/*! * modernizr v3.5.0 * Build https://modernizr.com/download?-flexbox-flexwrap-setclasses-dontmin * * Copyright (c) * Faruk Ates * Paul Irish * Alex Sexton * Ryan Seddon * Patrick Kettner * Stu Cox * Richard Herrera * MIT License */ /* * Modernizr tests which native CSS3 and HTML5 features are available in the * current UA and makes the results available to you in two ways: as properties on * a global `Modernizr` object, and as classes on the `` element. This * information allows you to progressively enhance your pages with a granular level * of control over the experience. */ ;(function(window, document, undefined){ var classes = []; var tests = []; /** * * ModernizrProto is the constructor for Modernizr * * @class * @access public */ var ModernizrProto = { // The current version, dummy _version: '3.5.0', // Any settings that don't work as separate modules // can go in here as configuration. _config: { 'classPrefix': '', 'enableClasses': true, 'enableJSClass': true, 'usePrefixes': true }, // Queue of tests _q: [], // Stub these for people who are listening on: function(test, cb) { // I don't really think people should do this, but we can // safe guard it a bit. // -- NOTE:: this gets WAY overridden in src/addTest for actual async tests. // This is in case people listen to synchronous tests. I would leave it out, // but the code to *disallow* sync tests in the real version of this // function is actually larger than this. var self = this; setTimeout(function() { cb(self[test]); }, 0); }, addTest: function(name, fn, options) { tests.push({name: name, fn: fn, options: options}); }, addAsyncTest: function(fn) { tests.push({name: null, fn: fn}); } }; // Fake some of Object.create so we can force non test results to be non "own" properties. var Modernizr = function() {}; Modernizr.prototype = ModernizrProto; // Leak modernizr globally when you `require` it rather than force it here. // Overwrite name so constructor name is nicer :D Modernizr = new Modernizr(); /** * is returns a boolean if the typeof an obj is exactly type. * * @access private * @function is * @param {*} obj - A thing we want to check the type of * @param {string} type - A string to compare the typeof against * @returns {boolean} */ function is(obj, type) { return typeof obj === type; } ; /** * Run through all tests and detect their support in the current UA. * * @access private */ function testRunner() { var featureNames; var feature; var aliasIdx; var result; var nameIdx; var featureName; var featureNameSplit; for (var featureIdx in tests) { if (tests.hasOwnProperty(featureIdx)) { featureNames = []; feature = tests[featureIdx]; // run the test, throw the return value into the Modernizr, // then based on that boolean, define an appropriate className // and push it into an array of classes we'll join later. // // If there is no name, it's an 'async' test that is run, // but not directly added to the object. That should // be done with a post-run addTest call. if (feature.name) { featureNames.push(feature.name.toLowerCase()); if (feature.options && feature.options.aliases && feature.options.aliases.length) { // Add all the aliases into the names list for (aliasIdx = 0; aliasIdx < feature.options.aliases.length; aliasIdx++) { featureNames.push(feature.options.aliases[aliasIdx].toLowerCase()); } } } // Run the test, or use the raw value if it's not a function result = is(feature.fn, 'function') ? feature.fn() : feature.fn; // Set each of the names on the Modernizr object for (nameIdx = 0; nameIdx < featureNames.length; nameIdx++) { featureName = featureNames[nameIdx]; // Support dot properties as sub tests. We don't do checking to make sure // that the implied parent tests have been added. You must call them in // order (either in the test, or make the parent test a dependency). // // Cap it to TWO to make the logic simple and because who needs that kind of subtesting // hashtag famous last words featureNameSplit = featureName.split('.'); if (featureNameSplit.length === 1) { Modernizr[featureNameSplit[0]] = result; } else { // cast to a Boolean, if not one already if (Modernizr[featureNameSplit[0]] && !