Question

How to check if string is empty in JavaScript

Answer 1

var s = "";

if (s === "") {
    document.write("yes");
}
else {
    document.write("no");
}



     
/*
run:
 
yes
          
*/
  

 

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Answer 2

function is_empty(s) {
    return (!s || 0 === s.length);
}
   
var s = "";

if (is_empty(s)) {
    document.write("yes");
}
else {
    document.write("no");
}



     
/*
run:
 
yes
          
*/

 

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