The following table lists JavaScript functions.
Syntax Functions Function Description JavaScript object abs Function Returns the absolute value of a number. Math acos Function Returns the arccosine of a number. Math asin Function Returns the arcsine of a number. Math atan Function Returns the arctangent of a number. Math atan2 Function Returns the angle (in radians) from the X axis to a point (y,x). Math ceil Function Returns the smallest integer greater than or equal to its numeric argument. Math cos Function Returns the cosine of a number. Math create Function Creates an object that has a specified prototype, and that optionally contains specified properties. Object decodeURI Function Returns the unencoded version of an encoded Uniform Resource Identifier. Global decodeURIComponent Function Returns the unencoded version of an encoded component of a Uniform Resource Identifier. Global defineProperties Function Adds one or more properties to an object, and/or modifies attributes of existing properties. Object defineProperty Function Adds a property to an object, or modifies attributes of an existing property. Object encodeURI Function Encodes a text string as a valid Uniform Resource Identifier. Global encodeURIComponent Function Encodes a text string as a valid component of a Uniform Resource Identifier. Global escape Function Encodes String objects so they can be read on all computers. Global eval Function Evaluates JavaScript code and executes it. Global exp Function Returns e (the base of natural logarithms) raised to a power. Math floor Function Returns the greatest integer less than or equal to its numeric argument. Math freeze Function Prevents the modification of existing property attributes and values, and prevents the addition of new properties. Object fromCharCode Function Returns a string from a number of Unicode character values. String getOwnPropertyDescriptor Function Returns the definition of a data property or an accessor property. Object getOwnPropertyNames Function Returns the names of the properties and methods of an object. Object getPrototypeOf Function Returns the prototype of an object. Object isArray Function Returns a Boolean value that indicates whether an object is an array. Array isExtensible Function Returns a value that indicates whether new properties can be added to an object. Object isFinite Function Returns a Boolean value that indicates if a supplied number is finite. Global isFrozen Function Returns true if existing property attributes and values cannot be modified in an object and new properties cannot be added to the object. Object isNaN Function Returns a Boolean value that indicates whether a value is the reserved value NaN (not a number). Global isSealed Function Returns true if existing property attributes cannot be modified in an object and new properties cannot be added to the object. Object keys Function Returns the names of the enumerable properties and methods of an object. Object log Function Returns the natural logarithm of a number. Math max Function Returns the greater of two supplied numeric expressions. Math min Function Returns the lesser of two supplied numbers. Math now Function Returns the number of milliseconds between January 1, 1970, and the current date and time. Date parse Function (Date) Parses a string containing a date, and returns the number of milliseconds between that date and midnight, January 1, 1970. Date parse Function (JSON) De-serializes JSON text to produce an in-memory object or array. JSON parseFloat Function Returns a floating-point number converted from a string. Global parseInt Function Returns an integer converted from a string. Global pow Function Returns the value of a base expression raised to a specified power. Math preventExtensions Function Prevents the addition of new properties to an object. Object random Function Returns a pseudorandom number between 0 and 1. Math round Function Returns a specified numeric expression rounded to the nearest integer. Math seal Function Prevents the modification of attributes of existing properties, and prevents the addition of new properties. Object sin Function Returns the sine of a number. Math sqrt Function Returns the square root of a number. Math stringify Function Serializes an object or array into JavaScript Object Notation (JSON) text. JSON tan Function Returns the tangent of a number. Math unescape Function Decodes String objects encoded with the escape method. Global UTC Function Returns the number of milliseconds between midnight, January 1, 1970 Universal Coordinated Time (UTC) (or GMT) and the supplied date. Date See also Other articlesMicrosoft Developer Network: Article
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