Write ajax instance using native js (recommended)

Updated: May 31, 2017 07:46:50 Submission: jingxian

Below, the editor will bring you an example of writing ajax using native js (recommended). The editor thinks it is quite good, so I will share it with you now and give you a reference. Let's take a look with the editor

Examples are as follows:

// Encapsulate ajax using native js// Compatible with xhr objectsfunction createXHR(){
  if(typeof XMLHttpRequest != "undefined"){ // Non-IE6 browser    return new XMLHttpRequest();
  }else if(typeof ActiveXObject != "undefined"){  // IE6 browser    var version = [
          ".6.0",
          ".3.0",
          "",
    ];
    for(var i = 0; i &lt; ; i++){
      try{
        return new ActiveXObject(version[i]);
      }catch(e){
        //jump over      }
    }
  }else{
    throw new Error("Your system or browser does not support XHR objects!");
  }
}
// Escape charactersfunction params(data){
  var arr = [];
  for(var i in data){
    (encodeURIComponent(i) + "=" + encodeURIComponent(data[i]));
  }
  return ("&amp;");
}
// Encapsulate ajaxfunction ga_ajax(obj){
  var xhr = createXHR();
   =  + "?rand=" + (); // Clear cache   = params();   // Escape string  if( === "get"){   // Determine whether the use of the get method to send     += ("?") == "-1" ? "?" +  : "&amp;" + ;
  }
  // Asynchronous  if( === true){
    // Onreadystatechange event needs to be triggered when asynchronous     = function(){
      // Execution is completed      if( == 4){
        callBack();
      }
    }
  }
  (,,); // false is synchronous true is asynchronous // "?rand="+()+"&name=ga&ga",  if( === "post"){
    ("Content-Type","application/x-www-form-urlencoded");
    ();
  }else{
    (null);
  }
  // (); // Cancel the asynchronous request  // Synchronize  if( === false){
    callBack();
  }
  // Return data  function callBack(){
    // Determine whether the return is correct    if( == 200){
      ();
    }else{
      ("Failed to get data, error code:"++"Error message is:"+);
    }
  }
}

var html = ("html")[0];
 = function(){
  ga_ajax({
    "method" : "post",
    "url" : "",
    "data" : {
      "name" : "gao",
      "age" : 100,
      "num" : "12346&amp;598"
    },
    "success" : function(data){
      alert(data);
    },
    "Error" : function(text){
      alert(text);
    },
    "async" : false
  });
}

The above article using native js to write ajax example (recommended) is all the content I share with you. I hope you can give you a reference and I hope you can support me more.

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Write ajax instance using native js (recommended)

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