Function detect

_benchmarks/sample_echarts.js:119–156

(ua, env)

        detect(navigator.userAgent, env);
    }
    function detect(ua, env) {
        var browser = env.browser;
        var firefox = ua.match(/Firefox\/([\d.]+)/);
        var ie = ua.match(/MSIE\s([\d.]+)/)
            || ua.match(/Trident\/.+?rv:(([\d.]+))/);
        var edge = ua.match(/Edge?\/([\d.]+)/);
        var weChat = (/micromessenger/i).test(ua);
        if (firefox) {
            browser.firefox = true;
            browser.version = firefox[1];
        }
        if (ie) {
            browser.ie = true;
            browser.version = ie[1];
        }
        if (edge) {
            browser.edge = true;
            browser.version = edge[1];
            browser.newEdge = +edge[1].split('.')[0] > 18;
        }
        if (weChat) {
            browser.weChat = true;
        }
        env.canvasSupported = !!document.createElement('canvas').getContext;
        env.svgSupported = typeof SVGRect !== 'undefined';
        env.touchEventsSupported = 'ontouchstart' in window && !browser.ie && !browser.edge;
        env.pointerEventsSupported = 'onpointerdown' in window
            && (browser.edge || (browser.ie && +browser.version >= 11));
        env.domSupported = typeof document !== 'undefined';
        var style = document.documentElement.style;
        env.transform3dSupported = ((browser.ie && 'transition' in style)
            || browser.edge
            || (('WebKitCSSMatrix' in window) && ('m11' in new WebKitCSSMatrix()))
            || 'MozPerspective' in style)
            && !('OTransition' in style);
        env.transformSupported = env.transform3dSupported
            || (browser.ie && +browser.version >= 9);
    }

    var BUILTIN_OBJECT = {
        '[object Function]': true,