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JavaScript Fundamentals

Learn JavaScript the practical way: types, functions, arrays, the DOM and async code

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  1. 1

    JavaScript Variables, Data Types and Functions Explained

    5-stop ride5 min read

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  2. 2

    JavaScript Objects, Arrays and Array Methods (map, filter, reduce)

    5-stop ride5 min read

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  3. 3

    JavaScript DOM and Events: Select, Update and Respond to Clicks

    5-stop ride6 min read

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  4. 4

    JavaScript Promises, async/await and fetch Explained

    5-stop ride5 min read

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Each ride has 5 stops: read the trick, answer the question, ride on. Pass with 3 of 5 correct (1 star), 4 for 2 stars, all 5 for 3 stars. Progress is saved in this browser. Prefer to read first? Open the reading version of JavaScript Fundamentals.