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polyfill.js
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polyfill.js
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'use strict';
// help-function
function addEvent( obj, evt, fnc ) {
// W3C model
if ( obj.addEventListener ) {
obj.addEventListener( evt, fnc, false );
return true;
}
// Microsoft model
else if ( obj.attachEvent ) {
return obj.attachEvent( 'on' + evt, fnc );
}
// Browser don't support W3C or MSFT model, go on with traditional
else {
evt = 'on' + evt;
if ( typeof obj[ evt ] === 'function' ) {
// Object already has a function on traditional Let's wrap it with our own function inside another function
fnc = (function ( f1, f2 ) {
return function () {
f1.apply( this, arguments );
f2.apply( this, arguments );
};
})( obj[ evt ], fnc );
}
obj[ evt ] = fnc;
return true;
}
return false;
}
function removeEvent(elem,eventType,handler) {
if (elem.removeEventListener)
elem.removeEventListener (eventType,handler,false);
if (elem.detachEvent)
elem.detachEvent ('on'+eventType,handler);
}
function isNumeric( n ) {
return ! isNaN( parseFloat( n ) ) && isFinite( n );
}
function getRandomInt( min, max ) {
return Math.floor( Math.random() * ( max - min ) ) + min;
}
function getRandomArbitrary( min, max ) {
return Math.random() * ( max - min ) + min;
}
// requestAnimationFrame polyfil
( function () {
var lastTime = 0;
var vendors = [ 'ms', 'moz', 'webkit', 'o' ];
for ( var x = 0; x < vendors.length
&& ! window.requestAnimationFrame; ++ x ) {
window.requestAnimationFrame = window[ vendors[ x ] + 'RequestAnimationFrame' ];
window.cancelAnimationFrame = window[ vendors[ x ] + 'CancelAnimationFrame' ]
|| window[ vendors[ x ] + 'CancelRequestAnimationFrame' ];
}
if ( ! window.requestAnimationFrame ) {
window.requestAnimationFrame = function ( callback, element ) {
var currTime = new Date().getTime();
var timeToCall = Math.max( 0, 16 - ( currTime - lastTime ) );
var id = window.setTimeout(
function () {
callback( currTime + timeToCall );
},
timeToCall
);
lastTime = currTime + timeToCall;
return id;
};
}
if ( ! window.cancelAnimationFrame ) {
window.cancelAnimationFrame = function ( id ) {
clearTimeout( id );
};
}
}() );
// prefomance.now() polyfill
(function(){
if ("performance" in window == false) {
window.performance = {};
}
Date.now = (Date.now || function () { // thanks IE8
return new Date().getTime();
});
if ("now" in window.performance == false){
var nowOffset = Date.now();
if (performance.timing && performance.timing.navigationStart){
nowOffset = performance.timing.navigationStart
}
window.performance.now = function now(){
return Date.now() - nowOffset;
}
}
})();
if ( ! document.getElementsByClassName ) {
document.getElementsByClassName = function ( search ) {
var d = document, elements, pattern, i, results = [];
if ( d.querySelectorAll ) { // IE8
return d.querySelectorAll( "." + search );
}
if ( d.evaluate ) { // IE6, IE7
pattern = ".///[contains(concat(' ', @class, ' '), ' " + search + " ')]";
elements = d.evaluate( pattern, d, null, 0, null );
while ( ( i = elements.iterateNext() ) ) {
results.push( i );
}
}
else {
elements = d.getElementsByTagName( "*" );
pattern = new RegExp( "(^|\\s)" + search + "(\\s|$)" );
for ( i = 0; i < elements.length; i ++ ) {
if ( pattern.test( elements[ i ].className ) ) {
results.push( elements[ i ] );
}
}
}
return results;
};
}
//CanvasRenderingContext2D.renderText extension
if ( CanvasRenderingContext2D && ! CanvasRenderingContext2D.renderText ) {
// @param letterSpacing {float} CSS letter-spacing property
CanvasRenderingContext2D.prototype.renderText = function ( text, x, y, letterSpacing ) {
if ( ! text || typeof text !== 'string' || text.length === 0 ) {
return;
}
if ( typeof letterSpacing === 'undefined' ) {
letterSpacing = 0;
}
// letterSpacing of 0 means normal letter-spacing
var characters = String.prototype.split.call( text, '' ), index = 0, current, currentPosition = x, align = 1;
if ( this.textAlign === 'right' ) {
characters = characters.reverse();
align = - 1;
}
else if ( this.textAlign === 'center' ) {
var totalWidth = 0;
for ( var i = 0; i < characters.length; i ++ ) {
totalWidth += ( this.measureText( characters[ i ] ).width + letterSpacing );
}
currentPosition = x - ( totalWidth / 2 );
}
while ( index < text.length ) {
current = characters[ index ++ ];
this.fillText( current, currentPosition, y );
currentPosition += ( align * ( this.measureText( current ).width + letterSpacing ) );
}
};
}
// classList polyfill
/*
* classList.js: Cross-browser full element.classList implementation.
* 1.1.20150312
*
* By Eli Grey, http://eligrey.com
* License: Dedicated to the public domain.
