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Viewing file:     browser.js (991 B)      -rw-r--r--

/* global WorkerGlobalScope */

function add(fn) {
    if (typeof WorkerGlobalScope === 'function' && self instanceof WorkerGlobalScope) {
        // this is run inside of a webworker
    } else {

        /**
         * if we are on react-native, there is no window.addEventListener
         * @link https://github.com/pubkey/unload/issues/6
         */
        if (typeof window.addEventListener !== 'function') return;

        /**
         * for normal browser-windows, we use the beforeunload-event
         */
        window.addEventListener('beforeunload', () => {
            fn();
        }, true);

        /**
         * for iframes, we have to use the unload-event
         * @link https://stackoverflow.com/q/47533670/3443137
         */
        window.addEventListener('unload', () => {
            fn();
        }, true);
    }

    /**
     * TODO add fallback for safari-mobile
     * @link https://stackoverflow.com/a/26193516/3443137
     */
}

export default {
    add
};