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OpenLayers 3 : Beginner's Guide by Erik Hazzard, Paul Spencer, Thomas Gratier

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Time for action – executing code in the Console

We will do some basic JavaScript coding via the Chrome DevTools console; specifically, just calling a built-in the alert() function to display an alert.

  1. Open up Chrome. It doesn't matter at this point which website (if any) you go to, since we will be writing a standalone code.
  2. Open up Chrome DevTools by going through the menu. Go to the Console panel.
  3. Now, at the bottom of your screen, you'll see an area where you can enter code, designated by >. Clicking anywhere after this will allow you to enter the code.
  4. Type in the following code, and then hit Enter:
    alert('Packt publishing loves open source. You want to write? See http://authors.packtpub.com');
  5. You should see an alert box pop-up with the text

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