Debugging JavaScript in chrome

chrome js debugger
js debugging chrome
debugging js using chrome
debugging javascript with google chrome

To debug JavaScript in Google chrome use developer tools.

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To launch Developer Tools in Google chrome
1. Click on Customise and Control Google chrome button on the top right corner of the browser window
2. From the More tools option, select Developer tools

Alternatively you can also use the keyboard shortcut F12.

You can find JavaScript errors if any in the developer tools.

Use the Console tab in the developer tools to find the source file of the JavaScript that caused the error. This will also tell you the line number of the error.

Click on the JavaScript file name in the Console tab. This will open the JavaScript file in the Sources tab and underlines the line that caused the error with a red squiggly.

Setting breakpoints in Google Chrome : To set a breakpoint, simply click on the grey margin where you see line numbers in the Sources tab.

A blue tag appears indicating that a breakpoint is set. At this point if you reload the page, the breakpoint should be hit and you should be able to step thru the code using the following keyboard shortcuts.

Step over - F10
Step into - F11
Step out - Shift + F11
Continue - F8

You can also use the respective buttons in the Developer tools to step thru the code instead of using the keyboard shortcuts.

To remove a breakpoint simply click on the grey margin again.

Setting a conditional breakpoint : To set a conditional breakpoint, right click on the grey margin and select "Add conditional breakpoint. You can then specify the condition that should be true for the breakpoint to be hit.

Call stack panel : The Call Stack panel displays the complete execution path.

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[jyotsnasingh]

thank you so much for this video. Its the shortest and simplest tutorial I have come across which explains how to use chrome browser for javascript debugging.

[andrewbowers_]

You have natural ability to teach others because you convey the important parts of the task in a simple and relevant manner. That comes from knowing your subject well.

[ConaxHateGG]

Woohoo!!! Finally finished watching the whole series of 75 videos. Thank you sir.

[kanecain]

This may be two years old, but in 8 minutes I learned more about browser debugging than I thought I would!

[sundarkartick]

I am regular visitor of your learning videos. I learned a lot from your videos especially wcf concepts. Thanks a ton for your initiative.

[lifeislove]

what a many videos on youtube but in yours, technic is so good, So thank you very much for help us sir.
but sir I LIKE MORE YOUR ENGLISH PRONUNCIATION THAN JS.... too good, i will try like you.

[DeepakSahu-jxlm]

Finally I finished all 75 videos of JavaScript very nice journey and tutorials with good explanation example .thanks Venkat Sir

[rd]

such finesse when he says developer tools

[jiggeys]

Just finished this video series Venkat. They were absolutely great. You have a great knack for focusing on the right concepts, in the right words, at the stage. Great Job overall.

[thejasvinitheju]

The explanation is crisp and complete. For someone who always wants to listen to the "crux of the matter". Appreciate your time in creating the video. Found it helpful. Thanks buddy!!

[vladanng]

I watched all yout 75 videos on JS. Some even 2x/3x times to learn better, and remeber. Definately the BEST tutorials on Js. I guess for other languages aswell! Cheers!!!

[djmaxdesigns]

I'm so happy that there are people like you in this world.

[afshakhan]

Best tutor and best series for JS.
Your voice is just too good to hear.

[lifetraveler]

I have watched the entire series in 2020. Thank you posting it

[teenajose]

Thanks.... great tutorial ...I learned lot of things regarding JavaScript thanks again

[keeleye]

Nice and clear, with simple JS examples. Thank you.

[mahmoodkabi]

I think this tutorial is the best one that a student can find.

[ACLAproductions]

Just finished the tutorial! Thank you so much for all your hard work and effort! :) You've helped me a lot :)

[mirjana]

Thank you for this tutorial, very informational, clear and straight to the point. You managed to teach me more in 9 minutes then what many other videos do not manage in 20. Keep up the good work!

[virendrasonkaria]

First of all in starting you didn't waste time by saying like subscribe stuffs that usually waste 2 to 3 minutes so thanks for that and I going to subscribe and like this video.
Second loved the speed you taught us I completely got every point.
Third the way you ended by saying good day loved it
The main point you didn't took much time and taught me good knowledge.
Thanks