(Modernizr[featureNameSplit[0]] instanceof Boolean)) { Modernizr[featureNameSplit[0]] = new Boolean(Modernizr[featureNameSplit[0]]); } Modernizr[featureNameSplit[0]][featureNameSplit[1]] = result; } classes.push((result ? '' : 'no-') + featureNameSplit.join('-')); } } } } ; /** * docElement is a convenience wrapper to grab the root element of the document * * @access private * @returns {HTMLElement|SVGElement} The root element of the document */ var docElement = document.documentElement; /** * A convenience helper to check if the document we are running in is an SVG document * * @access private * @returns {boolean} */ var isSVG = docElement.nodeName.toLowerCase() === 'svg'; /** * setClasses takes an array of class names and adds them to the root element * * @access private * @function setClasses * @param {string[]} classes - Array of class names */ // Pass in an and array of class names, e.g.: // ['no-webp', 'borderradius', ...] function setClasses(classes) { var className = docElement.className; var classPrefix = Modernizr._config.classPrefix || ''; if (isSVG) { className = className.baseVal; } // Change `no-js` to `js` (independently of the `enableClasses` option) // Handle classPrefix on this too if (Modernizr._config.enableJSClass) { var reJS = new RegExp('(^|\\s)' + classPrefix + 'no-js(\\s|$)'); className = className.replace(reJS, '$1' + classPrefix + 'js$2'); } if (Modernizr._config.enableClasses) { // Add the new classes className += ' ' + classPrefix + classes.join(' ' + classPrefix); if (isSVG) { docElement.className.baseVal = className; } else { docElement.className = className; } } } ; /** * If the browsers follow the spec, then they would expose vendor-specific styles as: * elem.style.WebkitBorderRadius * instead of something like the following (which is technically incorrect): * elem.style.webkitBorderRadius * WebKit ghosts their properties in lowercase but Opera & Moz do not. * Microsoft uses a lowercase `ms` instead of the correct `Ms` in IE8+ * erik.eae.net/archives/2008/03/10/21.48.10/ * More here: github.com/Modernizr/Modernizr/issues/issue/21 * * @access private * @returns {string} The string representing the vendor-specific style properties */ var omPrefixes = 'Moz O ms Webkit'; var cssomPrefixes = (ModernizrProto._config.usePrefixes ? omPrefixes.split(' ') : []); ModernizrProto._cssomPrefixes = cssomPrefixes; /** * List of JavaScript DOM values used for tests * * @memberof Modernizr * @name Modernizr._domPrefixes * @optionName Modernizr._domPrefixes * @optionProp domPrefixes * @access public * @example * * Modernizr._domPrefixes is exactly the same as [_prefixes](#modernizr-_prefixes), but rather * than kebab-case properties, all properties are their Capitalized variant * * ```js * Modernizr._domPrefixes === [ "Moz", "O", "ms", "Webkit" ]; * ``` */ var domPrefixes = (ModernizrProto._config.usePrefixes ? omPrefixes.toLowerCase().split(' ') : []); ModernizrProto._domPrefixes = domPrefixes; /** * contains checks to see if a string contains another string * * @access private * @function contains * @param {string} str - The string we want to check for substrings * @param {string} substr - The substring we want to search the first string for * @returns {boolean} */ function contains(str, substr) { return !!~('' + str).indexOf(substr); } ; /** * createElement is a convenience wrapper around document.createElement. Since we * use createElement all over the place, this allows for (slightly) smaller code * as well as abstracting away issues with creating elements in contexts other than * HTML documents (e.g. SVG documents). * * @access private * @function createElement * @returns {HTMLElement|SVGElement} An HTML or SVG element */ function createElement() { if (typeof document.createElement !== 'function') { // This is the case in IE7, where the type of createElement is "object". // For this reason, we cannot call apply() as Object is not a Function. return document.createElement(arguments[0]); } else if (isSVG) { return document.createElementNS.call(document, 'http://www.w3.org/2000/svg', arguments[0]); } else { return document.createElement.apply(document, arguments); } } ; /** * cssToDOM takes a kebab-case string and converts it to camelCase * e.g. box-sizing -> boxSizing * * @access private * @function cssToDOM * @param {string} name - String name of kebab-case prop we want to convert * @returns {string} The camelCase version of the supplied name */ function cssToDOM(name) { return name.replace(/([a-z])-([a-z])/g, function(str, m1, m2) { return m1 + m2.toUpperCase(); }).replace(/^-/, ''); } ; /** * fnBind is a super small [bind](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/bind) polyfill. * * @access private * @function fnBind * @param {function} fn - a function you want to change `this` reference to * @param {object} that - the `this` you want to call the function with * @returns {function} The wrapped version of the supplied function */ function fnBind(fn, that) { return function() { return fn.apply(that, arguments); }; } ; /** * testDOMProps is a generic DOM property test; if a browser supports * a certain property, it won't return undefined for it. * * @access private * @function testDOMProps * @param {array.