Introduction to common Vue functions and how to use them

Introduction to Vue’s common functions and how to use them

With the popularity and application of Vue.js becoming more and more widespread, Vue’s common functions have also become an indispensable part of front-end development. This article will introduce some commonly used Vue functions and provide code examples so that readers can better understand and use these functions.

1. Vue.extend()
   The Vue.extend() function is a method used to create reusable components. It receives an object as a parameter, and the properties and methods of the object will be used as components. Definition.
   The following is a simple example of using the Vue.extend() function to create a component:

var MyComponent = Vue.extend({
  template: '<div>这是一个自定义组件</div>'
})

2. Vue.component()
   The Vue.component() function is used to register Global component methods can directly use registered components in multiple Vue instances.
   The following is an example of using the Vue.component() function to register a global component:

Vue.component('my-component', {
  template: '<div>这是一个全局组件</div>'
})

3. Vue.directive()
   The Vue.directive() function is used to register The method of global directives. Directives are special HTML attributes used to change the behavior or style of elements.
   The following is an example of using the Vue.directive() function to register a global directive:

Vue.directive('my-directive', {
  bind: function (el, binding, vnode) {
    // 指令绑定时的操作
  },
  update: function (el) {
    // 当指令的绑定值更新时的操作
  }
})

4. Vue.filter()
   The Vue.filter() function is used to register Global filter methods, filters can be used to process the display format of data.
   The following is an example of using the Vue.filter() function to register a global filter:

Vue.filter('currency', function (value) {
  return '￥' + Number(value).toFixed(2)
})

5. Vue.mixin()
   The Vue.mixin() function is used to Globally mix the same options into all Vue instances. You can use this function to mix in options before the Vue instance is created.
   The following is an example of using the Vue.mixin() function to globally mix options:

Vue.mixin({
  created: function () {
    // 混入的选项回调
  }
})

6. Vue.prototype.$nextTick()
   Vue.prototype.$nextTick( ) function is a method used to perform some operations after the DOM is updated.
   The following is an example of using the Vue.prototype.$nextTick() function:

Vue.component('my-component', {
  template: '<div>{{ message }}</div>',
  data: function () {
    return {
      message: 'Hello Vue.js!'
    }
  },
  mounted: function () {
    this.message = 'Hello World!'
    this.$nextTick(function () {
      // DOM已更新
      console.log('DOM已更新')
    })
  }
})

The above is an introduction and usage examples of some commonly used Vue functions. These functions can help developers better Use Vue.js to build maintainable and reusable front-end applications. I hope this article can be helpful to readers in their Vue.js development.

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