// JS动态加载引入JS文件
// 1.调整标签位置
// 可以把 <script> 标签放到HTML文档的最后面，这样不影响页面加载。

// 2.动态创建script来加载
function loadJS(url, callback) {
  var script = document.createElement('script'),
    fn = callback || function () { };
  script.type = 'text/javascript';
  // IE
  if (script.readyState) {
    script.onreadystatechange = function () {
      if (script.readyState == 'loaded'
        || script.readyState == 'complete') {
        script.onreadystatechange = null;
        fn();
      }
    };
  } else {
    // 其他浏览器
    script.onload = function () {
      fn();
    };
  }
  script.src = url;
  document.getElementsByTagName('head')[0].appendChild(script);
}

// 获取链接参数
function getParamsSearch() {
  var url = window.location.search; //获取url中"?"符后的字串 
  var params = new Object();
  if (url.indexOf("?") != -1) {
    var str = url.substring(1);
    var strs = str.split("&");
    for (var i = 0; i < strs.length; i++) {
      params[strs[i].split("=")[0]] = strs[i].split("=")[1];
    }
  }
  return params;
}
var params = getParamsSearch()
console.log('params->', params)

    if (params.debug == 1) {
      loadJS('https://cloudm.oss-cn-hangzhou.aliyuncs.com/cdn/npm/vConsole/3.15.0/vconsole.min.js', function () {
        //加载,并执行回调函数
        console.log('动态引入js成功')
        // 开启 vconsole
        new VConsole();
      });
    }