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Rendering in a map function lead to a JsLint error as Expected an assignment or function call and instead saw an expression?

Expected an identifier and instead saw '<'. Expected ':' and instead saw '.'. Unclosed regular expression. Unrecoverable syntax error.unused expression, expected an assignment or function call“Expected an assignment but found an expression”Expected an assignment or function call and instead saw an expression in ReactExpected an assignment or function call and instead saw an expression in reactjs while using graphcmsLine 28: Expected an assignment or function call and instead saw an expressionExpected an assignment or function call and instead saw an expression no-unused-expressions error in ReactExpected an assignment or function call and instead saw an expression no-unused-expressions react jsRedirect (react router dom) giving Expected an assignment or function call and instead saw an expression no-unused-expressionsExpected an assignment or function call and instead saw an expression inside switch statment - React js

2

Problem:

I have created a react application. There it is giving me an error of

 Line 13: Expected an assignment or function call and instead saw an expression no-unused-expressions

This is my code which is causing the error.

renderList = movies => 
 if (movies) 
 return movies.map((movie, index) => 
 <div>Hi</div>;
 );
 
 ;

Can someone help me to modify this code part to get rid of this error?. Because every question regarding this error says only to remove the JsHint expression. I want to do it without disabling the JsHint expression. Thank you.

reactjs

share|improve this question

asked Mar 8 at 10:59

dwpdwp

15810

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Did you try with below solution?
  
  – Hemadri Dasari
  Mar 9 at 2:37
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @HemadriDasari yeah It works.Thank you
  
  – dwp
  Mar 9 at 2:43
  

  
  
  
  

add a comment | 

2

Problem:

I have created a react application. There it is giving me an error of

 Line 13: Expected an assignment or function call and instead saw an expression no-unused-expressions

This is my code which is causing the error.

renderList = movies => 
 if (movies) 
 return movies.map((movie, index) => 
 <div>Hi</div>;
 );
 
 ;

Can someone help me to modify this code part to get rid of this error?. Because every question regarding this error says only to remove the JsHint expression. I want to do it without disabling the JsHint expression. Thank you.

reactjs

share|improve this question

asked Mar 8 at 10:59

dwpdwp

15810

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Did you try with below solution?
  
  – Hemadri Dasari
  Mar 9 at 2:37
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @HemadriDasari yeah It works.Thank you
  
  – dwp
  Mar 9 at 2:43
  

  
  
  
  

add a comment | 

Problem:

I have created a react application. There it is giving me an error of

 Line 13: Expected an assignment or function call and instead saw an expression no-unused-expressions

This is my code which is causing the error.

renderList = movies => 
 if (movies) 
 return movies.map((movie, index) => 
 <div>Hi</div>;
 );
 
 ;

Can someone help me to modify this code part to get rid of this error?. Because every question regarding this error says only to remove the JsHint expression. I want to do it without disabling the JsHint expression. Thank you.

reactjs

share|improve this question

asked Mar 8 at 10:59

dwpdwp

15810

 Line 13: Expected an assignment or function call and instead saw an expression no-unused-expressions

renderList = movies => 
 if (movies) 
 return movies.map((movie, index) => 
 <div>Hi</div>;
 );
 
 ;

share|improve this question

asked Mar 8 at 10:59

dwpdwp

15810

share|improve this question

asked Mar 8 at 10:59

dwpdwp

15810

asked Mar 8 at 10:59

dwpdwp

15810

asked Mar 8 at 10:59

dwpdwp

15810

1 Answer
1

active

oldest

votes

2

Your map function missing return keyword and you also need to set unique key to div element which is missing in your code

Change

 return movies.map((movie, index) => 
 <div>Hi</div>;
 );

To

With curly brackets and return

 return movies.map((movie, index) => 
 return <div key="Key-"+index>Hi</div>;
 );

Or

Without curly brackets and without return

 return movies.map((movie, index) => <div key="Key-"+index>Hi</div>);

Anyone of the above change would fix the error

share|improve this answer

edited Mar 9 at 4:42

answered Mar 8 at 11:02

Hemadri DasariHemadri Dasari

10.2k32152

add a comment | 

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2

Your map function missing return keyword and you also need to set unique key to div element which is missing in your code

Change

 return movies.map((movie, index) => 
 <div>Hi</div>;
 );

To

With curly brackets and return

 return movies.map((movie, index) => 
 return <div key="Key-"+index>Hi</div>;
 );

Or

Without curly brackets and without return

 return movies.map((movie, index) => <div key="Key-"+index>Hi</div>);

Anyone of the above change would fix the error

share|improve this answer

edited Mar 9 at 4:42

answered Mar 8 at 11:02

Hemadri DasariHemadri Dasari

10.2k32152

add a comment | 

2

Your map function missing return keyword and you also need to set unique key to div element which is missing in your code

Change

 return movies.map((movie, index) => 
 <div>Hi</div>;
 );

To

With curly brackets and return

 return movies.map((movie, index) => 
 return <div key="Key-"+index>Hi</div>;
 );

Or

Without curly brackets and without return

 return movies.map((movie, index) => <div key="Key-"+index>Hi</div>);

Anyone of the above change would fix the error

share|improve this answer

edited Mar 9 at 4:42

answered Mar 8 at 11:02

Hemadri DasariHemadri Dasari

10.2k32152

add a comment | 

Your map function missing return keyword and you also need to set unique key to div element which is missing in your code

Change

 return movies.map((movie, index) => 
 <div>Hi</div>;
 );

To

With curly brackets and return

 return movies.map((movie, index) => 
 return <div key="Key-"+index>Hi</div>;
 );

Or

Without curly brackets and without return

 return movies.map((movie, index) => <div key="Key-"+index>Hi</div>);

Anyone of the above change would fix the error

share|improve this answer

edited Mar 9 at 4:42

answered Mar 8 at 11:02

Hemadri DasariHemadri Dasari

10.2k32152

 return movies.map((movie, index) => 
 <div>Hi</div>;
 );

 return movies.map((movie, index) => 
 return <div key="Key-"+index>Hi</div>;
 );

 return movies.map((movie, index) => <div key="Key-"+index>Hi</div>);

share|improve this answer

edited Mar 9 at 4:42

answered Mar 8 at 11:02

Hemadri DasariHemadri Dasari

10.2k32152

answered Mar 8 at 11:02

Hemadri DasariHemadri Dasari

10.2k32152

answered Mar 8 at 11:02

Hemadri DasariHemadri Dasari

10.2k32152