debugger Statement

debugger Statement (JavaScript)

 

Suspends execution.

debugger

You can place debugger statements anywhere in procedures to suspend execution. Using the debugger statement is similar to setting a breakpoint in the code.

The debugger statement suspends execution, but it does not close any files or clear any variables.

System_CAPS_noteNote

The debugger statement has no effect unless the script is being debugged.

This example uses the debugger statement to suspend execution for each iteration through the for loop.

System_CAPS_noteNote

To run this example, you must have a script debugger installed and the script must run in debug mode.

Internet Explorer 8 includes the JavaScript debugger. If you are using an earlier version of Internet Explorer, see How to: Enable and Start Script Debugging from Internet Explorer.

for(i = 1; i<5; i++) {
   // Print i to the Output window.
   Debug.write("loop index is " + i);
   // Wait for user to resume.
   debugger
}

Requirements

Supported in the following document modes: Quirks, Internet Explorer 6 standards, Internet Explorer 7 standards, Internet Explorer 8 standards, Internet Explorer 9 standards, Internet Explorer 10 standards, Internet Explorer 11 standards. Also supported in Store apps (Windows 8 and Windows Phone 8.1). See Version Information.

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