I working with jQuery and I need to get anytime and anywere exception (with any operation), if I attach some event or try to perform some action with elements (got from selector) that don't exist. Is there some internal "strict" mode in jQuery for this issue?
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3 Answers
No, there isn't.
However, you could make a simple plugin for it:
$.fn.checkEmpty = function() {
if (!this.length)
throw new Error("No elements matched by " + this.selector);
return this;
};
$('...').checkEmpty().bind(...);
Alternatively:
function $s() { return $.apply(this, arguments).checkEmpty(); }
$s('...').bind(...);
Comments
Check this post for ways to handle an "exists"
answered May 11, 2010 at 15:59
Mark Schultheiss
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2 Comments
SLaks
This does not answer the question.
Mark Schultheiss
Right, the real answer is "no" for strict mode, there are no modes. This just points out some alternatives.
No, this is the beauty of jQuery.
You could create a wrapper function
function myjQuery() {
var res = $.apply(this, arguments);
if (!res.size()) {
throw new Error("No elements matched :(");
};
return res;
};
myjQuery('input').each();
This won't mask empty sets returned by using find() or filter() and the like, but humm...
1 Comment
Richard Möhn
How come you see this as ‘beauty’?