This is the cheatsheet for the foundational concepts of JavaScript. Get to learn the fundamental concepts, syntax, terminologies and different constructs in JavaScript.

Bonus: One-Page DOM API cheatsheet on section 14.

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Download the full 13-page PDF

or Download individual pages:

• Page 1: Basic Vocabulary, Seven Types, Objects PNG, PDF
• Page 2: Functions - parameters, invocation, parameters, return and more. PNG, PDF
• Page 3: Vocabulary around variables and scope PNG, PDF
• Page 4: Operators and coercion PNG, PDF
• Page 5: Conditional Statement (if/switch/ternary) + Truthy Falsy PNG, PDF
• Page 6: Loops - For, While, Do While PNG, PDF
• Page 7: Ways to create variable - var, let, const + Event Loop PNG, PDF
• Page 8: Browser PNG, PDF
• Page 9: DOM - Query, Create, Update, Delete, Events of DOM PNG, PDF
• Page 10: Auto-inherited properties + built-in objects PNG, PDF
• Page 11: Promise and Async Tasks PNG, PDF
• Page 12: 'this' keyword and 3 scenarios to remember PNG, PDF
• Page 13: Constructors - Custom and built-in constructors PNG, PDF

• August 2020: Reference added on page 1 for var, let and const
• Nov 16, 2018: Added page 10-13 to the cheatsheet Topics added:
  • Page 10: Auto-inherited properties + built-in objects
  • Page 11: Promise and Async Tasks
  • Page 12: 'this' keyword and 3 scenarios to remember
  • Page 13: Constructors - Custom and built-in constructors
• Oct 25, 2018: Launched 9-page cheatsheet

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