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chakrit/gist:1281902

Created October 12, 2011 17:29
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gistfile1.js
<html>
<head>
<script type="text/javascript">
function foo() { alert("FOO"); }
function bar() { alert("BAR"); }
// UNCOMMENT CODE TO SEE EFFECT
/* var useBar = false;
foo = (function(oldFoo) {
return function() {
if (useBar) { bar(); } else { oldFoo(); }
};
})(foo); */
function button_click() {
foo();
}
function change_click() {
useBar = !useBar;
}
</script>
</head>
<body>
<button onclick="button_click()">Click me</button>
<button onclick="change_click()">Change handler</button>
</body>
</html>
@chakrit
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chakrit commented Oct 12, 2011

Commented out code:

var useBar = false;
foo = (function(oldFoo) {
  return function() {
    if (useBar) { bar(); } else { oldFoo(); }
  };
})(foo);

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