} props - An array of properties to test for * @param {object} obj - An object or Element you want to use to test the parameters again * @param {boolean|object} elem - An Element to bind the property lookup again. Use `false` to prevent the check * @returns {false|*} returns false if the prop is unsupported, otherwise the value that is supported */ function testDOMProps(props, obj, elem) { var item; for (var i in props) { if (props[i] in obj) { // return the property name as a string if (elem === false) { return props[i]; } item = obj[props[i]]; // let's bind a function if (is(item, 'function')) { // bind to obj unless overriden return fnBind(item, elem || obj); } // return the unbound function or obj or value return item; } } return false; } ; /** * Create our "modernizr" element that we do most feature tests on. * * @access private */ var modElem = { elem: createElement('modernizr') }; // Clean up this element Modernizr._q.push(function() { delete modElem.elem; }); var mStyle = { style: modElem.elem.style }; // kill ref for gc, must happen before mod.elem is removed, so we unshift on to // the front of the queue. Modernizr._q.unshift(function() { delete mStyle.style; }); /** * domToCSS takes a camelCase string and converts it to kebab-case * e.g. boxSizing -> box-sizing * * @access private * @function domToCSS * @param {string} name - String name of camelCase prop we want to convert * @returns {string} The kebab-case version of the supplied name */ function domToCSS(name) { return name.replace(/([A-Z])/g, function(str, m1) { return '-' + m1.toLowerCase(); }).replace(/^ms-/, '-ms-'); } ; /** * wrapper around getComputedStyle, to fix issues with Firefox returning null when * called inside of a hidden iframe * * @access private * @function computedStyle * @param {HTMLElement|SVGElement} - The element we want to find the computed styles of * @param {string|null} [pseudoSelector]- An optional pseudo element selector (e.g. :before), of null if none * @returns {CSSStyleDeclaration} */ function computedStyle(elem, pseudo, prop) { var result; if ('getComputedStyle' in window) { result = getComputedStyle.call(window, elem, pseudo); var console = window.console; if (result !== null) { if (prop) { result = result.getPropertyValue(prop); } } else { if (console) { var method = console.error ? 'error' : 'log'; console[method].call(console, 'getComputedStyle returning null, its possible modernizr test results are inaccurate'); } } } else { result = !pseudo && elem.currentStyle && elem.currentStyle[prop]; } return result; } ; /** * getBody returns the body of a document, or an element that can stand in for * the body if a real body does not exist * * @access private * @function getBody * @returns {HTMLElement|SVGElement} Returns the real body of a document, or an * artificially created element that stands in for the body */ function getBody() { // After page load injecting a fake body doesn't work so check if body exists var body = document.body; if (!body) { // Can't use the real body create a fake one. body = createElement(isSVG ? 'svg' : 'body'); body.fake = true; } return body; } ; /** * injectElementWithStyles injects an element with style element and some CSS rules * * @access private * @function injectElementWithStyles * @param {string} rule - String representing a css rule * @param {function} callback - A function that is used to test the injected element * @param {number} [nodes] - An integer representing the number of additional nodes you want injected * @param {string[]} [testnames] - An array of strings that are used as ids for the additional nodes * @returns {boolean} */ function injectElementWithStyles(rule, callback, nodes, testnames) { var mod = 'modernizr'; var style; var ret; var node; var docOverflow; var div = createElement('div'); var body = getBody(); if (parseInt(nodes, 10)) { // In order not to give false positives we create a node for each test // This also allows the method to scale for unspecified uses while (nodes--) { node = createElement('div'); node.id = testnames ? testnames[nodes] : mod + (nodes + 1); div.appendChild(node); } } style = createElement('style'); style.type = 'text/css'; style.id = 's' + mod; // IE6 will false positive on some tests due to the style element inside the test div somehow interfering offsetHeight, so insert it into body or fakebody. // Opera will act all quirky when injecting elements in documentElement when page is served as xml, needs fakebody too. #270 (!body.fake ? div : body).appendChild(style); body.appendChild(div); if (style.styleSheet) { style.styleSheet.cssText = rule; } else { style.appendChild(document.createTextNode(rule)); } div.id = mod; if (body.fake) { //avoid crashing IE8, if background image is used body.style.background = ''; //Safari 5.13/5.1.4 OSX stops loading if ::-webkit-scrollbar is used and scrollbars are visible