Worker()
constructor creates a
Worker
object that executes the script at the specified URL. This script must obey the
same-origin policy
.
注意 : that there is a disagreement among browser manufacturers about whether a data URI is of the same origin or not. Though Gecko 10.0 (Firefox 10.0 / Thunderbird 10.0 / SeaMonkey 2.7) and later accept data URIs, that's not the case in all other browsers.
var myWorker = new Worker(aURL, options);
USVString
representing the URL of the script the worker will execute. It must obey the same-origin policy.
type
: A
DOMString
specifying the type of worker to create. The value can be
classic
or
模块
. If not specified, the default used is
classic
.
credentials
: A
DOMString
specifying the type of credentials to use for the worker. The value can be
omit
,
same-origin
，或
包括
. If not specified, or if type is
classic
, the default used is
omit
(no credentials required).
名称
: A
DOMString
specifying an identifying name for the
DedicatedWorkerGlobalScope
representing the scope of the worker, which is mainly useful for debugging purposes.
SecurityError
is raised if the document is not allowed to start workers, e.g. if the URL has an invalid syntax or if the same-origin policy is violated.
NetworkError
is raised if the MIME type of the worker script is incorrect. It should always be
text/javascript
.
SyntaxError
被引发若
aUR
L
无法剖析。
The following code snippet shows creation of a
Worker
对象使用
Worker()
constructor and subsequent usage of the object:
var myWorker = new Worker('worker.js');
first.onchange = function() {
myWorker.postMessage([first.value,second.value]);
console.log('Message posted to worker');
}
For a full example, see our Basic dedicated worker example ( run dedicated worker ).
| 规范 | 状态 | 注释 |
|---|---|---|
|
HTML 实时标准
The definition of 'Worker()' in that specification. |
实时标准 |
| 桌面 | 移动 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Worker()
构造函数
|
Chrome 4 | Edge 12 | Firefox 3.5 | IE 10 | Opera 10.6 | Safari 4 | WebView Android 4 | Chrome Android 18 | Firefox Android 4 | Opera Android 11 | Safari iOS 5.1 | Samsung Internet Android 1.0 |
| Support for ECMAScript modules | Chrome 80 | Edge 80 | Firefox No | IE No | Opera 67 | Safari No | WebView Android 80 | Chrome Android 80 | Firefox Android No | Opera Android 57 | Safari iOS No | Samsung Internet Android No |
| Strict MIME type checks for worker scripts | Chrome ? | Edge ? | Firefox 70 | IE No | Opera ? | Safari ? | WebView Android ? | Chrome Android ? | Firefox Android No | Opera Android ? | Safari iOS ? | Samsung Internet Android ? |
构造函数
名称
option
|
Chrome 70 | Edge 18 | Firefox 55 | IE No | Opera 57 |
Safari
No
|
WebView Android No | Chrome Android 70 | Firefox Android 55 | Opera Android 49 |
Safari iOS
No
|
Samsung Internet Android 10.0 |
构造函数
type
option
|
Chrome 80 | Edge 80 | Firefox No | IE No | Opera 67 | Safari No | WebView Android 80 | Chrome Android 80 | Firefox Android No | Opera Android 57 | Safari iOS No | Samsung Internet Android No |
完整支持
不支持
兼容性未知
见实现注意事项。
注意
: A browser can be marked as providing full support for
Worker()
even though it does not support worker scripts written as modules. As of Mar 1, 2019, only
Chrome 80+
supports this feature, while
Firefox has an open feature request
. No other browsers are known to have support for production usage of worker scripts written as modules. Without that support, worker scripts written as modules and modules used by worker scripts have to be transpiled or otherwise converted to non-module code in order to run.
Worker
interface it belongs to.
Worker
Worker()