用JavaScript动态加载CSS和JS文件

var dynamicLoading = {
    css: function (path) {
        if (!path || path.length === 0) {
            throw new Error('argument "path" is required !');
        }
        var head = document.getElementsByTagName('head')[0];
        var link = document.createElement('link');
        link.href = path;
        link.rel = 'stylesheet';
        link.type = 'text/css';
        head.appendChild(link);
    },
    js: function (path) {
        if (!path || path.length === 0) {
            throw new Error('argument "path" is required !');
        }
        var head = document.getElementsByTagName('head')[0];
        var script = document.createElement('script');
        script.src = path;
        script.type = 'text/javascript';
        head.appendChild(script);
    }
}

//动态加载 CSS 文件
dynamicLoading.css("css/test.css?v=201705027588797");
//动态加载 JS 文件
dynamicLoading.js("test.js");