@atlassian/aui/lib/js/aui/internal/browser.js

Atlassian User Interface Framework

(function (global, factory) {
    if (typeof define === "function" && define.amd) {
        define(['exports'], factory);
    } else if (typeof exports !== "undefined") {
        factory(exports);
    } else {
        var mod = {
            exports: {}
        };
        factory(mod.exports);
        global.browser = mod.exports;
    }
})(this, function (exports) {
    'use strict';

    Object.defineProperty(exports, "__esModule", {
        value: true
    });
    exports.needsLayeringShim = needsLayeringShim;
    exports.supportsCalc = supportsCalc;
    exports.supportsRequestAnimationFrame = supportsRequestAnimationFrame;
    exports.supportsCssTransition = supportsCssTransition;
    exports.supportsVoiceOver = supportsVoiceOver;
    exports.supportsDateField = supportsDateField;
    exports.supportsNewMouseEvent = supportsNewMouseEvent;
    var ua = navigator.userAgent.toLowerCase();
    var isIE = /msie/.test(ua);
    var isWinXP = /windows nt 5.1/.test(ua);
    var isWinVista = /windows nt 6.0/.test(ua);
    var isWin7 = /windows nt 6.1/.test(ua);
    var isMacOSX = /mac os x/.test(ua);
    var doesSupportCalc;
    var doesSupportCssTransition;
    var doesSupportHtml5DateInput;

    /**
     * Layered elements can get obscured by <object>, <embed>, <select> or sometimes even <iframe>
     * on older versions of Windows + Internet Explorer.
     * From manual testing, all IE versions on Windows 7 appear to have the bug,
     * but no IE versions on Windows 8 have it.
     */
    function needsLayeringShim() {
        return isIE && (isWinXP || isWinVista || isWin7);
    }

    function supportsCalc() {
        if (typeof doesSupportCalc === 'undefined') {
            var d = document.createElement('div');
            d.style.cssText = 'height: -webkit-calc(20px + 0); height: calc(20px);';
            // browsers will cull the rules they don't understand, so we can check whether
            // any were added at all to confirm presence of the calc() behaviour.
            doesSupportCalc = d.style.cssText.length > 0;
        }
        return doesSupportCalc;
    }

    function supportsRequestAnimationFrame() {
        return !!window.requestAnimationFrame;
    }

    function supportsCssTransition() {
        if (typeof doesSupportCssTransition === 'undefined') {
            var documentBody = document.body || document.documentElement;
            var style = documentBody.style;
            doesSupportCssTransition = typeof style.transition === 'string' || typeof style.WebkitTransition === 'string';
        }
        return doesSupportCssTransition;
    }

    function supportsVoiceOver() {
        return isMacOSX;
    }

    function supportsDateField() {
        if (typeof doesSupportHtml5DateInput === 'undefined') {
            var el = document.createElement('input');
            el.setAttribute('type', 'date');
            doesSupportHtml5DateInput = el.type === 'date';
        }
        return doesSupportHtml5DateInput;
    }

    // This is supported everywhere except Chrome 22, but we needed to support this use case due to
    // https://bitbucket.org/atlassian/aui/pull-requests/1920/aui-4380-fix-shortcut-not-work-in-old/diff .
    function supportsNewMouseEvent() {
        try {
            new MouseEvent('click');
        } catch (e) {
            return false;
        }

        return true;
    }
});
//# sourceMappingURL=browser.js.map