XMLHttpRequestEventTarget.onprogress - Web APIs 编辑

The XMLHttpRequestEventTarget.onprogress is the function called periodically with information when an XMLHttpRequest before success completely.

Syntax

XMLHttpRequest.onprogress = callback;

Values

• callback is the function to be called periodically before the request is completed.

Event

• event.loaded  the amount of data currently transfered.
• event.total  the total amount of data to be transferred.

XMLHttpRequest.onprogress = function (event) {
  event.loaded;
  event.total;
};

Example

var xmlhttp = new XMLHttpRequest(),
  method = 'GET',
  url = '/wiki/';

xmlhttp.open(method, url, true);
xmlhttp.onprogress = function () {
  //do something
};
xmlhttp.send();

Specifications

Browser compatibility

BCD tables only load in the browser