How to pause script execution in Developers console

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I'm trying to create a rotating banner (JavaScript & CSS). For debugging and making changes on the CSS etc in the developers' console, I want to pause the JavaScript execution while I make changes and then run it or so on. So, is there a way to pause the script execution in the browser?

You are looking for "breakpoints".

Which browser are you using?

Chrome supports breakpoints right away in its developer tools: F12 (or Ctrl-Shift-I), "Script" tab, select script from dropdown, click the line number. Update: On PC: F12 or Ctrl+Shift+I / On Mac: Cmd+Alt+I select "Sources" tab, select script from the file pane on the left, click the line number.

In Firefox use the Firebug extension: On PC and Mac: F12, "Script" tab, activate & reload if needed, select script from dropdown, click line number.

When your Javascript pauses at a breakpoint, both browsers offer you the usual debugging tools to single step through the code, inspect & change variable values, watch expressions,...

How to pause script execution in Developers console, While I haven't found the exact solution to this problem, I did come up with a one-​liner that can be put in a page (or pasted in the Javascript console) to achieve  Many programming languages have a sleep function that will delay a program’s execution for a given number of seconds. This functionality is absent from JavaScript, however, owing to its

As katspaugh mentions in their comment:


This only works for me from the Sources tab of the Developer Tools window in Chrome 59.0.3071.115 (on Mac OS X).

Chrome keyboard shortcut to pause script execution, Open up the Developer Tools (F12 or right click somewhere blank and click “​inspect”) Never did figure out why on earth the regular “Pause script execution” button Tags:developers console, inspector, Javascript, Pause, web development. Pause For Specified Time Period. We have another options where we can specify the time as seconds to wait. This will actually sleep the current running interactive process and wait for the given time. After the sleep period end the script will resume executing from point where it left.

You can write a pause code yourself. Pause javascript excution using debugger. In the chrome console, run:

window.addEventListener('keydown', function(event) { 
  if (event.defaultPrevented) {
    return; // Should do nothing if the default action has been cancelled
  let handled = false;
  if (event.keyCode == 123) {
    handled = true;
    debugger;  // 123 is the keyCode of F12
  if (handled) {
    // Suppress "double action" if event handled

Highlight element with inspector

Hit F12

How to Pause JavaScript - Chrome, By executing code one line or one function at a time, you can observe changes logging, as logged data is already stale the moment it arrives in the console. When you pause a script, the Scope pane shows you all of the  Pause and display the message "Press Enter to continue" Syntax pause. When the pause command is run, PowerShell will display the message "Press Enter to continue" and then halt any further execution until the user presses the ENTER key on the keyboard. In Windows CMD the PAUSE command displays the message "Press any key to continue . . ."

How To Pause Your Code With Breakpoints In Chrome DevTools, You are probably looking for the "F8" (Pause Script Execution) It will pause the execution (as long as the Developer Tools window is open). If you are writing a batch file and you don’t want to continue until somebody presses a key, you can do it really easy with the timeout command. For instance, using the following on the command prompt will pause the terminal for 10 seconds unless you press a key: timeout /t 10

How to step through your code, The JavaScript execution can be paused using a keyboard shortcut ( ⌘ + \ ). each circle's styles as you normally would in the developer tools. See Run JavaScript to explore more features related to running JavaScript in the Console. DevTools lets you pause a script in the middle of its execution. While you're paused, you can use the

Keyboard Shortcut to pause javascript execution, Turn on developer tools with F12 (Mac: Cmd+Opt+I ). While the code is paused​, we can examine current variables, execute commands in the console etc We can also pause the code by using the debugger command in it,  If you are using Maven and you want to skip the typing and prevent the console from close to see the result you need to use the CALL command in the script, besides just the 'mvn clean install'. Like this will close the console ECHO This is the wrong exemple mvn clean install pause Like this the console will stay open