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Fix globals, part 11:
fetch() (#33643)
* move & add docs * update groupdata * Apply suggestions from code review Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com> * update * update * simply examples section * sync * Update index.md * Apply suggestions from code review Co-authored-by: Brian Thomas Smith <brian@smith.berlin> --------- Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com> Co-authored-by: Brian Thomas Smith <brian@smith.berlin>
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,75 @@ | ||
| --- | ||
| title: "WorkerGlobalScope: fetch() method" | ||
| short-title: fetch() | ||
| slug: Web/API/WorkerGlobalScope/fetch | ||
| page-type: web-api-instance-method | ||
| browser-compat: api.fetch | ||
| --- | ||
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| {{APIRef("Fetch API")}} | ||
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| The **`fetch()`** method of the {{domxref("WorkerGlobalScope")}} interface starts the process of fetching a resource from the network, returning a promise that is fulfilled once the response is available. | ||
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| The promise resolves to the {{domxref("Response")}} object representing the response to your request. | ||
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| A `fetch()` promise only rejects when the request fails, for example, because of a badly-formed request URL or a network error. | ||
| A `fetch()` promise _does not_ reject if the server responds with HTTP status codes that indicate errors (`404`, `504`, etc.). | ||
| Instead, a `then()` handler must check the {{domxref("Response.ok")}} and/or {{domxref("Response.status")}} properties. | ||
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| The `fetch()` method is controlled by the `connect-src` directive of [Content Security Policy](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy) rather than the directive of the resources it's retrieving. | ||
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| > **Note:** The `fetch()` method's parameters are identical to those of the {{domxref("Request.Request","Request()")}} constructor. | ||
| ## Syntax | ||
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| ```js-nolint | ||
| fetch(resource) | ||
| fetch(resource, options) | ||
| ``` | ||
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| ### Parameters | ||
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| - `resource` | ||
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| - : This defines the resource that you wish to fetch. This can either be: | ||
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| - A string or any other object with a {{Glossary("stringifier")}} — including a {{domxref("URL")}} object — that provides the URL of the resource you want to fetch. The URL may be relative to the base URL, which is the document's {{domxref("Node.baseURI", "baseURI")}} in a window context, or {{domxref("WorkerGlobalScope.location")}} in a worker context. | ||
| - A {{domxref("Request")}} object. | ||
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| - `options` {{optional_inline}} | ||
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| - : A {{domxref("RequestInit")}} object containing any custom settings that you want to apply to the request. | ||
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| ### Return value | ||
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| A {{jsxref("Promise")}} that resolves to a {{domxref("Response")}} object. | ||
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| ### Exceptions | ||
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| - `AbortError` {{domxref("DOMException")}} | ||
| - : The request was aborted due to a call to the {{domxref("AbortController")}} {{domxref("AbortController.abort", "abort()")}} method. | ||
| - `NotAllowedError` {{domxref("DOMException")}} | ||
| - : Thrown if use of the [Topics API](/en-US/docs/Web/API/Topics_API) is specifically disallowed by a {{httpheader('Permissions-Policy/browsing-topics','browsing-topics')}} [Permissions Policy](/en-US/docs/Web/HTTP/Permissions_Policy), and a `fetch()` request was made with `browsingTopics: true`. | ||
| - {{jsxref("TypeError")}} | ||
| - : An error when the fetch operation could not be performed. | ||
| See {{domxref("Window.fetch()")}} exceptions for a list of reasons why this error can occur. | ||
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| ## Examples | ||
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| See {{domxref("Window.fetch", "fetch()")}} for examples. | ||
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| ## Specifications | ||
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| {{Specifications}} | ||
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| ## Browser compatibility | ||
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| {{Compat}} | ||
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| ## See also | ||
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| - {{domxref("Window.fetch()")}} | ||
| - [Fetch API](/en-US/docs/Web/API/Fetch_API) | ||
| - [ServiceWorker API](/en-US/docs/Web/API/Service_Worker_API) | ||
| - [HTTP access control (CORS)](/en-US/docs/Web/HTTP/CORS) | ||
| - [HTTP](/en-US/docs/Web/HTTP) |
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