* See https://github.com/eligrey/classList.js/blob/master/LICENSE.md
*/
/*global self, document, DOMException */
/*! @source http://purl.eligrey.com/github/classList.js/blob/master/classList.js */
if ("document" in self) {
// Full polyfill for browsers with no classList support
// Including IE < Edge missing SVGElement.classList
if (!("classList" in document.createElement("_"))
|| document.createElementNS && !("classList" in document.createElementNS("http://www.w3.org/2000/svg","g"))) {
(function (view) {
"use strict";
if (!('Element' in view)) return;
var
classListProp = "classList"
, protoProp = "prototype"
, elemCtrProto = view.Element[protoProp]
, objCtr = Object
, strTrim = String[protoProp].trim || function () {
return this.replace(/^\s+|\s+$/g, "");
}
, arrIndexOf = Array[protoProp].indexOf || function (item) {
var
i = 0
, len = this.length
;
for (; i < len; i++) {
if (i in this && this[i] === item) {
return i;
}
}
return -1;
}
// Vendors: please allow content code to instantiate DOMExceptions
, DOMEx = function (type, message) {
this.name = type;
this.code = DOMException[type];
this.message = message;
}
, checkTokenAndGetIndex = function (classList, token) {
if (token === "") {
throw new DOMEx(
"SYNTAX_ERR"
, "An invalid or illegal string was specified"
);
}
if (/\s/.test(token)) {
throw new DOMEx(
"INVALID_CHARACTER_ERR"
, "String contains an invalid character"
);
}
return arrIndexOf.call(classList, token);
}
, ClassList = function (elem) {
var
trimmedClasses = strTrim.call(elem.getAttribute("class") || "")
, classes = trimmedClasses ? trimmedClasses.split(/\s+/) : []
, i = 0
, len = classes.length
;
for (; i < len; i++) {
this.push(classes[i]);
}
this._updateClassName = function () {
elem.setAttribute("class", this.toString());
};
}
, classListProto = ClassList[protoProp] = []
, classListGetter = function () {
return new ClassList(this);
}
;
// Most DOMException implementations don't allow calling DOMException's toString()
// on non-DOMExceptions. Error's toString() is sufficient here.
DOMEx[protoProp] = Error[protoProp];
classListProto.item = function (i) {
return this[i] || null;
};
classListProto.contains = function (token) {
token += "";
return checkTokenAndGetIndex(this, token) !== -1;
};
classListProto.add = function () {
var
tokens = arguments
, i = 0
, l = tokens.length
, token
, updated = false
;
do {
token = tokens[i] + "";
if (checkTokenAndGetIndex(this, token) === -1) {
this.push(token);
updated = true;
}
}
while (++i < l);
if (updated) {
this._updateClassName();
}
};
classListProto.remove = function () {
var
tokens = arguments
, i = 0
, l = tokens.length
, token
, updated = false
, index
;
do {
token = tokens[i] + "";
index = checkTokenAndGetIndex(this, token);
while (index !== -1) {
this.splice(index, 1);
updated = true;
index = checkTokenAndGetIndex(this, token);
}
}
while (++i < l);
if (updated) {
this._updateClassName();
}
};
classListProto.toggle = function (token, force) {
token += "";
var
result = this.contains(token)
, method = result ?
force !== true && "remove"
:
force !== false && "add"
;
if (method) {
this[method](token);
}
if (force === true || force === false) {
return force;
} else {
return !result;
}
};
classListProto.toString = function () {
return this.join(" ");
};
if (objCtr.defineProperty) {
var classListPropDesc = {
get: classListGetter
, enumerable: true
, configurable: true
};
try {
objCtr.defineProperty(elemCtrProto, classListProp, classListPropDesc);
} catch (ex) { // IE 8 doesn't support enumerable:true
if (ex.number === -0x7FF5EC54) {
classListPropDesc.enumerable = false;
objCtr.defineProperty(elemCtrProto, classListProp, classListPropDesc);
}
}
} else if (objCtr[protoProp].__defineGetter__) {
elemCtrProto.__defineGetter__(classListProp, classListGetter);
}
}(self));
} else {
// There is full or partial native classList support, so just check if we need
// to normalize the add/remove and toggle APIs.
(function () {
"use strict";
var testElement = document.createElement("_");
testElement.classList.add("c1", "c2");
// Polyfill for IE 10/11 and Firefox <26, where classList.add and
// classList.remove exist but support only one argument at a time.
if (!testElement.classList.contains("c2")) {
var createMethod = function(method) {
var original = DOMTokenList.prototype[method];
DOMTokenList.prototype[method] = function(token) {
var i, len = arguments.length;
for (i = 0; i < len; i++) {
token = arguments[i];
original.call(this, token);
}
};
};
createMethod('add');
createMethod('remove');
}
testElement.classList.toggle("c3", false);
// Polyfill for IE 10 and Firefox <24, where classList.toggle does not
// support the second argument.
if (testElement.classList.contains("c3")) {
var _toggle = DOMTokenList.prototype.toggle;
DOMTokenList.prototype.toggle = function(token, force) {
if (1 in arguments && !this.contains(token) === !force) {
return force;
} else {
return _toggle.call(this, token);
}
};
}
testElement = null;
}());
}
}