deno/ext/web

deno web

Implements timers, as well as the following APIs:

• Event
• TextEncoder
• TextDecoder
• File (Spec: https://w3c.github.io/FileAPI)

Note: Testing for text encoding is done via WPT in cli/.

Usage Example

From javascript, include the extension's source:

import * as infra from "ext:deno_web/00_infra.js";
import * as DOMException from "ext:deno_web/01_dom_exception.js";
import * as mimesniff from "ext:deno_web/01_mimesniff.js";
import * as event from "ext:deno_web/02_event.js";
import * as structuredClone from "ext:deno_web/02_structured_clone.js";
import * as timers from "ext:deno_web/02_timers.js";
import * as abortSignal from "ext:deno_web/03_abort_signal.js";
import * as globalInterfaces from "ext:deno_web/04_global_interfaces.js";
import * as base64 from "ext:deno_web/05_base64.js";
import * as streams from "ext:deno_web/06_streams.js";
import * as encoding from "ext:deno_web/08_text_encoding.js";
import * as file from "ext:deno_web/09_file.js";
import * as fileReader from "ext:deno_web/10_filereader.js";
import * as location from "ext:deno_web/12_location.js";
import * as messagePort from "ext:deno_web/13_message_port.js";
import * as compression from "ext:deno_web/14_compression.js";
import * as performance from "ext:deno_web/15_performance.js";
import * as imageData from "ext:deno_web/16_image_data.js";

Then assign the properties below to the global scope like this example:

Object.defineProperty(globalThis, "AbortController", {
  value: abortSignal.AbortController,
  enumerable: false,
  configurable: true,
  writable: true,
});

Name	Value	enumerable	configurable	writeable
AbortController	abortSignal.AbortController	false	true	true
AbortSignal	abortSignal.AbortSignal	false	true	true
Blob	file.Blob	false	true	true
ByteLengthQueuingStrategy	streams.ByteLengthQueuingStrategy
CloseEvent	event.CloseEvent	false	true	true
CompressionStream	compression.CompressionStream	false	true	true
CountQueuingStrategy	streams.CountQueuingStrategy
CustomEvent	event.CustomEvent	false	true	true
DecompressionStream	compression.DecompressionStream	false	true	true
DOMException	DOMException	false	true	true
ErrorEvent	event.ErrorEvent	false	true	true
Event	event.Event	false	true	true
EventTarget	event.EventTarget	false	true	true
File	file.File	false	true	true
FileReader	fileReader.FileReader	false	true	true
MessageEvent	event.MessageEvent	false	true	true
Performance	performance.Performance	false	true	true
PerformanceEntry	performance.PerformanceEntry	false	true	true
PerformanceMark	performance.PerformanceMark	false	true	true
PerformanceMeasure	performance.PerformanceMeasure	false	true	true
PromiseRejectionEvent	event.PromiseRejectionEvent	false	true	true
ProgressEvent	event.ProgressEvent	false	true	true
ReadableStream	streams.ReadableStream	false	true	true
ReadableStreamDefaultReader	streams.ReadableStreamDefaultReader
TextDecoder	encoding.TextDecoder	false	true	true
TextEncoder	encoding.TextEncoder	false	true	true
TextDecoderStream	encoding.TextDecoderStream	false	true	true
TextEncoderStream	encoding.TextEncoderStream	false	true	true
TransformStream	streams.TransformStream	false	true	true
MessageChannel	messagePort.MessageChannel	false	true	true
MessagePort	messagePort.MessagePort	false	true	true
WritableStream	streams.WritableStream	false	true	true
WritableStreamDefaultWriter	streams.WritableStreamDefaultWriter
WritableStreamDefaultController	streams.WritableStreamDefaultController
ReadableByteStreamController	streams.ReadableByteStreamController
ReadableStreamBYOBReader	streams.ReadableStreamBYOBReader
ReadableStreamBYOBRequest	streams.ReadableStreamBYOBRequest
ReadableStreamDefaultController	streams.ReadableStreamDefaultController
TransformStreamDefaultController	streams.TransformStreamDefaultController
ImageData	imageData.ImageData	false	true	true
atob	base64.atob	true	true	true
btoa	base64.btoa	true	true	true
clearInterval	timers.clearInterval	true	true	true
clearTimeout	timers.clearTimeout	true	true	true
performance	performance.performance	true	true	true
reportError	event.reportError	true	true	true
setInterval	timers.setInterval	true	true	true
setTimeout	timers.setTimeout	true	true	true
structuredClone	messagePort.structuredClone	true	true	true

Then from rust, provide: deno_web::deno_web::init_ops_and_esm::<Permissions>(Arc<BlobStore>, Option<Url>) in the extensions field of your RuntimeOptions

Where:

• Permissions is a struct implementing deno_web::TimersPermission
• Arc<BlobStore> can be provided by Default::default()
• Option<Url> provides an optional base URL for certain ops

Dependencies

• deno_webidl: Provided by the deno_webidl crate
• deno_console: Provided by the deno_console crate
• deno_url: Provided by the deno_url crate

Provided ops

Following ops are provided, which can be accessed through Deno.ops:

• op_base64_decode
• op_base64_encode
• op_base64_atob
• op_base64_btoa
• op_encoding_normalize_label
• op_encoding_decode_single
• op_encoding_decode_utf8
• op_encoding_new_decoder
• op_encoding_decode
• op_encoding_encode_into
• op_blob_create_part
• op_blob_slice_part
• op_blob_read_part
• op_blob_remove_part
• op_blob_create_object_url
• op_blob_revoke_object_url
• op_blob_from_object_url
• op_message_port_create_entangled
• op_message_port_post_message
• op_message_port_recv_message
• op_message_port_recv_message_sync
• op_compression_new
• op_compression_write
• op_compression_finish
• op_now
• op_defer
• op_transfer_arraybuffer
• op_readable_stream_resource_allocate
• op_readable_stream_resource_allocate_sized
• op_readable_stream_resource_get_sink
• op_readable_stream_resource_write_error
• op_readable_stream_resource_write_buf
• op_readable_stream_resource_write_sync
• op_readable_stream_resource_close
• op_readable_stream_resource_await_close