26 lessons found
Understand the role JavaScript plays alongside HTML and CSS, and where it can run.
Open your browser console and write real JavaScript — no setup required.
Learn the grammar rules of JavaScript — statements, comments, and naming conventions.
Learn the three ways to create variables and understand why modern JavaScript only uses two of them.
Discover the core types of values in JavaScript and when to use each one.
See how JavaScript quietly converts types behind the scenes, and learn to inspect types yourself.
Perform calculations and compare values using JavaScript's built-in operators.
Discover what the JavaScript engine builds before running even one line of your code.
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