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Editorial Team
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Asked: 2026-05-25T23:59:55+00:00

Can you set variables in the beginning of a file to be set through

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Can you set variables in the beginning of a file to be set through out?

Example:

var works = $('#id1'); 
var span = $('.icon');

works.focus(function() {
    if(this.value.length == 0)
    span.hide();
});

works.keyup(function() {

if(this.value.length > 0 && !span.is(':visible'))
        span.stop().show();
    else if(this.value.length == 0)
        span.stop().hide();
});

The variable span inside the function doesn’t work. Instead of adding var span = $('.icon'); in each function is it possible I can make it work?

Thanks alot

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1 Answer

  1. Editorial Team

    Yes, you can have global variables, but if you initialize them in a <script> block in the <head> they’ll be empty. The DOM won’t have been loaded.

    You can instead do this:

    $(function() {
  var span = $('.whatever');

  $('something.else').click(function() {
    // span will work here
  });

});

    Not quite the same as globals, but in a way that’s better since true globals are kind-of a bad idea. Anything declared with var inside the $(function() { ... }) code will be effectively global to all code in that initialization function.

    Oh, and note that putting the initialization code in a function invoked with $() is the jQuery way of deferring execution until the DOM is ready. That will work in a script in the <head>, and it’ll also work if you import your scripts at the end of the <body> as many luminaries now advise.

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