body.style.overflow = 'hidden'; docOverflow = docElement.style.overflow; docElement.style.overflow = 'hidden'; docElement.appendChild(body); } ret = callback(div, rule); // If this is done after page load we don't want to remove the body so check if body exists if (body.fake) { body.parentNode.removeChild(body); docElement.style.overflow = docOverflow; // Trigger layout so kinetic scrolling isn't disabled in iOS6+ // eslint-disable-next-line docElement.offsetHeight; } else { div.parentNode.removeChild(div); } return !!ret; } ; /** * nativeTestProps allows for us to use native feature detection functionality if available. * some prefixed form, or false, in the case of an unsupported rule * * @access private * @function nativeTestProps * @param {array} props - An array of property names * @param {string} value - A string representing the value we want to check via @supports * @returns {boolean|undefined} A boolean when @supports exists, undefined otherwise */ // Accepts a list of property names and a single value // Returns `undefined` if native detection not available function nativeTestProps(props, value) { var i = props.length; // Start with the JS API: http://www.w3.org/TR/css3-conditional/#the-css-interface if ('CSS' in window && 'supports' in window.CSS) { // Try every prefixed variant of the property while (i--) { if (window.CSS.supports(domToCSS(props[i]), value)) { return true; } } return false; } // Otherwise fall back to at-rule (for Opera 12.x) else if ('CSSSupportsRule' in window) { // Build a condition string for every prefixed variant var conditionText = []; while (i--) { conditionText.push('(' + domToCSS(props[i]) + ':' + value + ')'); } conditionText = conditionText.join(' or '); return injectElementWithStyles('@supports (' + conditionText + ') { #modernizr { position: absolute; } }', function(node) { return computedStyle(node, null, 'position') == 'absolute'; }); } return undefined; } ; // testProps is a generic CSS / DOM property test. // In testing support for a given CSS property, it's legit to test: // `elem.style[styleName] !== undefined` // If the property is supported it will return an empty string, // if unsupported it will return undefined. // We'll take advantage of this quick test and skip setting a style // on our modernizr element, but instead just testing undefined vs // empty string. // Property names can be provided in either camelCase or kebab-case. function testProps(props, prefixed, value, skipValueTest) { skipValueTest = is(skipValueTest, 'undefined') ? false : skipValueTest; // Try native detect first if (!is(value, 'undefined')) { var result = nativeTestProps(props, value); if (!is(result, 'undefined')) { return result; } } // Otherwise do it properly var afterInit, i, propsLength, prop, before; // If we don't have a style element, that means we're running async or after // the core tests, so we'll need to create our own elements to use // inside of an SVG element, in certain browsers, the `style` element is only // defined for valid tags. Therefore, if `modernizr` does not have one, we // fall back to a less used element and hope for the best. // for strict XHTML browsers the hardly used samp element is used var elems = ['modernizr', 'tspan', 'samp']; while (!mStyle.style && elems.length) { afterInit = true; mStyle.modElem = createElement(elems.shift()); mStyle.style = mStyle.modElem.style; } // Delete the objects if we created them. function cleanElems() { if (afterInit) { delete mStyle.style; delete mStyle.modElem; } } propsLength = props.length; for (i = 0; i < propsLength; i++) { prop = props[i]; before = mStyle.style[prop]; if (contains(prop, '-')) { prop = cssToDOM(prop); } if (mStyle.style[prop] !== undefined) { // If value to test has been passed in, do a set-and-check test. // 0 (integer) is a valid property value, so check that `value` isn't // undefined, rather than just checking it's truthy. if (!skipValueTest && !is(value, 'undefined')) { // Needs a try catch block because of old IE. This is slow, but will // be avoided in most cases because `skipValueTest` will be used. try { mStyle.style[prop] = value; } catch (e) {} // If the property value has changed, we assume the value used is // supported. If `value` is empty string, it'll fail here (because // it hasn't changed), which matches how browsers have implemented // CSS.supports() if (mStyle.style[prop] != before) { cleanElems(); return prefixed == 'pfx' ? prop : true; } } // Otherwise just return true, or the property name if this is a // `prefixed()` call else { cleanElems(); return prefixed == 'pfx' ? prop : true; } } } cleanElems(); return false; } ; /** * testPropsAll tests a list of DOM properties we want to check against. * We specify literally ALL possible (known