Writing to the Firebug console [edit]

This page describes how to add code to write messages to the Firebug console.

Contents

Introduction

Use the Firebug console to log information about a web page.

Instructions

Writing to the console

To write messages to the Firebug console:

  1. In the lower right corner of Firefox, click the Firebug button Image:iconFirebug.png to start Firebug.
  2. Click the Image:iconFirebugConsole.png tab to view the Console tab.
  3. Place your cursor on the command line (shown below) and type one of the console commands (described below).

    Image:firebugCommandLine.png

  4. Press the Return key on your keyboard to execute the command.

Console commands

Firebug recognizes a number of commands in addition to console.log. See http://www.getfirebug.com/console.html for a complete list of commands.

console.log

Use console.log to write any message to the console. You may use either of the following formats:

console.log("Hello", postman, "!");

which displays as

Hello Newman!

or

console.log("Hello %s!", postman);

which also displays as

Hello Newman!

You can use the following characters to format your log message output:

See http://www.getfirebug.com/console.html for a full list of console API commands for Firebug.

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