Vue determines the request device

With the development of mobile Internet, more and more websites and applications need to respond and process differently according to the type of user device, screen size and other characteristics to provide a better user experience. When developing web front-end applications, it is often necessary to determine the user's device type in order to provide different interfaces and behaviors.

Vue.js is a popular front-end framework that can help us achieve component development, data binding and other functions. In Vue.js, determining the user's device type can be achieved in the following ways.

Use window.navigator.userAgent

window.navigator.userAgent is a string that contains information such as the browser manufacturer, version number, and operating system. We can determine the user's device type by detecting certain keywords in userAgent.

The sample code is as follows:

const isMobile = /iPhone|iPad|iPod|Android/i.test(window.navigator.userAgent);

This code uses regular expressions to detect whether the userAgent value contains the keywords iPhone, iPad, iPod or Android to determine whether the device is a mobile device. If true is returned, the device is mobile.

Use window.matchMedia

window.matchMedia is a JavaScript API that can monitor screen media queries and determine the width, height and other characteristics of the device screen. We can determine the device type by setting different media queries.

The sample code is as follows:

const isMobile = window.matchMedia('(max-width: 768px)').matches;

This code indicates that if the screen width is less than or equal to 768 pixels, the device is a mobile device.

Using the computed attribute of Vue.js

In Vue.js, we can use the computed attribute to calculate the attribute value. When the attribute value changes, the calculated attribute will be automatically updated. Through the computed attribute, we can calculate different component properties based on the current device type.

The sample code is as follows:

<template>
  <div>
    <h1 v-if="isMobile">Mobile Device</h1>
    <h1 v-else>Desktop Device</h1>
  </div>
</template>

<script>
export default {
  computed: {
    isMobile () {
      return /iPhone|iPad|iPod|Android/i.test(window.navigator.userAgent);
    }
  }
};
</script>

In this code, when isMobile returns true, "Mobile Device" is displayed, otherwise "Desktop Device" is displayed.

Use third-party libraries

In addition to the above methods, we can also use some third-party libraries to determine the device type, such as device.js, bowser, Detect.js, etc. These libraries provide more complete device judgment functions, including detecting device type, browser type, operating system and other information, and are suitable for more complex scenarios.

The sample code is as follows:

import device from 'device.js';

const isMobile = device.mobile();

This code uses the mobile() method of the device.js library to determine whether the device is a mobile device.

In short, it is a very simple thing to determine the request device in Vue.js. We can choose different methods according to the needs of users, implement device type judgment in the code, and provide different responses and processing to provide users with a better user experience.

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