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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
/// <reference no-default-lib="true" />
/// <reference lib="esnext" />
declare class DOMException extends Error {
constructor(message?: string, name?: string);
readonly name: string;
readonly message: string;
}
interface EventInit {
bubbles?: boolean;
cancelable?: boolean;
composed?: boolean;
}
/** An event which takes place in the DOM. */
declare class Event {
constructor(type: string, eventInitDict?: EventInit);
/** Returns true or false depending on how event was initialized. True if
* event goes through its target's ancestors in reverse tree order, and
* false otherwise. */
readonly bubbles: boolean;
cancelBubble: boolean;
/** Returns true or false depending on how event was initialized. Its return
* value does not always carry meaning, but true can indicate that part of the
* operation during which event was dispatched, can be canceled by invoking
* the preventDefault() method. */
readonly cancelable: boolean;
/** Returns true or false depending on how event was initialized. True if
* event invokes listeners past a ShadowRoot node that is the root of its
* target, and false otherwise. */
readonly composed: boolean;
/** Returns the object whose event listener's callback is currently being
* invoked. */
readonly currentTarget: EventTarget | null;
/** Returns true if preventDefault() was invoked successfully to indicate
* cancellation, and false otherwise. */
readonly defaultPrevented: boolean;
/** Returns the event's phase, which is one of NONE, CAPTURING_PHASE,
* AT_TARGET, and BUBBLING_PHASE. */
readonly eventPhase: number;
/** Returns true if event was dispatched by the user agent, and false
* otherwise. */
readonly isTrusted: boolean;
/** Returns the object to which event is dispatched (its target). */
readonly target: EventTarget | null;
/** Returns the event's timestamp as the number of milliseconds measured
* relative to the time origin. */
readonly timeStamp: number;
/** Returns the type of event, e.g. "click", "hashchange", or "submit". */
readonly type: string;
/** Returns the invocation target objects of event's path (objects on which
* listeners will be invoked), except for any nodes in shadow trees of which
* the shadow root's mode is "closed" that are not reachable from event's
* currentTarget. */
composedPath(): EventTarget[];
/** If invoked when the cancelable attribute value is true, and while
* executing a listener for the event with passive set to false, signals to
* the operation that caused event to be dispatched that it needs to be
* canceled. */
preventDefault(): void;
/** Invoking this method prevents event from reaching any registered event
* listeners after the current one finishes running and, when dispatched in a
* tree, also prevents event from reaching any other objects. */
stopImmediatePropagation(): void;
/** When dispatched in a tree, invoking this method prevents event from
* reaching any objects other than the current object. */
stopPropagation(): void;
readonly AT_TARGET: number;
readonly BUBBLING_PHASE: number;
readonly CAPTURING_PHASE: number;
readonly NONE: number;
static readonly AT_TARGET: number;
static readonly BUBBLING_PHASE: number;
static readonly CAPTURING_PHASE: number;
static readonly NONE: number;
}
/**
* EventTarget is a DOM interface implemented by objects that can receive events
* and may have listeners for them.
*/
declare class EventTarget {
/** Appends an event listener for events whose type attribute value is type.
* The callback argument sets the callback that will be invoked when the event
* is dispatched.
*
* The options argument sets listener-specific options. For compatibility this
* can be a boolean, in which case the method behaves exactly as if the value
* was specified as options's capture.
*
* When set to true, options's capture prevents callback from being invoked
* when the event's eventPhase attribute value is BUBBLING_PHASE. When false
* (or not present), callback will not be invoked when event's eventPhase
* attribute value is CAPTURING_PHASE. Either way, callback will be invoked if
* event's eventPhase attribute value is AT_TARGET.
*
* When set to true, options's passive indicates that the callback will not
* cancel the event by invoking preventDefault(). This is used to enable
* performance optimizations described in § 2.8 Observing event listeners.
*
* When set to true, options's once indicates that the callback will only be
* invoked once after which the event listener will be removed.
*
* The event listener is appended to target's event listener list and is not
* appended if it has the same type, callback, and capture. */
addEventListener(
type: string,
listener: EventListenerOrEventListenerObject | null,
options?: boolean | AddEventListenerOptions,
): void;
/** Dispatches a synthetic event event to target and returns true if either
* event's cancelable attribute value is false or its preventDefault() method
* was not invoked, and false otherwise. */
dispatchEvent(event: Event): boolean;
/** Removes the event listener in target's event listener list with the same
* type, callback, and options. */
removeEventListener(
type: string,
callback: EventListenerOrEventListenerObject | null,
options?: EventListenerOptions | boolean,
): void;
[Symbol.toStringTag]: string;
}
interface EventListener {
(evt: Event): void | Promise<void>;
}
interface EventListenerObject {
handleEvent(evt: Event): void | Promise<void>;
}
declare type EventListenerOrEventListenerObject =
| EventListener
| EventListenerObject;
interface AddEventListenerOptions extends EventListenerOptions {
once?: boolean;
passive?: boolean;
}
interface EventListenerOptions {
capture?: boolean;
}
/** Decodes a string of data which has been encoded using base-64 encoding.
*
* console.log(atob("aGVsbG8gd29ybGQ=")); // outputs 'hello world'
*/
declare function atob(s: string): string;
/** Creates a base-64 ASCII encoded string from the input string.
*
* console.log(btoa("hello world")); // outputs "aGVsbG8gd29ybGQ="
*/
declare function btoa(s: string): string;
declare class TextDecoder {
/** Returns encoding's name, lowercased. */
readonly encoding: string;
/** Returns `true` if error mode is "fatal", and `false` otherwise. */
readonly fatal: boolean;
/** Returns `true` if ignore BOM flag is set, and `false` otherwise. */
readonly ignoreBOM = false;
constructor(
label?: string,
options?: { fatal?: boolean; ignoreBOM?: boolean },
);
/** Returns the result of running encoding's decoder. */
decode(input?: BufferSource, options?: { stream?: false }): string;
readonly [Symbol.toStringTag]: string;
}
declare class TextEncoder {
/** Returns "utf-8". */
readonly encoding = "utf-8";
/** Returns the result of running UTF-8's encoder. */
encode(input?: string): Uint8Array;
encodeInto(
input: string,
dest: Uint8Array,
): { read: number; written: number };
readonly [Symbol.toStringTag]: string;
}
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