JavaScript debugger

With the debugger turned on, this code should stop executing before the third line:

let x = 15 * 5;
debugger;
document.getElementbyId("demo").innerHTML = x;

Description

The debugger statement stops the execution of JavaScript, and calls the debugger.

If no debugging is available, the debugger statement has no effect.

Read our JavaScript Debugging Tutorial for more information about how to activate debugging if your browser.

Normally, you activate debugging in your browser with the F12 key, and select "Console" in the debugger menu.

debugger;

debugger is an ECMAScript1 (ES1) feature.

ES1 (JavaScript 1997) is fully supported in all browsers:


Chrome	Edge	Firefox	Safari	Opera	IE
Yes	Yes	Yes	Yes	Yes	Yes