type="text" placeholder="Last Name" />
<input type="button" value="Save" onclick="insert()" />
</form>
<div id="display"></div>
</body>
</html>






javascript html arrays json






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Mar 9 at 4:05







B.Uriah

















asked Mar 9 at 4:00









B.UriahB.Uriah

174




174







  • 1





    add the defer attribute to your script tag for useMerge.js

    – Randy Casburn
    Mar 9 at 4:04












  • 1





    add the defer attribute to your script tag for useMerge.js

    – Randy Casburn
    Mar 9 at 4:04







1




1





add the defer attribute to your script tag for useMerge.js

– Randy Casburn
Mar 9 at 4:04





add the defer attribute to your script tag for useMerge.js

– Randy Casburn
Mar 9 at 4:04












4 Answers
4






active

oldest

votes


















0














You are putting an object in display. Use JSON.stringify(your_obj), this will convert your object into string.






share|improve this answer






























    1














    You should read the textbox after the user submit the button inside the function as shown below :



    var first_name = [];
    var last_name = [];

    var fInput;
    var lInput;
    var messageBox;

    function insert ( )
    fInput = document.getElementById("fname");
    lInput = document.getElementById("lname");
    messageBox = document.getElementById("display");
    first_name.push( fInput.value );
    last_name.push( lInput.value );

    Show();


    function Show ()
    //clear messagebox
    fInput.value = "";
    lInput.value = "";

    //show
    messageBox.innerHTML = "";
    messageBox.innerHTML = mergeHandler(first_name,last_name,merge2Single);
    messageBox.innerHTML = mergeHandler(first_name,last_name,merge2Object);


    //merges
    function merge2Single(first, last)
    var arr=[];
    arr.push(first);
    arr.push(last);
    return arr.join(" ");


    function mergeHandler(arr1, arr2, func)
    var i=0;
    var size = arr1.length;
    var result=[];
    for(i=0; i<size; i++)
    result.push(func(arr1[i], arr2[i]));

    return result;


    function merge2Object(first_name, last_name)
    var arr=[];
    arr.push(FirstName: first_name,
    LastName: last_name);

    return arr;



    After this fix, you get the following result:



    [object Object]





    share|improve this answer






























      0














      Primarily I can see two issue in your code




      1. You are loading the script before dom is ready so



        var fInput = document.getElementById("fname");
        var lInput = document.getElementById("lname");
        var messageBox = document.getElementById("display");



        js will not able to find these elements from the dom



        To solve this issue load js near closing end of body



        <body>
        // rest of html
        <script src="useMerge.js" type="text/javascript"></script>
        </body>



      2. If you want to join the first name and last number array , just concat those two arrays and then use join





      var first_name = [];
      var last_name = [];

      var messageBox = document.getElementById("display");
      var messageBox2 = document.getElementById("display2");

      function insert()
      var fInput = document.getElementById("fname");
      var lInput = document.getElementById("lname");
      first_name.push(fInput.value);
      last_name.push(lInput.value);

      Show();


      function Show()
      //clear messagebox
      fInput.value = "";
      lInput.value = "";

      //show
      messageBox.innerHTML = "";
      messageBox2.innerHTML = "";

      messageBox.innerHTML = mergeHandler(first_name, last_name, merge2Single);
      messageBox2.innerHTML = JSON.stringify(mergeHandler(first_name, last_name, merge2Object));


      //merges
      function merge2Single(first, last)
      return first_name.concat(last_name).join(' ');


      function mergeHandler(arr1, arr2, func)
      return func(arr1, arr2);


      function merge2Object(first_name, last_name)
      var arr = [];
      arr.push(
      FirstName: first_name,
      LastName: last_name
      );

      return arr;

      article,
      aside,
      figure,
      footer,
      header,
      hgroup,
      menu,
      nav,
      section
      display: block;

      <form>
      <h1>Please enter data</h1>
      <input id="fname" type="text" placeholder="First Name" />
      <input id="lname" type="text" placeholder="Last Name" />
      <input type="button" value="Save" onclick="insert()" />
      </form>
      <div id="display"></div>
      <div id="display2"></div>








      share|improve this answer






























        0














        Try this in this function. Just map the object and joint the strings. By the way, you are overriding the results of your functions by trying to display the text in the same div



