zone.js
Version:
Zones for JavaScript
101 lines (100 loc) • 4.61 kB
JavaScript
;
/**
* @license Angular v<unknown>
* (c) 2010-2024 Google LLC. https://angular.io/
* License: MIT
*/
(function (factory) {
typeof define === 'function' && define.amd ? define(factory) :
factory();
})((function () {
'use strict';
/**
* @fileoverview
* @suppress {missingRequire}
*/
function patchFetch(Zone) {
Zone.__load_patch('fetch', function (global, Zone, api) {
var fetch = global['fetch'];
if (typeof fetch !== 'function') {
return;
}
var originalFetch = global[api.symbol('fetch')];
if (originalFetch) {
// restore unpatched fetch first
fetch = originalFetch;
}
var ZoneAwarePromise = global.Promise;
var symbolThenPatched = api.symbol('thenPatched');
var fetchTaskScheduling = api.symbol('fetchTaskScheduling');
var OriginalResponse = global.Response;
var placeholder = function () { };
var createFetchTask = function (source, data, originalImpl, self, args, ac) { return new Promise(function (resolve, reject) {
var task = Zone.current.scheduleMacroTask(source, placeholder, data, function () {
// The promise object returned by the original implementation passed into the
// function. This might be a `fetch` promise, `Response.prototype.json` promise,
// etc.
var implPromise;
var zone = Zone.current;
try {
zone[fetchTaskScheduling] = true;
implPromise = originalImpl.apply(self, args);
}
catch (error) {
reject(error);
return;
}
finally {
zone[fetchTaskScheduling] = false;
}
if (!(implPromise instanceof ZoneAwarePromise)) {
var ctor = implPromise.constructor;
if (!ctor[symbolThenPatched]) {
api.patchThen(ctor);
}
}
implPromise.then(function (resource) {
if (task.state !== 'notScheduled') {
task.invoke();
}
resolve(resource);
}, function (error) {
if (task.state !== 'notScheduled') {
task.invoke();
}
reject(error);
});
}, function () {
ac === null || ac === void 0 ? void 0 : ac.abort();
});
}); };
global['fetch'] = function () {
var args = Array.prototype.slice.call(arguments);
var options = args.length > 1 ? args[1] : {};
var signal = options === null || options === void 0 ? void 0 : options.signal;
var ac = new AbortController();
var fetchSignal = ac.signal;
options.signal = fetchSignal;
args[1] = options;
if (signal) {
var nativeAddEventListener = signal[Zone.__symbol__('addEventListener')] ||
signal.addEventListener;
nativeAddEventListener.call(signal, 'abort', function () {
ac.abort();
}, { once: true });
}
return createFetchTask('fetch', { fetchArgs: args }, fetch, this, args, ac);
};
if (OriginalResponse === null || OriginalResponse === void 0 ? void 0 : OriginalResponse.prototype) {
// https://fetch.spec.whatwg.org/#body-mixin
['arrayBuffer', 'blob', 'formData', 'json', 'text']
// Safely check whether the method exists on the `Response` prototype before patching.
.filter(function (method) { return typeof OriginalResponse.prototype[method] === 'function'; })
.forEach(function (method) {
api.patchMethod(OriginalResponse.prototype, method, function (delegate) { return function (self, args) { return createFetchTask("Response.".concat(method), undefined, delegate, self, args, undefined); }; });
});
}
});
}
patchFetch(Zone);
}));