Welcome to stacktrace.js!

A JavaScript tool that allows you to debug your JavaScript by giving you a stack trace of function calls leading to an error (or any condition you specify)

Usage

Just include stacktrace.js file on your page, and call it like so:

<script type="text/javascript" src="https://rawgithub.com/stacktracejs/stacktrace.js/master/stacktrace.js"></script>
<script type="text/javascript">
    // your code...
    var trace = printStackTrace();
    alert(trace.join('\n\n')); // Output however you want!
    // more code of yours...
</script>

You can also pass in your own Error to get a stacktrace not available in IE or Safari 5-

<script type="text/javascript" src="https://rawgithub.com/stacktracejs/stacktrace.js/master/stacktrace.js"></script>
<script type="text/javascript">
    try {
        // error producing code
    } catch(e) {
        var trace = printStackTrace({e: e});
        alert('Error!\n' + 'Message: ' + e.message + '\nStack trace:\n' + trace.join('\n'));
        // do something else with error
    }
</script>

Note that error message is not included in stack trace.

Bookmarklet available on the project home page.

Function Instrumentation

You can now have any (public or privileged) function give you a stacktrace when it is called:

function logStackTrace(stack) {
    console.log(stack.join('\n'));
}
var p = new printStackTrace.implementation();
p.instrumentFunction(this, 'baz', logStackTrace);

function foo() {
    var a = 1;
    bar();
}
function bar() {
    baz();
}
foo(); //Will log a stacktrace when 'baz()' is called containing 'foo()'!

p.deinstrumentFunction(this, 'baz'); //Remove function instrumentation

Get stacktrace.js

npm install stacktrace-js
bower install stacktrace-js
component install stacktrace.js
wget https://rawgithub.com/stacktracejs/stacktrace.js/master/stacktrace.js

Browser Support

It is currently tested and working on:

• Firefox (and Iceweasel) 0.9+
• Google Chrome 1+
• Safari 3.0+ (including iOS 1+)
• Opera 7+
• IE 5.5+
• Konqueror 3.5+
• Flock 1.0+
• SeaMonkey 1.0+
• K-Meleon 1.5.3+
• Epiphany 2.28.0+
• Iceape 1.1+

Contributions

This project is made possible due to the efforts of these fine people:

• Eric Wendelin
• [Victor Homyakov] (https://github.com/victor-homyakov)
• Luke Smith
• Many others