@mtdt.temp/browser-core/esm/tools/getZoneJsOriginalValue.js

Datadog browser core utilities.

import { getGlobalObject } from './getGlobalObject';
/**
 * Gets the original value for a DOM API that was potentially patched by Zone.js.
 *
 * Zone.js[1] is a library that patches a bunch of JS and DOM APIs. It usually stores the original
 * value of the patched functions/constructors/methods in a hidden property prefixed by
 * __zone_symbol__.
 *
 * In multiple occasions, we observed that Zone.js is the culprit of important issues leading to
 * browser resource exhaustion (memory leak, high CPU usage). This method is used as a workaround to
 * use the original DOM API instead of the one patched by Zone.js.
 *
 * [1]: https://github.com/angular/angular/tree/main/packages/zone.js
 */
export function getZoneJsOriginalValue(target, name) {
    const browserWindow = getGlobalObject();
    let original;
    if (browserWindow.Zone && typeof browserWindow.Zone.__symbol__ === 'function') {
        original = target[browserWindow.Zone.__symbol__(name)];
    }
    if (!original) {
        original = target[name];
    }
    return original;
}
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