JavaScript: SyntaxError: missing ) after argument list

Question

I am getting the error:

SyntaxError: missing ) after argument list

With this javascript:

var nav = document.getElementsByClassName('nav-coll'); for (var i = 0; i < button.length; i++) {     nav[i].addEventListener('click',function(){             console.log('haha');         }     }, false); }; 

What does this error mean?

Answer 1

You have an extra closing } in your function.

var nav = document.getElementsByClassName('nav-coll'); for (var i = 0; i < button.length; i++) {     nav[i].addEventListener('click',function(){             console.log('haha');         }        // <== remove this brace     }, false); }; 

You really should be using something like JSHint or JSLint to help find these things. These tools integrate with many editors and IDEs, or you can just paste a code fragment into the above web sites and ask for an analysis.