SportsFanLive: It’s Like Netvibes For Sports »
« A simple solution to the “other” problem with select boxes

Getting a JavaScript stracktrace in any browser

Written by on August 18th, 2008 in Uncategorized.

You can follow any responses to this entry through the RSS 2.0 feed. Responses are currently closed, but you can trackback from your own site.

Eric Wendelin has posted on getting a JavaScript stack trace no matter that the browser.

With Firebug you can call console.trace() but what about the rest?

Luke Smith took Eric’s work and added to it, ending up with:

PLAIN TEXT
JAVASCRIPT:

  1.  
  2. (function () {
  3. YOUR_NAMESPACE.getStackTrace = (function () {
  4.  
  5. var mode;
  6. try {(0)()} catch (e) {
  7.     mode = e.stack ? ‘Firefox’ : window.opera ? ‘Opera’ : ‘Other’;
  8. }
  9.  
  10. switch (mode) {
  11.     case ‘Firefox’ : return function () {
  12.         try {(0)()} catch (e) {
  13.             return e.stack.replace(/^.*?\n/,”).
  14.                            replace(/(?:\n@:0)?\s+$/m,”).
  15.                            replace(/^\(/gm,‘{anonymous}(’).
  16.                            split(“\n“);
  17.         }
  18.     };
  19.  
  20.     case ‘Opera’ : return function () {
  21.         try {(0)()} catch (e) {
  22.             var lines = e.message.split(“\n“),
  23.                 ANON = ‘{anonymous}’,
  24.                 lineRE = /Line\s+(\d+).*?in\s+(http\S+)(?:.*?in\s+function\s+(\S+))?/i,
  25.                 i,j,len;
  26.  
  27.             for (i=4,j=0,len=lines.length; i<len; i+=2) {
  28.                 if (lineRE.test(lines[i])) {
  29.                     lines[j++] = (RegExp.$3 ?
  30.                         RegExp.$3 + ‘()@’ + RegExp.$2 + RegExp.$1 :
  31.                         ANON + RegExp.$2 + ‘:’ + RegExp.$1) +
  32.                         ‘ — ‘ + lines[i+1].replace(/^\s+/,”);
  33.                 }
  34.             }
  35.  
  36.             lines.splice(j,lines.length-j);
  37.             return lines;
  38.         }
  39.     };
  40.  
  41.     default : return function () {
  42.         var curr  = arguments.callee.caller,
  43.             FUNC  = ‘function’, ANON = “{anonymous}”,
  44.             fnRE  = /function\s*([\w\-$]+)?\s*\(/i,
  45.             stack = [],j=0,
  46.             fn,args,i;
  47.  
  48.         while (curr) {
  49.             fn    = fnRE.test(curr.toString()) ? RegExp.$1 || ANON : ANON;
  50.             args  = stack.slice.call(curr.arguments);
  51.             i     = args.length;
  52.  
  53.             while (i–) {
  54.                 switch (typeof args[i]) {
  55.                     case ’string’  : args[i] = ‘"’+args[i].replace(/“/g,’\\“‘)+’“‘; break;
  56.                     case ‘function’: args[i] = FUNC; break;
  57.                 }
  58.             }
  60.             stack[j++] = fn + ‘(’ + args.join() + ‘)’;
  61.             curr = curr.caller;
  62.         }
  63.         return stack;
  64.     };
  65. }
  66. })();

Source: Ajaxian » Front Page
Original Article: http://feeds.feedburner.com/~r/ajaxian/~3/367995726/getting-a-javascript-stracktrace-in-any-browser

Comments are closed.


Site Navigation

Pages

Recently

Archives