The Uint32Array typed array represents an array of 32-bit unsigned integers in the platform byte order. If control over byte order is needed, use DataView instead. The contents are initialized to 0. Once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).

Constructor JavaScript TypedArray TypedArrays

The SIMD.Uint32x4 data type is a 128-bit vector divided into 4 lanes storing 32-bit unsigned integer values.

Experimental JavaScript SIMD

The SIMD.Uint8x16 data type is a 128-bit vector divided into 16 lanes storing 8-bit unsigned integer values.

Experimental JavaScript SIMD

The WeakMap object is a collection of key/value pairs in which the keys are weakly referenced.  The keys must be objects and the values can be arbitrary values.

ECMAScript6 JavaScript WeakMap

The WeakMap.prototype property represents the prototype for the WeakMap constructor.

ECMAScript6 JavaScript Property WeakMap

The WeakSet object lets you store weakly held objects in a collection.

ECMAScript6 JavaScript WeakSet

The WeakSet.prototype property represents the prototype for the WeakSet constructor.

ECMAScript6 JavaScript Property WeakSet

Arithmetic operators take numerical values (either literals or variables) as their operands and return a single numerical value. The standard arithmetic operators are addition (+), subtraction (-), multiplication (*), and division (/).

JavaScript Operator operator

Arithmetic operators take numerical values (either literals or variables) as their operands and return a single numerical value. The standard arithmetic operators are addition (+), subtraction (-), multiplication (*), and division (/).

JavaScript operator Operator

An assignment operator assigns a value to its left operand based on the value of its right operand.

JavaScript operator Operator

Bitwise operators treat their operands as a sequence of 32 bits (zeroes and ones), rather than as decimal, hexadecimal, or octal numbers. For example, the decimal number nine has a binary representation of 1001. Bitwise operators perform their operations on such binary representations, but they return standard JavaScript numerical values.

JavaScript Operator operator Reference

The comma operator evaluates each of its operands (from left to right) and returns the value of the last operand.

JavaScript Operator operator

JavaScript has both strict and type–converting comparisons. A strict comparison (e.g., ===) is only true if the operands are of the same type and the contents match. The more commonly-used abstract comparison (e.g. ==) converts the operands to the same type before making the comparison. For relational abstract comparisons (e.g., <=), the operands are first converted to primitives, then to the same type, before comparison.

JavaScript Operator operator Reference

The conditional (ternary) operator is the only JavaScript operator that takes three operands. This operator is frequently used as a shortcut for the if statement.

JavaScript operator Operator

Expression closures are a shorthand function syntax for writing simple functions.

Functions JavaScript Reference

Logical operators are typically used with Boolean (logical) values. When they are, they return a Boolean value. However, the && and || operators actually return the value of one of the specified operands, so if these operators are used with non-Boolean values, they may return a non-Boolean value.

JavaScript operator Operator

The new.target property lets you detect whether a function or constructor was called using the new operator. In constructors and functions instantiated with the new operator, new.target returns a reference to the constructor or function. In normal function calls, new.target is undefined.

Classes ECMAScript6 JavaScript Reference

Operator precedence determines the order in which operators are evaluated. Operators with higher precedence are evaluated first.

JavaScript Operator operator precedence

Property accessors provide access to an object's properties by using the dot notation or the bracket notation.

JavaScript operator Operator

The typeof operator returns a string indicating the type of the unevaluated operand.

JavaScript Operator operator Unary