BOOK: Object-Oriented JavaScript

Object-Oriented JavaScript – Second Edition
Stoyan Stefanov, Kumar Chetan Sharma
July 2013
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use the dev. tools of your browser. Press F12 on Windows or cmd-alt-i on Mac to open the dev. tools, then go to the console tab: this is where errors will be displayed, or messages of your own (use the console.log(string) JavaScript function in the JavaScript code embedded in your html page).
… Without such tools, debugging JavaScript code is impossible. So you need to look at some basic tutorials on how to use the dev. tools of your browsers, as the way they work differ one from another.

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