        Finally use the attribute defer in your <script> tag. Right now your javascript in the browser is running before your html is loaded. Just do this:



        <script src="script.js" type="text/javascript" defer></script>



        function merge2Object(first_name, last_name)
        var arr=[];
        arr.push(FirstName: first_name,
        LastName: last_name);

        console.log(arr);
        return arr.map(e => `$e.FirstName $e.LastName`).join(",");






        share|improve this answer























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          4 Answers
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          4 Answers
          4






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes









          0














          You are putting an object in display. Use JSON.stringify(your_obj), this will convert your object into string.






          share|improve this answer



























            0














            You are putting an object in display. Use JSON.stringify(your_obj), this will convert your object into string.






            share|improve this answer

























              0












              0








              0







              You are putting an object in display. Use JSON.stringify(your_obj), this will convert your object into string.






              share|improve this answer













              You are putting an object in display. Use JSON.stringify(your_obj), this will convert your object into string.







              share|improve this answer












              share|improve this answer



              share|improve this answer










              answered Mar 9 at 4:06









              Arnold PargeArnold Parge

              1,81611319




              1,81611319























                  1














                  You should read the textbox after the user submit the button inside the function as shown below :



                  var first_name = [];
                  var last_name = [];

                  var fInput;
                  var lInput;
                  var messageBox;

                  function insert ( )
                  fInput = document.getElementById("fname");
                  lInput = document.getElementById("lname");
                  messageBox = document.getElementById("display");
                  first_name.push( fInput.value );
                  last_name.push( lInput.value );

                  Show();


                  function Show ()
                  //clear messagebox
                  fInput.value = "";
                  lInput.value = "";

                  //show
                  messageBox.innerHTML = "";
                  messageBox.innerHTML = mergeHandler(first_name,last_name,merge2Single);
                  messageBox.innerHTML = mergeHandler(first_name,last_name,merge2Object);


                  //merges
                  function merge2Single(first, last)
                  var arr=[];
                  arr.push(first);
                  arr.push(last);
                  return arr.join(" ");


                  function mergeHandler(arr1, arr2, func)
                  var i=0;
                  var size = arr1.length;
                  var result=[];
                  for(i=0; i<size; i++)
                  result.push(func(arr1[i], arr2[i]));

                  return result;


                  function merge2Object(first_name, last_name)
                  var arr=[];
                  arr.push(FirstName: first_name,
                  LastName: last_name);

                  return arr;



                  After this fix, you get the following result:



                  [object Object]





                  share|improve this answer



























                    1














                    You should read the textbox after the user submit the button inside the function as shown below :



                    var first_name = [];
                    var last_name = [];

                    var fInput;
                    var lInput;
                    var messageBox;

                    function insert ( )
                    fInput = document.getElementById("fname");
                    lInput = document.getElementById("lname");
                    messageBox = document.getElementById("display");
                    first_name.push( fInput.value );
                    last_name.push( lInput.value );

                    Show();


                    function Show ()
                    //clear messagebox
                    fInput.value = "";
                    lInput.value = "";

                    //show
                    messageBox.innerHTML = "";
                    messageBox.innerHTML = mergeHandler(first_name,last_name,merge2Single);
                    messageBox.innerHTML = mergeHandler(first_name,last_name,merge2Object);


                    //merges
                    function merge2Single(first, last)
                    var arr=[];
                    arr.push(first);
                    arr.push(last);
                    return arr.join(" ");


                    function mergeHandler(arr1, arr2, func)
                    var i=0;
                    var size = arr1.length;
                    var result=[];
                    for(i=0; i<size; i++)
                    result.push(func(arr1[i], arr2[i]));

                    return result;


                    function merge2Object(first_name, last_name)
                    var arr=[];
                    arr.push(FirstName: first_name,
                    LastName: last_name);

                    return arr;



                    After this fix, you get the following result:



                    [object Object]





                    share|improve this answer

























                      1












                      1








                      1







                      You should read the textbox after the user submit the button inside the function as shown below :



                      var first_name = [];
                      var last_name = [];

                      var fInput;
                      var lInput;
                      var messageBox;

                      function insert ( )
                      fInput = document.getElementById("fname");
                      lInput = document.getElementById("lname");
                      messageBox = document.getElementById("display");
                      first_name.push( fInput.value );
                      last_name.push( lInput.value );

