Question

How to determine if a character is whitespace in JavaScript

Answer 1

var ch = 'a';
if (iswhitespace(ch))
    document.write("yes<br />");
else
    document.write("no<br />");
      
var ch = ' ';
if (iswhitespace(ch))
    document.write("yes<br />");
else
    document.write("no<br />");
    
var ch = '\n';
if (iswhitespace(ch))
    document.write("yes<br />");
else
    document.write("no<br />");

var ch = '\t';
if (iswhitespace(ch))
    document.write("yes<br />");
else
    document.write("no<br />");
 
  
function iswhitespace(ch){
    return /\s/.test(ch);
}
  
/*
run:
    
no
yes
yes
yes
      
*/

 

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