How to read the JavaScript source code in an html page
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 check开发者_运维技巧ing 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.
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.
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>
加载中,请稍侯......
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