DIY javascript stack trace

js-stack-trace.js

// Copied from http://helephant.com/2007/05/12/diy-javascript-stack-trace/ - read more about the approach there

Function.prototype.trace = function()
{
    var trace = [];
    var current = this;
    while(current)
    {
        trace.push(current.signature());
        current = current.caller;
    }
    return trace;
}

Function.prototype.signature = function()
{
    var signature = {
        name: this.getName(),
        params: [],
        toString: function()
        {
            var params = this.params.length > 0 ?
                "'" + this.params.join("', '") + "'" : "";
            return this.name + "(" + params + ")"
        }
    };
    if(this.arguments)
    {
        for(var x=0; x<this .arguments.length; x++)
            signature.params.push(this.arguments[x]);
    }
    return signature;
}

Function.prototype.getName = function()
{
    if(this.name)
        return this.name;
    var definition = this.toString().split("\n")[0];
    var exp = /^function ([^\s(]+).+/|>;
    if(exp.test(definition))
        return definition.split("\n")[0].replace(exp, "$1") || "anonymous";
    return "anonymous";
}