How To Debug Javascript In Internet Explorer

How To Debug Javascript In Internet Explorer – Microsoft has completely redesigned the F12 tools in Internet Explorer 11. They have a completely new user interface and new features that make development and debugging faster and easier.

You can access them from a browser window by pressing F12. If your keyboard doesn’t have function keys, you can select “

How To Debug Javascript In Internet Explorer

How To Debug Javascript In Internet Explorer

With the debugger, you can examine what your code is doing, when it’s doing it, and how it’s doing it. Pause your code in the middle of execution, step through it line by line, and monitor the state of variables and objects at each step. New features in the debugger include:

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The F12 Tools interface has eight different tools, each with its own tab. Here you’ll find a picture of each tool, a quick summary of what it does and what’s new, and some common development or debugging tasks that the tool makes easy. Check the link “Using F12 Developer Tools in Internet Explorer 11”

How To Debug Javascript In Internet Explorer

Step 1: Before trying to debug your JavaScript, make sure “Disable Script Debugging (Internet Explorer)” and “Disable Script Debugging (Other)” are unchecked in the “Advanced” tab of Internet Explorer Options. Yes, these options are checked by default. .

From the “Tools” menu. On the left side you will see “DOM Explorer Tool (CTRL + 1)”, click on “Debugger (CTRL+3)”.

How To Debug Javascript In Internet Explorer

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Step 4: Expand the CRM page under “Open Document (CTRL+O)” and check if the JavaScript file is loaded, click on the JavaScript file and set the debugger where you want.

C# CRM 2011 CRM 2013 CRM 2015 CRM 2016 Custom Workflow Dynamics 365 Retrieve XML General JavaScript OData Plugin Ribbon Rollup SDK SQL System Settings JavaScript Debugging in Internet Explorer 11 in 7 Easy Steps by Stuart | Posted on December 14, 2020 | 11 minutes (2193 words)

How To Debug Javascript In Internet Explorer

The developer tools built into IE11 make it relatively easy to develop and debug code in the browser. Browser Tools boasts many of the features of other developer-focused browsers such as Chrome and Firefox.

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Although Microsoft has announced that support for IE11 will end on August 17, 2021, while many people still use the browser, it’s useful to have some debugging skills handy.

How To Debug Javascript In Internet Explorer

We will use CrashReport to find the stack trace and the line of code where the error occurred. You can sign up for a free 14-day trial here.

To demonstrate how to debug an application using Internet Explorer’s developer tools, I’ll use a simple add-person form. This form allows you to enter your first name, middle name and last name. After clicking the “Save” button, the form will execute a bit and the data will be sent to your (imaginary) server.

How To Debug Javascript In Internet Explorer

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Unfortunately, after deploying to production late Friday night, you start receiving error messages on your dashboard. An error has occurred and you need to fix it quickly.

The error messages that come up contain a lot of information that you can use to find and fix the error, so let’s take a look at what we’re dealing with.

How To Debug Javascript In Internet Explorer

The message section of Stacktrace is a brief overview of what went wrong. in this case,

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Stacktrace tells you where the error occurred and the sequence of function calls that caused it. As you can see in the screenshot above, the error occurred.

How To Debug Javascript In Internet Explorer

Knowing which line triggered the error means you can go straight to where the error occurred and start looking for the cause of the problem.

The first step is to launch the application in Internet Explorer and open Developer Tools. You can do this by using the F12 key from your keyboard or by selecting “F12 Developer Tools” from the “Tools” menu.

How To Debug Javascript In Internet Explorer

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The Developer Tools will now open in a browser tab and the DOM Explorer tab will be enabled. Go to the Console tab by clicking on its name. The Console tab allows you to run JavaScript code or view any output at any time.

The Console tab is a valuable debugging tool because you can use it as a notebook to test code and review variables when diagnosing a problem.

How To Debug Javascript In Internet Explorer

To debug the code, you must first go through the source code in the developer tools. You do this on the Debugger tab.

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Click the button at the top left of the tab to access a tree view of all the source files loaded into the page. You can navigate files here like in the IDE, as the content appears in the main panel.

How To Debug Javascript In Internet Explorer

If you have a lot of files, you can search for them by typing the file name in the text box at the top of the file browser.

Now you can look at your code, we want to go through it line by line to see where things go wrong. We use breakpoints for this purpose. Breakpoints are markers at specific points in the code that stop execution so that you can check the state of the code at that point and continue execution line by line.

How To Debug Javascript In Internet Explorer

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The most common way to add a breakpoint is to find the specific line you want to break and add it there. Navigate to the file and line you are interested in and click on the line number. A red marker will be added to this line and execution will stop whenever this line of code is hit. In the screenshot below, it stops at line 7.

You can force execution to break when a specific event (or group of events) occurs on the page. On the right side of the Debug panel, next to the Call Stack item, you can select the Breakpoints tab. Then click the “Add Event Breakpoint” button and select the event you want to break from the list. You can optionally add a condition expression to prevent execution from stopping every time.

How To Debug Javascript In Internet Explorer

You can also add breakpoints programmatically, which can be useful if you don’t want to crawl through the code in the developer tools when you have it working in the IDE. You can also use this approach to introduce breakpoints conditionally, such as at certain loop iterations, or if the code is running on page load and there is no time to add a breakpoint manually. .

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At the point where you want to stop execution. The code below will have the same effect as the line break point above.

How To Debug Javascript In Internet Explorer

Developer Tools has a handy feature that stops execution when your code encounters an exception, allowing you to investigate what’s happening at the time of the error. You can even choose to catch exceptions that are already handled by a try/catch statement.

To enable this feature, click on the stopwatch icon with the pause symbol and select the desired option from the list. After activation it will turn blue.

How To Debug Javascript In Internet Explorer

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Now that we know how to break down our code, we want to step through each line to see what’s happening. First, place a breakpoint on line 7 – right in the add button’s click handler so we can start over.

Method This method is called three times, so which case is the culprit? You can look a little closer at the Stacktrace and see that it was the call from line 13 that caused the error. You know that line 13 is related to the middle name value. Therefore, you should focus your efforts on reproducing the error by creating the assignment correctly.

How To Debug Javascript In Internet Explorer

With this additional information, you can fill in the first name and last name fields, but leave the middle name blank to see if that causes an error.

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Press the Save button. From here, the Source tab will open where you can see the breakpoint being activated. Now you can start going through the code. Use the four buttons on the tuning panel to do this.

How To Debug Javascript In Internet Explorer

You will use them to access your capitalize string function. So, from line 7, use the “Exceed” button until we reach line 13. The active line will appear with a yellow background and an orange arrow pointing to it.

As you move through code like this, you’ll probably want to return to the parent function to see what was happening at that point. To do this, use the call stack section, which lists all the functions you’ve passed through to get to that point in your code – just like the call stack shown in the error message. Is.

How To Debug Javascript In Internet Explorer

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You can click on an item in this list and you will be taken back to that function. Note that the current position of execution does not change, so using the Step Over button will continue from the top of the call stack.

Now that you’ve gone to where your error occurred, we need to examine the state of the application to see what caused the error.

How To Debug Javascript In Internet Explorer

There are several ways to find out what values ​​a variable has and to evaluate the expression before the code proceeds. We will look at each of them in turn.

The Console And Conditionals

The easiest way

How To Debug Javascript In Internet Explorer

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