How do you launch the JavaScript debugger in Google Chrome?


When using Google Chrome, I want to debug some JavaScript code. How can I do that?

Windows: CTRL-SHIFT-J OR F12

Mac: ?-?-J

Also available through the wrench menu (Tools > JavaScript Console):

JavaScript Console Menu


Try adding this to your source:

debugger;

It works in most, if not all browsers. Just place it somewhere in your code, and it will act like a breakpoint.


Windows and Linux:

Ctrl + Shift + I keys to open Developer Tools

Ctrl + Shift + J to open Developer Tools and bring focus to the Console.

Ctrl + Shift + C to toggle Inspect Element mode.

Mac:

? + ? + I keys to open Developer Tools

? + ? + J to open Developer Tools and bring focus to the Console.

? + ? + C to toggle Inspect Element mode.

Source

Other shortcuts


Press the F12 function key in the Chrome browser to launch the JavaScript debugger and then click "Scripts".

Choose the JavaScript file on top and place the breakpoint to the debugger for the JavaScript code.


Ctrl + Shift + J opens Developer Tools.


In Chrome 8.0.552 on a Mac, you can find this under menu View/Developer/JavaScript Console ... or you can use Alt+CMD+J.


Here, you can find the shortcuts to access the developer tools.

https://developer.chrome.com/devtools/docs/shortcuts


Shift + Control + I opens the Developer tool window. From bottom-left second image (that looks like the following) will open/hide the console for you:

Show Console


To open the dedicated ‘Console’ panel, either:

  • Use the keyboard shortcuts
    • On Windows and Linux: Ctrl + Shift + J
    • On Mac: Cmd + Option + J
  • Select the Chrome Menu icon, menu -> More Tools -> JavaScript Console. Or if the Chrome Developer Tools are already open, press the ‘Console’ tab.

Please refer here


For Mac users, go to Google Chrome --> menu View --> Developer --> JavaScript Console.

Screenshot


Now google chrome has introduce new feature. By Using this feature You can edit you code in chrome browse. (Permanent change on code location)

For that Press F12 --> Source Tab -- (right side) --> File System - in that please select your location of code. and then chrome browser will ask you permission and after that code will be sink with green color. and you can modify your code and it will also reflect on you code location (It means it will Permanent change)

Thanks


The most efficient way I have found to get to the javascript debugger is by running this:

chrome://inspect


F12 opens the developer panel

CTRL + SHIFT + C Will open the hover-to-inspect tool where it highlights elements as you hover and you can click to show it in the elements tab.

CTRL + SHIFT + I Opens the developer panel with console tab

RIGHT-CLICK > Inspect Right click any element, and click "inspect" to select it in the Elements tab of the Developer panel.

ESC If you right-click and inspect element or similar and end up in the "Elements" tab looking at the DOM, you can press ESC to toggle the console up and down, which can be a nice way to use both.


These are the tools you see

Press the F12

developer tools


From the console in Chrome, you can do console.log(data_to_be_displayed).