Registers an event listener in the global scope, which will be calledsynchronously whenever the event type is dispatched.

Shows the given message and waits for the enter key pressed.

Decodes a string of data which has been encoded using base-64 encoding.

Creates a base-64 ASCII encoded string from the input string.

Cancels a timed, repeating action which was previously started by a callto setInterval()

Cancels a scheduled action initiated by setTimeout()

Shows the given message and waits for the answer. Returns the user's answer as boolean.

Create a new ImageBitmap object from a given source.

Dispatches an event in the global scope, synchronously invoking anyregistered event listeners for this event in the appropriate order. Returnsfalse if event is cancelable and at least one of the event handlers whichhandled this event called Event.preventDefault(). Otherwise it returns true.

Fetch a resource from the network. It returns a Promise that resolves to theResponse to that Request, whether it is successful or not.

Shows the given message and waits for the user's input. Returns the user's input as string.

A microtask is a short function which is executed after the function ormodule which created it exits and only if the JavaScript execution stack isempty, but before returning control to the event loop being used to drive thescript's execution environment. This event loop may be either the main eventloop or the event loop driving a web worker.

Remove a previously registered event listener from the global scope

Dispatch an uncaught exception. Similar to a synchronous version of:

Repeatedly calls a function , with a fixed time delay between each call.

Sets a timer which executes a function once after the delay (in milliseconds) elapses. Returnsan id which may be used to cancel the timeout.

Creates a deep copy of a given value using the structured clone algorithm.

Specification

Options for arithmetic operations like add() and subtract()

Options for assigning fields using with() or entire objects withfrom().

Any of these types can be passed to Temporal methods instead of a calendar ID.

Options to control the result of until() and since() methods inTemporal types.

A Temporal.Duration represents an immutable duration of time which can beused in date/time arithmetic.

Options to control behavior of Duration.compare()

Options for assigning fields using Duration.prototype.with() or entireobjects with Duration.from(), and for arithmetic withDuration.prototype.add() and Duration.prototype.subtract().

The round method of the Temporal.Duration accepts one requiredparameter. If a string is provided, the resulting Temporal.Durationobject will be rounded to that unit. If an object is provided, thesmallestUnit and/or largestUnit property is required, while otherproperties are optional. A string parameter is treated the same as anobject whose smallestUnit property value is that string.

Options to control behavior of Duration.prototype.total()

A Temporal.Instant is an exact point in time, with a precision innanoseconds. No time zone or calendar information is present. Therefore,Temporal.Instant has no concept of days, months, or even hours.

The Temporal.Now object has several methods which give information aboutthe current date, time, and time zone.

A Temporal.PlainDate represents a calendar date. "Calendar date" refers to theconcept of a date as expressed in everyday usage, independent of any timezone. For example, it could be used to represent an event on a calendarwhich happens during the whole day no matter which time zone it's happeningin.

A Temporal.PlainDateTime represents a calendar date and wall-clock time, witha precision in nanoseconds, and without any time zone. Of the Temporalclasses carrying human-readable time information, it is the most generaland complete one. Temporal.PlainDate, Temporal.PlainTime, Temporal.PlainYearMonth,and Temporal.PlainMonthDay all carry less information and should be used whencomplete information is not required.

A Temporal.PlainMonthDay represents a particular day on the calendar, butwithout a year. For example, it could be used to represent a yearlyrecurring event, like "Bastille Day is on the 14th of July."

A Temporal.PlainTime represents a wall-clock time, with a precision innanoseconds, and without any time zone. "Wall-clock time" refers to theconcept of a time as expressed in everyday usage — the time that you readoff the clock on the wall. For example, it could be used to represent anevent that happens daily at a certain time, no matter what time zone.

A Temporal.PlainYearMonth represents a particular month on the calendar. Forexample, it could be used to represent a particular instance of a monthlyrecurring event, like "the June 2019 meeting".

When the name of a unit is provided to a Temporal API as a string, it isusually singular, e.g. 'day' or 'hour'. But plural unit names like 'days'or 'hours' are also accepted.

round methods take one required parameter. If a string is provided, theresulting Temporal.Duration object will be rounded to that unit. If anobject is provided, its smallestUnit property is required while otherproperties are optional. A string is treated the same as an object whosesmallestUnit property value is that string.

Any of these types can be passed to Temporal methods instead of a time zone ID.

Options for conversions of Temporal.PlainDateTime to Temporal.Instant

Options for outputting precision in toString() on types with seconds

Options to control behaviour of ZonedDateTime.prototype.getTimeZoneTransition()

The WebAssembly.compile() function compiles WebAssembly binary code into aWebAssembly.Module object. This function is useful if it is necessary to compilea module before it can be instantiated (otherwise, the WebAssembly.instantiate()function should be used).

The WebAssembly.CompileError object indicates an error during WebAssembly decoding or validation.

The WebAssembly.compileStreaming() function compiles a WebAssembly.Moduledirectly from a streamed underlying source. This function is useful if it isnecessary to a compile a module before it can be instantiated (otherwise, theWebAssembly.instantiateStreaming() function should be used).

A WebAssembly.Global object represents a global variable instance, accessible fromboth JavaScript and importable/exportable across one or more WebAssembly.Moduleinstances. This allows dynamic linking of multiple modules.

The GlobalDescriptor describes the options you can pass tonew WebAssembly.Global().

A WebAssembly.Instance object is a stateful, executable instance of a WebAssembly.Module.Instance objects contain all the Exported WebAssembly functions that allow calling intoWebAssembly code from JavaScript.

The WebAssembly.instantiate() function allows you to compile and instantiateWebAssembly code.

The WebAssembly.instantiateStreaming() function compiles and instantiates aWebAssembly module directly from a streamed underlying source. This is the mostefficient, optimized way to load wasm code.

The WebAssembly.LinkError object indicates an error during module instantiation(besides traps from the start function).

The WebAssembly.Memory object is a resizable ArrayBuffer or SharedArrayBuffer thatholds the raw bytes of memory accessed by a WebAssembly Instance.

The MemoryDescriptor describes the options you can pass tonew WebAssembly.Memory().

A WebAssembly.Module object contains stateless WebAssembly code that has already been compiledby the browser — this can be efficiently shared with Workers, and instantiated multiple times.

A ModuleExportDescriptor is the description of a declared export in aWebAssembly.Module.

A ModuleImportDescriptor is the description of a declared import in aWebAssembly.Module.

The WebAssembly.RuntimeError object is the error type that is thrown whenever WebAssemblyspecifies a trap.

The WebAssembly.Table() object is a JavaScript wrapper object — an array-like structurerepresenting a WebAssembly Table, which stores function references. A table created byJavaScript or in WebAssembly code will be accessible and mutable from both JavaScriptand WebAssembly.

The TableDescriptor describes the options you can pass tonew WebAssembly.Table().

The WebAssembly.validate() function validates a given typed array ofWebAssembly binary code, returning whether the bytes form a valid wasmmodule (true) or not (false).

The value returned from WebAssembly.instantiate.