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JavaScript Basics

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Debug JavaScript in the Console

5:52 with Guil Hernandez

Learn how to identify and fix a problem in a program using the JavaScript console. This error-fixing skill will help assist you as you pick up the syntax of the language.

Chrome Console Keyboard Shortcuts

  • Windows: Ctrl + Shift + J
  • Mac: Cmd + Option + J

Firefox Console Keyboard Shortcuts

  • Windows: Ctrl + Shift + K
  • Mac: Cmd + Option + K

Internet Explorer Console Keyboard Shortcuts

  • F12 key

Safari Console Keyboard Shortcuts

  • Cmd + Option + C

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    you'll find out really fast that it's easy to make a mistake. 0:00
    Like most developers, you'll probably make lots of mistakes. 0:01
    You'll find that most of the mistakes you'll make in the beginning will be 0:04
    simple typing errors, like leaving off a quote mark or 0:07
    mistyping a command like alert. 0:09
    These types of errors are common, but they're often hard to spot and 0:11
    could prevent your entire program from running. 0:14
    Finding and fixing problems is a big part of programming. 0:17
    Fortunately, browsers provide tools that help you find mistakes so 0:21
    you can fix your programs. 0:24
    The most important is the JavaScript console which, besides printing useful 0:26

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