                      Show();


                      function Show ()
                      //clear messagebox
                      fInput.value = "";
                      lInput.value = "";

                      //show
                      messageBox.innerHTML = "";
                      messageBox.innerHTML = mergeHandler(first_name,last_name,merge2Single);
                      messageBox.innerHTML = mergeHandler(first_name,last_name,merge2Object);


                      //merges
                      function merge2Single(first, last)
                      var arr=[];
                      arr.push(first);
                      arr.push(last);
                      return arr.join(" ");


                      function mergeHandler(arr1, arr2, func)
                      var i=0;
                      var size = arr1.length;
                      var result=[];
                      for(i=0; i<size; i++)
                      result.push(func(arr1[i], arr2[i]));

                      return result;


                      function merge2Object(first_name, last_name)
                      var arr=[];
                      arr.push(FirstName: first_name,
                      LastName: last_name);

                      return arr;



                      After this fix, you get the following result:



                      [object Object]





                      share|improve this answer













                      You should read the textbox after the user submit the button inside the function as shown below :



                      var first_name = [];
                      var last_name = [];

                      var fInput;
                      var lInput;
                      var messageBox;

                      function insert ( )
                      fInput = document.getElementById("fname");
                      lInput = document.getElementById("lname");
                      messageBox = document.getElementById("display");
                      first_name.push( fInput.value );
                      last_name.push( lInput.value );

                      Show();


                      function Show ()
                      //clear messagebox
                      fInput.value = "";
                      lInput.value = "";

                      //show
                      messageBox.innerHTML = "";
                      messageBox.innerHTML = mergeHandler(first_name,last_name,merge2Single);
                      messageBox.innerHTML = mergeHandler(first_name,last_name,merge2Object);


                      //merges
                      function merge2Single(first, last)
                      var arr=[];
                      arr.push(first);
                      arr.push(last);
                      return arr.join(" ");


                      function mergeHandler(arr1, arr2, func)
                      var i=0;
                      var size = arr1.length;
                      var result=[];
                      for(i=0; i<size; i++)
                      result.push(func(arr1[i], arr2[i]));

                      return result;


                      function merge2Object(first_name, last_name)
                      var arr=[];
                      arr.push(FirstName: first_name,
                      LastName: last_name);

                      return arr;



                      After this fix, you get the following result:



                      [object Object]






                      share|improve this answer












                      share|improve this answer



                      share|improve this answer










                      answered Mar 9 at 4:26









                      Prabin PaudelPrabin Paudel

                      1,29741527




                      1,29741527





















                          0














                          Primarily I can see two issue in your code




                          1. You are loading the script before dom is ready so



                            var fInput = document.getElementById("fname");
                            var lInput = document.getElementById("lname");
                            var messageBox = document.getElementById("display");



                            js will not able to find these elements from the dom



                            To solve this issue load js near closing end of body



                            <body>
                            // rest of html
                            <script src="useMerge.js" type="text/javascript"></script>
                            </body>



                          2. If you want to join the first name and last number array , just concat those two arrays and then use join





                          var first_name = [];
                          var last_name = [];

                          var messageBox = document.getElementById("display");
                          var messageBox2 = document.getElementById("display2");

                          function insert()
                          var fInput = document.getElementById("fname");
                          var lInput = document.getElementById("lname");
                          first_name.push(fInput.value);
                          last_name.push(lInput.value);

                          Show();


                          function Show()
                          //clear messagebox
                          fInput.value = "";
                          lInput.value = "";

                          //show
                          messageBox.innerHTML = "";
                          messageBox2.innerHTML = "";

                          messageBox.innerHTML = mergeHandler(first_name, last_name, merge2Single);
                          messageBox2.innerHTML = JSON.stringify(mergeHandler(first_name, last_name, merge2Object));


                          //merges
                          function merge2Single(first, last)
                          return first_name.concat(last_name).join(' ');


                          function mergeHandler(arr1, arr2, func)
                          return func(arr1, arr2);


                          function merge2Object(first_name, last_name)
                          var arr = [];
                          arr.push(
                          FirstName: first_name,
                          LastName: last_name
                          );

