1/* 2 mediaCheck - http://github.com/sparkbox/mediaCheck 3 Version: 0.4.6, 10-21-2016 Author: Rob Tarr (http://twitter.com/robtarr) 4*/ 5(function () { window.mediaCheck = function (options) { var breakpoints, checkQuery, convertEmToPx, createListener, getPXValue, hasMatchMedia, i, mmListener, mq, mqChange; mq = void 0; mqChange = void 0; createListener = void 0; convertEmToPx = void 0; getPXValue = void 0; hasMatchMedia = window.matchMedia !== undefined && !!window.matchMedia("!").addListener; if (hasMatchMedia) { mqChange = function (mq, options) { if (mq.matches) { if (typeof options.entry === "function") { options.entry(mq) } } else { if (typeof options.exit === "function") { options.exit(mq) } } if (typeof options.both === "function") { return options.both(mq) } }; createListener = function () { mq = window.matchMedia(options.media); mq.addListener(function () { return mqChange(mq, options) }); window.addEventListener("orientationchange", function () { mq = window.matchMedia(options.media); return mqChange(mq, options) }, false); return mqChange(mq, options) }; return createListener() } else { breakpoints = {}; mqChange = function (mq, options) { if (mq.matches) { if (typeof options.entry === "function" && (breakpoints[options.media] === false || breakpoints[options.media] == null)) { options.entry(mq) } } else { if (typeof options.exit === "function" && (breakpoints[options.media] === true || breakpoints[options.media] == null)) { options.exit(mq) } } if (typeof options.both === "function") { options.both(mq) } return breakpoints[options.media] = mq.matches }; convertEmToPx = function (value) { var emElement, px; emElement = void 0; emElement = document.createElement("div"); emElement.style.width = "1em"; emElement.style.position = "absolute"; document.body.appendChild(emElement); px = value * emElement.offsetWidth; document.body.removeChild(emElement); return px }; getPXValue = function (width, unit) { var value; value = void 0; switch (unit) { case "em": value = convertEmToPx(width); break; default: value = width }return value }; for (i in options) { breakpoints[options.media] = null } checkQuery = function (parts) { var constraint, dimension, matches, ratio, value, windowHeight, windowWidth; constraint = parts[1]; dimension = parts[2]; if (parts[4]) { value = getPXValue(parseInt(parts[3], 10), parts[4]) } else { value = parts[3] } windowWidth = window.innerWidth || document.documentElement.clientWidth; windowHeight = window.innerHeight || document.documentElement.clientHeight; if (dimension === "width") { matches = constraint === "max" && value > windowWidth || constraint === "min" && value < windowWidth } else if (dimension === "height") { matches = constraint === "max" && value > windowHeight || constraint === "min" && value < windowHeight } else if (dimension === "aspect-ratio") { ratio = windowWidth / windowHeight; matches = constraint === "max" && eval(ratio) < eval(value) || constraint === "min" && eval(ratio) > eval(value) } return matches }; mmListener = function () { var j, len, matches, media, medias, parts; medias = options.media.split(/\sand\s|,\s/); matches = true; for (j = 0, len = medias.length; j < len; j++) { media = medias[j]; parts = media.match(/\((.*?)-(.*?):\s([\d\/]*)(\w*)\)/); if (!checkQuery(parts)) { matches = false } } return mqChange({ media: options.media, matches: matches }, options) }; if (window.addEventListener) { window.addEventListener("resize", mmListener, false) } else { if (window.attachEvent) { window.attachEvent("onresize", mmListener) } } return mmListener() } } }).call(this);
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