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Intl.getCanonicalLocales()

The Intl.getCanonicalLocales() method returns an array containing the canonical locale names. Duplicates will be omitted and elements will be validated as structurally valid language tags.
Internationalization Intl JavaScript Method

Map

The Map object is a simple key/value map. Any value (both objects and primitive values) may be used as either a key or a value.
ECMAScript6 JavaScript Map

get Map[@@species]

The Map[@@species] accessor property returns the Map constructor.
ECMAScript6 JavaScript Map Property

Map.prototype

The Map.prototype property represents the prototype for the Map constructor.
ECMAScript6 JavaScript Map Property

Map.prototype.size

The size accessor property returns the number of elements in a Map object.
ECMAScript6 JavaScript Map Property

Math

Math is a built-in object that has properties and methods for mathematical constants and functions. Not a function object.
JavaScript Math Reference

Math.abs()

The Math.abs() function returns the absolute value of a number, that is
JavaScript Math Method Reference

Math.acos()

The Math.acos() function returns the arccosine (in radians) of a number, that is
JavaScript Math Method Reference

Math.acosh()

The Math.acosh() function returns the hyperbolic arc-cosine of a number, that is
JavaScript Math Method Reference

Math.asin()

The Math.asin() function returns the arcsine (in radians) of a number, that is
JavaScript Math Method Reference

Math.asinh()

The Math.asinh() function returns the hyperbolic arcsine of a number, that is
JavaScript Math Method Reference

Math.atan()

The Math.atan() function returns the arctangent (in radians) of a number, that is
JavaScript Math Method Reference

Math.atan2()

The Math.atan2() function returns the arctangent of the quotient of its arguments.
JavaScript Math Method Reference

Math.atanh()

The Math.atanh() function returns the hyperbolic arctangent of a number, that is
JavaScript Math Method Reference

Math.cbrt()

The Math.cbrt() function returns the cube root of a number, that is
JavaScript Math Method Reference

Math.ceil()

The Math.ceil() function returns the smallest integer greater than or equal to a given number.
JavaScript Math Method Reference

Math.cos()

The Math.cos() function returns the cosine of a number.
JavaScript Math Method Reference

Math.cosh()

The Math.cosh() function returns the hyperbolic cosine of a number, that can be expressed using the constant e:
JavaScript Math Method Reference

Math.E

The Math.E property represents the base of natural logarithms, e, approximately 2.718.
JavaScript Math Property Reference

Math.exp()

The Math.exp() function returns ex, where x is the argument, and e is Euler's number (also known as Napier's constant), the base of the natural logarithms.
JavaScript Math Method Reference