mirror of
https://github.com/zhigang1992/react-native.git
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5e36b0c6eb
Summary: This adds https://github.com/mysticatea/abort-controller to polyfill [AbortController](https://developer.mozilla.org/en-US/docs/Web/API/AbortController). This is used to cancel requests when using `fetch`. This also updates `event-target-shim` to 5.0 to make sure we only have one version of this dependency. This updates required adding a polyfill for `console.assert` which is used by the new version. I made one based on https://github.com/gskinner/console-polyfill/blob/master/console.js#L74. The polyfill is very small, especially since we already use `event-target-shim` so I think it makes sense to include in core. Depends on #24418 so that the fetch polyfill supports the `signal` parameter. Fixes #18115 [General] [Added] - Add support for cancelling fetch requests with AbortController Pull Request resolved: https://github.com/facebook/react-native/pull/24419 Differential Revision: D14912858 Pulled By: cpojer fbshipit-source-id: 8a6402910398db51e2f3e3262f07aabdf68fcf72
59 lines
1.3 KiB
JavaScript
59 lines
1.3 KiB
JavaScript
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @format
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* @flow
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*/
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'use strict';
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const React = require('react');
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const {Alert, Button, View} = require('react-native');
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class XHRExampleAbortController extends React.Component<{}, {}> {
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_timeout: any;
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_submit(abortDelay) {
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clearTimeout(this._timeout);
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// eslint-disable-next-line no-undef
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const abortController = new AbortController();
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fetch('https://facebook.github.io/react-native/', {
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signal: abortController.signal,
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})
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.then(res => res.text())
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.then(res => Alert.alert(res))
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.catch(err => Alert.alert(err.message));
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this._timeout = setTimeout(() => {
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abortController.abort();
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}, abortDelay);
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}
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componentWillUnmount() {
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clearTimeout(this._timeout);
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}
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render() {
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return (
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<View>
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<Button
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title="Abort before response"
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onPress={() => {
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this._submit(0);
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}}
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/>
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<Button
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title="Abort after response"
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onPress={() => {
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this._submit(5000);
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}}
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/>
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</View>
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);
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}
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}
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module.exports = XHRExampleAbortController;
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