Window: sự kiện online

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

The online event of the Window interface is fired when the browser has gained access to the network and the value of Navigator.onLine switches to true.

Note: This event shouldn't be used to determine the availability of a particular website. Network problems or firewalls might still prevent the website from being reached.

Cú pháp

Sử dụng tên sự kiện trong các phương thức như addEventListener(), hoặc thiết lập thuộc tính trình xử lý sự kiện.

addEventListener("online", (event) => { })

ononline = (event) => { }

// addEventListener version
window.addEventListener("online", (event) => {
  console.log("You are now connected to the network.");
});

// ononline version
window.ononline = (event) => {
  console.log("You are now connected to the network.");
};