How to read the JavaScript source code in an html page

Question

Is there a way that a JavaScript function can read the JavaScript source code of other functions in an html page, so that the function can do some checking job on the javascript source code of these other functions?

Maybe a walkabout is how to get the source code of all JavaScript functions in an HTML page.

nickf · Accepted Answer · 2010-06-10 06:34:40Z

4

If you want to see the source of a function, you can use the toSource() function:

function x(a) {
    return a + 1;
}
console.log(x.toSource());
// "function x(a) {
//    return a + 1;
// }"

I'm not sure about how you'd read the source outside of a function, or even why you'd particularly want to do this.

answered Jun 10, 2010 at 6:34

nickf

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1 Comment

Paul Over a year ago

I edited my question to make it bit clearer. Basically, I'd like to have a function that can checking other functions.

statenjason · Accepted Answer · 2010-06-10 06:37:23Z

3

If you want the entire script tag try the following:

<html>
<head><title>Testing</title></head>
<body>
This is body text.

<input type="button" onClick="javascript:readScript()" value="Read it!" />

<script type="text/javascript" id="myscript">
    function readScript(){
        var html = document.getElementById("myscript").innerHTML;
        alert(html);
    }
</script>
</body>
</html>

answered Jun 10, 2010 at 6:37

statenjason

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