                          return arr;

                          article,
                          aside,
                          figure,
                          footer,
                          header,
                          hgroup,
                          menu,
                          nav,
                          section
                          display: block;

                          <form>
                          <h1>Please enter data</h1>
                          <input id="fname" type="text" placeholder="First Name" />
                          <input id="lname" type="text" placeholder="Last Name" />
                          <input type="button" value="Save" onclick="insert()" />
                          </form>
                          <div id="display"></div>
                          <div id="display2"></div>








                          share|improve this answer



























                            0














                            Primarily I can see two issue in your code




                            1. You are loading the script before dom is ready so



                              var fInput = document.getElementById("fname");
                              var lInput = document.getElementById("lname");
                              var messageBox = document.getElementById("display");



                              js will not able to find these elements from the dom



                              To solve this issue load js near closing end of body



                              <body>
                              // rest of html
                              <script src="useMerge.js" type="text/javascript"></script>
                              </body>



                            2. If you want to join the first name and last number array , just concat those two arrays and then use join





                            var first_name = [];
                            var last_name = [];

                            var messageBox = document.getElementById("display");
                            var messageBox2 = document.getElementById("display2");

                            function insert()
                            var fInput = document.getElementById("fname");
                            var lInput = document.getElementById("lname");
                            first_name.push(fInput.value);
                            last_name.push(lInput.value);

                            Show();


                            function Show()
                            //clear messagebox
                            fInput.value = "";
                            lInput.value = "";

                            //show
                            messageBox.innerHTML = "";
                            messageBox2.innerHTML = "";

                            messageBox.innerHTML = mergeHandler(first_name, last_name, merge2Single);
                            messageBox2.innerHTML = JSON.stringify(mergeHandler(first_name, last_name, merge2Object));


                            //merges
                            function merge2Single(first, last)
                            return first_name.concat(last_name).join(' ');


                            function mergeHandler(arr1, arr2, func)
                            return func(arr1, arr2);


                            function merge2Object(first_name, last_name)
                            var arr = [];
                            arr.push(
                            FirstName: first_name,
                            LastName: last_name
                            );

                            return arr;

                            article,
                            aside,
                            figure,
                            footer,
                            header,
                            hgroup,
                            menu,
                            nav,
                            section
                            display: block;

                            <form>
                            <h1>Please enter data</h1>
                            <input id="fname" type="text" placeholder="First Name" />
                            <input id="lname" type="text" placeholder="Last Name" />
                            <input type="button" value="Save" onclick="insert()" />
                            </form>
                            <div id="display"></div>
                            <div id="display2"></div>








                            share|improve this answer

























                              0












                              0








                              0







                              Primarily I can see two issue in your code




                              1. You are loading the script before dom is ready so



                                var fInput = document.getElementById("fname");
                                var lInput = document.getElementById("lname");
                                var messageBox = document.getElementById("display");



                                js will not able to find these elements from the dom



                                To solve this issue load js near closing end of body



                                <body>
                                // rest of html
                                <script src="useMerge.js" type="text/javascript"></script>
                                </body>



                              2. If you want to join the first name and last number array , just concat those two arrays and then use join





                              var first_name = [];
                              var last_name = [];

                              var messageBox = document.getElementById("display");
                              var messageBox2 = document.getElementById("display2");

                              function insert()
                              var fInput = document.getElementById("fname");
                              var lInput = document.getElementById("lname");
                              first_name.push(fInput.value);
                              last_name.push(lInput.value);

                              Show();


                              function Show()
                              //clear messagebox
                              fInput.value = "";
                              lInput.value = "";

                              //show
                              messageBox.innerHTML = "";
                              messageBox2.innerHTML = "";

                              messageBox.innerHTML = mergeHandler(first_name, last_name, merge2Single);
                              messageBox2.innerHTML = JSON.stringify(mergeHandler(first_name, last_name, merge2Object));


                              //merges
                              function merge2Single(first, last)
                              return first_name.concat(last_name).join(' ');


                              function mergeHandler(arr1, arr2, func)
                              return func(arr1, arr2);


                              function merge2Object(first_name, last_name)
                              var arr = [];
                              arr.push(
                              FirstName: first_name,
                              LastName: last_name
                              );

                              return arr;

