javascript - What determines if `return false` in link's onclick attribute prevents navigation? -


link 1 not show example site, link 2 will. why?

see fiddle code below:

js:

function myalert(what) {     alert(what); }

html:

<a href="http://www.example.com" onclick="alert('link 1');return false;">link 1</a>  <a href="http://www.example.com" onclick="myalert('link 2');return false;">link 2</a>

when viewing fiddle, open js console (f12 on windows). click second link.

you should see uncaught referenceerror: myalert not defined. because myalert not in global scope; jsfiddle scopes js code onload block automatically. can of course change no wrap - in head correct behavior.

here's working version of fiddle: http://jsfiddle.net/krd2b/


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