Check For Javascript Error
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the new WordPress Code Reference! Using Your Browser to Diagnose JavaScript Errors If you're experiencing issues with your interactive functionality this may be due to JavaScript errors or conflicts. For example, your flyout menus may be broken, your metaboxes don't drag, or your add media buttons javascript error check online aren't working. In order to formulate your support request it helps the team to javascript error checker know what the JavaScript error is. This guide will show you how to diagnose JavaScript issues in different browsers. Contents 1 Step 1:
Javascript Form Error Check
Try Another Browser 2 Step 2: Enable SCRIPT_DEBUG 3 Step 3: Diagnosis 3.1 Firefox 3.2 Internet Explorer 3.3 Chrome 3.4 Safari 3.5 Opera 4 Step 4: Reporting Step 1: Try Another Browser To make sure that this
Javascript Syntax Check
is a JavaScript error, and not a browser error, first of all try opening your site in another browser. if the site is not having the same issue in the new browser you know that the error is browser specific if the site is having the same error it is not an error that is specific to one browser Make note of any browsers you are experiencing the error in. You can use this information javascript error handling when you are making a support request. Step 2: Enable SCRIPT_DEBUG You need to turn on script debugging. Open wp-config.php and add the following line before "That's all, stop editing! Happy blogging". define('SCRIPT_DEBUG', true); Check to see if you are still having an issue. Issue is fixed - turn off script debugging and report the issue on the support forum, telling the volunteers that you turned on script debugging and it solved the problem. Issue persists - proceed to Step 3. Step 3: Diagnosis Now that you know which browsers you are experiencing issues in you can start to diagnose the issue. Firefox 1. Open the Console Go to the screen where you are experiencing the error. In Firefox, navigate to Tools > Web Developer > Error Console or press Ctrl + Shift + J. 2. Identify the Error The error console will open. If you don't see any errors try reloading the page. The error may be generated when the page loads. The console will provide you with the error type, the location of the error and the line number The image above shows the error to be in jquery.js on line 2. Internet Explorer Bear in mind, IE behaves vastly differently from other browsers when it comes to JS errors, and reports on them in disparate ways. The first thin
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here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more http://stackoverflow.com/questions/5279226/how-to-check-client-side-javascript-code-for-errors about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping http://getfirebug.com/errors each other. Join them; it only takes a minute: Sign up How to check client-side JavaScript code for errors? [closed] up vote 16 down vote favorite I have some client-side JavaScript code and want to check that file javascript error for errors/warnings. What is the easiest way to check my JavaScript file for errors? javascript javascript-debugger share|improve this question edited Feb 18 '14 at 13:57 Dan Dascalescu 32.2k13130170 asked Mar 11 '11 at 22:52 Steven Hammons 71151530 closed as too broad by meagar♦ Dec 11 '15 at 15:41 There are either too many possible answers, or good answers would be too long for this format. Please add details to narrow the answer set or to isolate an javascript error check issue that can be answered in a few paragraphs.If this question can be reworded to fit the rules in the help center, please edit the question. google chrome OR firefox + firebug –Luca Filosofi Mar 11 '11 at 22:53 1 You should clarify whether you mean you want to check for problems in Javascript code before you run it, or if you mean viewing errors caused at runtime. –adamjford Mar 11 '11 at 22:57 add a comment| 7 Answers 7 active oldest votes up vote 29 down vote accepted Copy and paste it into http://www.jslint.com/ but be prepared to "have your feelings hurt". share|improve this answer answered Mar 11 '11 at 22:53 Shaggy Frog 22.9k1268118 add a comment| up vote 6 down vote Opening your JavaScript console in the Chrome browser with (Tools->JavaScript console) or (CTRL + SHIFT + J) is always a good place to start. However, JSLint is really your best bet. share|improve this answer edited Oct 24 '13 at 19:04 Eric Leschinski 46.1k23219190 answered Mar 11 '11 at 22:56 Yottagray 1,13231936 add a comment| up vote 5 down vote I'd reccomend trying out the Google Closure Compiler. Not only can it check your code for errors it can also perform some optimizations. "Compiler" here might be a bit of a misnomer since it takes in JavaScript and outputs back JavaScript. To try i
Source Firebug Lite Extensions Firebug and Errors When things go wrong, Firebug lets you know immediately and gives you detailed and useful information about the errors in JavaScript, CSS, and XML. Firebug Start Button On the right side of the Firefox browser's tool bar you will see a little Firebug icon. This is Firebug's entry point (aka Start button). It can be used to open the Firebug UI, access basic commands or see whether there are any JavaScript errors on the page. No error soup Most browsers report errors by dumping them all into one big window that includes the problems with every web page you've ever visited. Firebug is kinder than that; it shows you only the errors for the page that you're looking at. Informative JavaScript errors JavaScript errors include a wealth of information about what went wrong, including a description, the file and line number, and the line of source code that caused the error. Even more importantly, if you click the arrow to expand the description you will see a complete stack trace including the values of all function arguments. Jump to the debugger Every error report has a link on its right side that points to the file and line number where the error occurred. Clicking this link will take you right to the Firebug JavaScript debugger or CSS inspector so that you can get started on solving the problem right away. Some errors also include the actual snippet of source that contains the error, which is also a link to the original file. Quick search Using the quick search box, you can filter the Firebug Console to show only the errors and messages that match the text that you searched for. As new rows are added to the console, they will only appear if they match the text in the quick search box. Filtering errors Firebug i