                              article,
                              aside,
                              figure,
                              footer,
                              header,
                              hgroup,
                              menu,
                              nav,
                              section
                              display: block;

                              <form>
                              <h1>Please enter data</h1>
                              <input id="fname" type="text" placeholder="First Name" />
                              <input id="lname" type="text" placeholder="Last Name" />
                              <input type="button" value="Save" onclick="insert()" />
                              </form>
                              <div id="display"></div>
                              <div id="display2"></div>








                              share|improve this answer













                              Primarily I can see two issue in your code




                              1. You are loading the script before dom is ready so



                                var fInput = document.getElementById("fname");
                                var lInput = document.getElementById("lname");
                                var messageBox = document.getElementById("display");



                                js will not able to find these elements from the dom



                                To solve this issue load js near closing end of body



                                <body>
                                // rest of html
                                <script src="useMerge.js" type="text/javascript"></script>
                                </body>



                              2. If you want to join the first name and last number array , just concat those two arrays and then use join





                              var first_name = [];
                              var last_name = [];

                              var messageBox = document.getElementById("display");
                              var messageBox2 = document.getElementById("display2");

                              function insert()
                              var fInput = document.getElementById("fname");
                              var lInput = document.getElementById("lname");
                              first_name.push(fInput.value);
                              last_name.push(lInput.value);

                              Show();


                              function Show()
                              //clear messagebox
                              fInput.value = "";
                              lInput.value = "";

                              //show
                              messageBox.innerHTML = "";
                              messageBox2.innerHTML = "";

                              messageBox.innerHTML = mergeHandler(first_name, last_name, merge2Single);
                              messageBox2.innerHTML = JSON.stringify(mergeHandler(first_name, last_name, merge2Object));


                              //merges
                              function merge2Single(first, last)
                              return first_name.concat(last_name).join(' ');


                              function mergeHandler(arr1, arr2, func)
                              return func(arr1, arr2);


                              function merge2Object(first_name, last_name)
                              var arr = [];
                              arr.push(
                              FirstName: first_name,
                              LastName: last_name
                              );

                              return arr;

                              article,
                              aside,
                              figure,
                              footer,
                              header,
                              hgroup,
                              menu,
                              nav,
                              section
                              display: block;

                              <form>
                              <h1>Please enter data</h1>
                              <input id="fname" type="text" placeholder="First Name" />
                              <input id="lname" type="text" placeholder="Last Name" />
                              <input type="button" value="Save" onclick="insert()" />
                              </form>
                              <div id="display"></div>
                              <div id="display2"></div>








                              var first_name = [];
                              var last_name = [];

                              var messageBox = document.getElementById("display");
                              var messageBox2 = document.getElementById("display2");

                              function insert()
                              var fInput = document.getElementById("fname");
                              var lInput = document.getElementById("lname");
                              first_name.push(fInput.value);
                              last_name.push(lInput.value);

                              Show();


                              function Show()
                              //clear messagebox
                              fInput.value = "";
                              lInput.value = "";

                              //show
                              messageBox.innerHTML = "";
                              messageBox2.innerHTML = "";

                              messageBox.innerHTML = mergeHandler(first_name, last_name, merge2Single);
                              messageBox2.innerHTML = JSON.stringify(mergeHandler(first_name, last_name, merge2Object));


                              //merges
                              function merge2Single(first, last)
                              return first_name.concat(last_name).join(' ');


                              function mergeHandler(arr1, arr2, func)
                              return func(arr1, arr2);


                              function merge2Object(first_name, last_name)
                              var arr = [];
                              arr.push(
                              FirstName: first_name,
                              LastName: last_name
                              );

                              return arr;

                              article,
                              aside,
                              figure,
                              footer,
                              header,
                              hgroup,
                              menu,
                              nav,
                              section
                              display: block;

                              <form>
                              <h1>Please enter data</h1>
                              <input id="fname" type="text" placeholder="First Name" />
                              <input id="lname" type="text" placeholder="Last Name" />
                              <input type="button" value="Save" onclick="insert()" />
                              </form>
                              <div id="display"></div>
                              <div id="display2"></div>





                              var first_name = [];
                              var last_name = [];

                              var messageBox = document.getElementById("display");
                              var messageBox2 = document.getElementById("display2");

