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A flawless way to instantiate XMLHttpRequest in javascript_javascript tips

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Release： 2016-05-16 18:18:46

Original

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Copy code The code is as follows:

 
function getHTTPRequest() 
{ 
var xhr = false ; 
if (window.XMLHttpRequest) 
xhr = new XMLHttpRequest(); //Browsers except IE
else if (window.ActiveXObject) 
{ 
try 
{ 
xhr = new ActiveXObject("Msxm12.XMLHTTP");//The latest version of ActiveX object 
} 
catch(e) 
{ 
try 
{ 
xhr = new ActiveXObject("Microsoft.XMLHTTP"); 
} 
catch(e) 
{ 
xhr = false; 
} 
} 
} 
} 
 

The following is an application example:

Copy the code The code is as follows:

 
//Complete GET request 
var request = getHTTPRequest(); 
if(request) 
{ 
request.onreadystatechange = dosomething; 
request.open("GET"," file.doc",true); 
request.send(null); 
} 

Related labels：

XMLHttpRequest

source：php.cn

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