This part of the JavaScript section on MDN serves as a repository of facts about the JavaScript language. Read more about this reference.
JavaScript reference
Built-ins
JavaScript standard built-in objects, along with their methods and properties.
Value properties
Function properties
Fundamental objects
Error objects
Numbers & dates
Text processing
Indexed Collections
Keyed collections
Structured data
Memory management
Control abstraction
Reflection
Internationalization
WebAssembly
Statements
Control flow
Declarations
Functions and classes
Iterations
Other
Expressions and operators
Primary expressions
Left-hand-side expressions
Increment & decrement
Unary operators
Arithmetic operators
Relational operators
Equality operators
Bitwise shift operators
Binary bitwise operators
Binary logical operators
Conditional (ternary) operator
Assignment operators
Comma operators
Functions
This chapter documents how to work with JavaScript functions to develop your applications.
Additional reference pages
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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference
