The location object

BOM object is a location object provides information about the current document window to load, and some of the navigation features include URL can be parsed into separate fragments. location is both a window object attributes, but also document object properties. window.location and document.location refer to the same object.

URL fragment

By location.hash can hash to the url

Query string parameters

  function getQueryStringArgs()
  {
      //1.取得查询字符串并去掉开头问号
      var qs=(location.search.length>0?location.search.substring(1):"");
      //保存数据的对象
      var args={};
      //3.取得每一项参数
      var items=qs.length?qs.split("&"):[];
      var item=null;
      var value=null;
      i=0;
      len=items.length;
      //逐个将每一项添加到args对象中
      for(i=0;i<len;i++){
          item=items[i].split("=");
          name=decodeURIComponent(item[0]);
          value=decodeURIComponent(item[1]);
          if(name.length){
              args[name]=valuel
          }
      }
      return args;
  }

Operating position
- Open a new URL and a new record, jump on this page
```
location.assign("https://ellenxx.com");
//或
window.location="https://ellenxx.com";
//或
location.href="http://ellenxx.com";
```
- Change the current page
  
  The location may be a hash, search, hostname and port property to the new value to change the current page.
```
//初始https://ellenxx.com/blog

//将Url设置为https://ellenxx.com/blog/#s
location.hash="#s";

//将Url设置为https://ellenxx.com/blog/?page=4
location.search="?page=4"
·······
```
- Prohibit click the "back" button to return to the previous page
  
  replace () method: receiving a parameter to the URL to navigate to after the jump can not be returned back to the previous page
```
setTimeout(function(){
            location.replace("http://ellenxx.com");
        },1000)
```
- Reload the current page
  
  reload () method: do not pass any parameters, the most effective way to reload, which is the last request is not changed, the page is loaded from cache; incoming true, will force a re-loaded from the server.
```
location.reload();//重新加载（有可能从缓存中加载）
location.reload(true);//重新加载（从服务器加载）
```

js a location object (BOM 2)

The location object

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