                              function insert()
                              var fInput = document.getElementById("fname");
                              var lInput = document.getElementById("lname");
                              first_name.push(fInput.value);
                              last_name.push(lInput.value);

                              Show();


                              function Show()
                              //clear messagebox
                              fInput.value = "";
                              lInput.value = "";

                              //show
                              messageBox.innerHTML = "";
                              messageBox2.innerHTML = "";

                              messageBox.innerHTML = mergeHandler(first_name, last_name, merge2Single);
                              messageBox2.innerHTML = JSON.stringify(mergeHandler(first_name, last_name, merge2Object));


                              //merges
                              function merge2Single(first, last)
                              return first_name.concat(last_name).join(' ');


                              function mergeHandler(arr1, arr2, func)
                              return func(arr1, arr2);


                              function merge2Object(first_name, last_name)
                              var arr = [];
                              arr.push(
                              FirstName: first_name,
                              LastName: last_name
                              );

                              return arr;

                              article,
                              aside,
                              figure,
                              footer,
                              header,
                              hgroup,
                              menu,
                              nav,
                              section
                              display: block;

                              <form>
                              <h1>Please enter data</h1>
                              <input id="fname" type="text" placeholder="First Name" />
                              <input id="lname" type="text" placeholder="Last Name" />
                              <input type="button" value="Save" onclick="insert()" />
                              </form>
                              <div id="display"></div>
                              <div id="display2"></div>






                              share|improve this answer












                              share|improve this answer



                              share|improve this answer










                              answered Mar 9 at 4:21









                              brkbrk

                              30k32246




                              30k32246





















                                  0














                                  Try this in this function. Just map the object and joint the strings. By the way, you are overriding the results of your functions by trying to display the text in the same div



                                  Finally use the attribute defer in your <script> tag. Right now your javascript in the browser is running before your html is loaded. Just do this:



                                  <script src="script.js" type="text/javascript" defer></script>



                                  function merge2Object(first_name, last_name)
                                  var arr=[];
                                  arr.push(FirstName: first_name,
                                  LastName: last_name);

                                  console.log(arr);
                                  return arr.map(e => `$e.FirstName $e.LastName`).join(",");






                                  share|improve this answer



























                                    0














                                    Try this in this function. Just map the object and joint the strings. By the way, you are overriding the results of your functions by trying to display the text in the same div



                                    Finally use the attribute defer in your <script> tag. Right now your javascript in the browser is running before your html is loaded. Just do this:



                                    <script src="script.js" type="text/javascript" defer></script>



                                    function merge2Object(first_name, last_name)
                                    var arr=[];
                                    arr.push(FirstName: first_name,
                                    LastName: last_name);

                                    console.log(arr);
                                    return arr.map(e => `$e.FirstName $e.LastName`).join(",");






                                    share|improve this answer

























                                      0












                                      0








                                      0







                                      Try this in this function. Just map the object and joint the strings. By the way, you are overriding the results of your functions by trying to display the text in the same div



                                      Finally use the attribute defer in your <script> tag. Right now your javascript in the browser is running before your html is loaded. Just do this:



                                      <script src="script.js" type="text/javascript" defer></script>



                                      function merge2Object(first_name, last_name)
                                      var arr=[];
                                      arr.push(FirstName: first_name,
                                      LastName: last_name);

                                      console.log(arr);
                                      return arr.map(e => `$e.FirstName $e.LastName`).join(",");






                                      share|improve this answer













                                      Try this in this function. Just map the object and joint the strings. By the way, you are overriding the results of your functions by trying to display the text in the same div



                                      Finally use the attribute defer in your <script> tag. Right now your javascript in the browser is running before your html is loaded. Just do this:



                                      <script src="script.js" type="text/javascript" defer></script>



                                      function merge2Object(first_name, last_name)
                                      var arr=[];
                                      arr.push(FirstName: first_name,
                                      LastName: last_name);

                                      console.log(arr);
                                      return arr.map(e => `$e.FirstName $e.LastName`).join(",");







                                      share|improve this answer












                                      share|improve this answer



                                      share|improve this answer










                                      answered Mar 9 at 4:26









                                      Pato SalazarPato Salazar

                                      931719




                                      931719



























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