What browsers support Promise?

What browsers support Promise?

With the development of JavaScript, Promise has become a standard way to handle asynchronous programming. It is an object used to handle asynchronous operations, allowing us to write and understand asynchronous code more concisely.

Promise was first introduced in ECMAScript 6 (referred to as ES6, which is the sixth version of JavaScript), but not all browsers support all the features of ES6. Therefore, before choosing to use Promise, we need to first determine whether the target browser supports Promise.

Currently, most modern browsers already support Promise. Among them, the following is the support of some mainstream browsers:

1. Chrome: Chrome is one of the most widely used browsers. Starting from Chrome version 32, Promise is natively supported. Therefore, no additional plugins or settings are needed to use Promises with Chrome, whether on a computer or on a mobile phone.
2. Firefox: Firefox is also a popular browser. Starting from Firefox version 29, it begins to support Promise. Therefore, when using the Firefox browser, we can safely use Promise to handle asynchronous operations.
3. Safari: Safari is a browser developed by Apple. Starting from Safari 6 version, it supports Promise. Since Safari is the default browser on iOS devices, we can also use Promise to write asynchronous code on iPhone and iPad.
4. Opera: Opera is a multi-platform browser. Starting from Opera 19 version, it natively supports Promise. Therefore, Promises can be used both on desktop and mobile devices.

In addition to the above-mentioned mainstream browsers, there are also some other browsers that already support Promise, such as Edge browser, Internet Explorer 11, Samsung Internet and UC browser.

However, there are still cases where some older browsers do not support Promise, especially some older mobile browsers. In order to be compatible with these lower version browsers, we can use some libraries or shims, such as ES6-Promise and Babel, to fill the browser compatibility gap.

To sum up, most modern browsers such as Chrome, Firefox, Safari and Opera already support Promise natively. Some older browsers may need to use shims or other tools to be compatible with the use of Promises. If you need to use Promise during development, you can choose whether to use Promise-related functions based on the browser conditions of the target user group to ensure the normal operation of the code and a good user experience on different browsers.

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