namchey/linkpreview

/**
 * Polyfill for Array.fill
 */
if (!Array.prototype.fill) {
    Object.defineProperty(Array.prototype, 'fill', {
        value: function(value) {

            // Steps 1-2.
            if (this == null) {
                throw new TypeError('this is null or not defined');
            }

            var O = Object(this);

            // Steps 3-5.
            var len = O.length >>> 0;

            // Steps 6-7.
            var start = arguments[1];
            var relativeStart = start >> 0;

            // Step 8.
            var k = relativeStart < 0 ?
                Math.max(len + relativeStart, 0) :
                Math.min(relativeStart, len);

            // Steps 9-10.
            var end = arguments[2];
            var relativeEnd = end === undefined ?
                len : end >> 0;

            // Step 11.
            var final = relativeEnd < 0 ?
                Math.max(len + relativeEnd, 0) :
                Math.min(relativeEnd, len);

            // Step 12.
            while (k < final) {
                O[k] = value;
                k++;
            }

            // Step 13.
            return O;
        }
    });
}

/**
 * Polyfill for 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) { // TypeError if undefined or null
                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) { // Skip over if undefined or null
                    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
    });
}

/**
 * https://stackoverflow.com/questions/30867172/code-not-running-in-ie-11-works-fine-in-chrome#30867255
 */
if (!String.prototype.startsWith) {
    String.prototype.startsWith = function(searchString, position) {
        position = position || 0;
        return this.indexOf(searchString, position) === position;
    };
}