react-native-webview-comlink/lib/web/polyfill.js

Add JavaScript interface for react-native-webview, based on Comlink

// Object.assign
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign
if (typeof Object.assign !== 'function') {
    // Must be writable: true, enumerable: false, configurable: true
    Object.defineProperty(Object, 'assign', {
        value: function assign(target, varArgs) {
            // .length of function is 2
            'use strict';
            if (target === null || target === undefined) {
                throw new TypeError('Cannot convert undefined or null to object');
            }
            var to = Object(target);
            for (var index = 1; index < arguments.length; index++) {
                var nextSource = arguments[index];
                if (nextSource !== null && nextSource !== undefined) {
                    for (var nextKey in nextSource) {
                        // Avoid bugs when hasOwnProperty is shadowed
                        if (Object.prototype.hasOwnProperty.call(nextSource, nextKey)) {
                            to[nextKey] = nextSource[nextKey];
                        }
                    }
                }
            }
            return to;
        },
        writable: true,
        configurable: true,
    });
}
// String.prototype.startsWith
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/startsWith
if (!String.prototype.startsWith) {
    Object.defineProperty(String.prototype, 'startsWith', {
        value: function (search, rawPos) {
            var pos = rawPos > 0 ? rawPos | 0 : 0;
            return this.substring(pos, pos + search.length) === search;
        },
    });
}