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function defineProp(obj, name, val) {
Object.defineProperty(obj, name, {
value: val,
enumerable: false,
writable: true,
configurable: true
});
}
if (!String.prototype.startsWith) {
defineProp(
String.prototype,
"startsWith",
function (searchString, position) {
position = position || 0;
return this.lastIndexOf(searchString, position) === position;
}
);
}
if (!String.prototype.endsWith) {
// Taken from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/endsWith
defineProp(String.prototype, "endsWith", function (searchString, position) {
var subjectString = this;
if (position === undefined || position > subjectString.length) {
position = subjectString.length;
}
position -= searchString.length;
var lastIndex = subjectString.indexOf(searchString, position);
return lastIndex !== -1 && lastIndex === position;
});
}
if (!String.prototype.repeat) {
defineProp(String.prototype, "repeat", function (count) {
var result = "";
var string = this;
while (count > 0) {
if (count & 1) result += string;
if ((count >>= 1)) string += string;
}
return result;
});
}
if (!String.prototype.includes) {
defineProp(String.prototype, "includes", function (str, position) {
return this.indexOf(str, position) != -1;
});
}
if (!Object.assign) {
Object.assign = function (target) {
if (target === undefined || target === null) {
throw new TypeError("Cannot convert undefined or null to object");
}
var output = Object(target);
for (var index = 1; index < arguments.length; index++) {
var source = arguments[index];
if (source !== undefined && source !== null) {
Object.keys(source).forEach(function (key) {
output[key] = source[key];
});
}
}
return output;
};
}
if (!Object.values) {
Object.values = function (o) {
return Object.keys(o).map(function (k) {
return o[k];
});
};
}
if (!Array.prototype.find) {
defineProp(Array.prototype, "find", function (predicate) {
var len = this.length;
var thisArg = arguments[1];
for (var k = 0; k < len; k++) {
var kValue = this[k];
if (predicate.call(thisArg, kValue, k, this)) {
return kValue;
}
}
});
}
if (!Array.prototype.findIndex) {
defineProp(Array.prototype, "findIndex", function (predicate) {
var len = this.length;
var thisArg = arguments[1];
for (var k = 0; k < len; k++) {
var kValue = this[k];
if (predicate.call(thisArg, kValue, k, this)) {
return k;
}
}
});
}
if (!Array.prototype.includes) {
defineProp(Array.prototype, "includes", function (item, position) {
return this.indexOf(item, position) != -1;
});
}
if (!Array.prototype.fill) {
defineProp(Array.prototype, "fill", function (value) {
var O = this;
var len = O.length >>> 0;
var start = arguments[1];
var relativeStart = start >> 0;
var k =
relativeStart < 0
? Math.max(len + relativeStart, 0)
: Math.min(relativeStart, len);
var end = arguments[2];
var relativeEnd = end === undefined ? len : end >> 0;
var final =
relativeEnd < 0
? Math.max(len + relativeEnd, 0)
: Math.min(relativeEnd, len);
while (k < final) {
O[k] = value;
k++;
}
return O;
});
}
if (!Array.of) {
defineProp(Array, "of", function () {
return Array.prototype.slice.call(arguments);
});
}