How does uniapp determine the currently running platform?

With the rapid development of the mobile Internet, mobile applications have become an indispensable daily tool for people, and the difficulty of developing mobile applications has gradually been reduced. Front-end developers also have more choices when developing mobile applications, among which uniapp is a cross-platform development framework that has attracted much attention. This article will share how uniapp determines the currently running platform.

uniapp is a cross-platform development framework that supports multiple platforms, such as WeChat applet, Alipay applet, H5, Android, iOS, etc. During the development process, adjustments need to be made according to the characteristics of different platforms to ensure that the application can run normally on different platforms.

It is very important to determine the platform you are currently running on, because different platforms have different restrictions, different features, and different specifications. By judging the current platform, you can make targeted adjustments to improve application compatibility and operating efficiency.

uniapp provides a global variable $mp, and you can get the current running platform by accessing its properties. The details are as follows:

1. WeChat Mini Program Platform

if ($mp.platform === 'mp-weixin') {
  console.log('当前运行的是微信小程序平台');
}

2. Alipay Mini Program Platform

if ($mp.platform === 'mp-alipay') {
  console.log('当前运行的是支付宝小程序平台');
}

3. H5 Platform

if ($mp.platform === 'h5') {
  console.log('当前运行的是H5平台');
}

4. APP platform (including Android and iOS)

if ($mp.platform === 'app-plus') {
  console.log('当前运行的是APP平台');
}

It should be noted that the $mp variable is only available in uniapp, if used in other environments , you may get undefined or other error messages.

In addition, uniapp also provides some other global attributes, which are used to determine the type of device currently running, whether it is currently full screen, whether it currently supports native capsules, etc. For how to use these attributes, please refer to uniapp official document.

In actual development, the code needs to be written and adjusted differently according to different platforms to ensure that the application can run normally and stably on different platforms. At the same time, you also need to pay attention to the specifications, restrictions, and characteristics of different platforms in order to better develop high-quality mobile applications.

In short, by judging the current running platform, we can better understand the characteristics and limitations of applications on different platforms, which will help developers enhance their development capabilities and improve the operating efficiency and compatibility of applications.

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