and/or likely) properties on * the element including the non-vendor prefixed one, for forward- * compatibility. * * @access private * @function testPropsAll * @param {string} prop - A string of the property to test for * @param {string|object} [prefixed] - An object to check the prefixed properties on. Use a string to skip * @param {HTMLElement|SVGElement} [elem] - An element used to test the property and value against * @param {string} [value] - A string of a css value * @param {boolean} [skipValueTest] - An boolean representing if you want to test if value sticks when set * @returns {false|string} returns the string version of the property, or false if it is unsupported */ function testPropsAll(prop, prefixed, elem, value, skipValueTest) { var ucProp = prop.charAt(0).toUpperCase() + prop.slice(1), props = (prop + ' ' + cssomPrefixes.join(ucProp + ' ') + ucProp).split(' '); // did they call .prefixed('boxSizing') or are we just testing a prop? if (is(prefixed, 'string') || is(prefixed, 'undefined')) { return testProps(props, prefixed, value, skipValueTest); // otherwise, they called .prefixed('requestAnimationFrame', window[, elem]) } else { props = (prop + ' ' + (domPrefixes).join(ucProp + ' ') + ucProp).split(' '); return testDOMProps(props, prefixed, elem); } } // Modernizr.testAllProps() investigates whether a given style property, // or any of its vendor-prefixed variants, is recognized // // Note that the property names must be provided in the camelCase variant. // Modernizr.testAllProps('boxSizing') ModernizrProto.testAllProps = testPropsAll; /** * testAllProps determines whether a given CSS property is supported in the browser * * @memberof Modernizr * @name Modernizr.testAllProps * @optionName Modernizr.testAllProps() * @optionProp testAllProps * @access public * @function testAllProps * @param {string} prop - String naming the property to test (either camelCase or kebab-case) * @param {string} [value] - String of the value to test * @param {boolean} [skipValueTest=false] - Whether to skip testing that the value is supported when using non-native detection * @example * * testAllProps determines whether a given CSS property, in some prefixed form, * is supported by the browser. * * ```js * testAllProps('boxSizing') // true * ``` * * It can optionally be given a CSS value in string form to test if a property * value is valid * * ```js * testAllProps('display', 'block') // true * testAllProps('display', 'penguin') // false * ``` * * A boolean can be passed as a third parameter to skip the value check when * native detection (@supports) isn't available. * * ```js * testAllProps('shapeOutside', 'content-box', true); * ``` */ function testAllProps(prop, value, skipValueTest) { return testPropsAll(prop, undefined, undefined, value, skipValueTest); } ModernizrProto.testAllProps = testAllProps; /*! { "name": "Flexbox", "property": "flexbox", "caniuse": "flexbox", "tags": ["css"], "notes": [{ "name": "The _new_ flexbox", "href": "http://dev.w3.org/csswg/css3-flexbox" }], "warnings": [ "A `true` result for this detect does not imply that the `flex-wrap` property is supported; see the `flexwrap` detect." ] } !*/ /* DOC Detects support for the Flexible Box Layout model, a.k.a. Flexbox, which allows easy manipulation of layout order and sizing within a container. */ Modernizr.addTest('flexbox', testAllProps('flexBasis', '1px', true)); /*! { "name": "Flex Line Wrapping", "property": "flexwrap", "tags": ["css", "flexbox"], "notes": [{ "name": "W3C Flexible Box Layout spec", "href": "http://dev.w3.org/csswg/css3-flexbox" }], "warnings": [ "Does not imply a modern implementation – see documentation." ] } !*/ /* DOC Detects support for the `flex-wrap` CSS property, part of Flexbox, which isn’t present in all Flexbox implementations (notably Firefox). This featured in both the 'tweener' syntax (implemented by IE10) and the 'modern' syntax (implemented by others). This detect will return `true` for either of these implementations, as long as the `flex-wrap` property is supported. So to ensure the modern syntax is supported, use together with `Modernizr.flexbox`: ```javascript if (Modernizr.flexbox && Modernizr.flexwrap) { // Modern Flexbox with `flex-wrap` supported } else { // Either old Flexbox syntax, or `flex-wrap` not supported } ``` */ Modernizr.addTest('flexwrap', testAllProps('flexWrap', 'wrap', true)); // Run each test testRunner(); // Remove the "no-js" class if it exists setClasses(classes); delete ModernizrProto.addTest; delete ModernizrProto.addAsyncTest; // Run the things that are supposed to run after the tests for (var i = 0; i < Modernizr._q.length; i++) { Modernizr._q[i](); } // Leak Modernizr namespace window.Modernizr = Modernizr; ; })(window, document);