Tips for using mixins to reuse form components in Vue

Tips on using mixins to reuse form components in Vue

In Vue, form components are one of the most frequently used components. In some specific cases, we may need to reuse some form components to improve our code reusability and reduce redundant code. The mixin function in Vue can help us reuse form components.

What is mixin

mixin is a commonly used method of combined code reuse in Vue, similar to the concept of "multiple inheritance", which allows us to share between multiple components Some common code instead of writing it repeatedly for every component. A mixin can have multiple properties and methods and can be mixed within a component instance.

Vue.mixin() receives a mixin object as a parameter and applies it to the global Vue instance and all component instances, which means that each component instance can use the properties and methods defined in the mixin.

Use mixin to implement form component reuse

When writing form components, you usually need to define some logic and properties. Some of these properties and methods can be reused in multiple components. Mixin provides a a convenient way to achieve this goal.

Sample code:

const formMixin = {
  data() {
    return {
      formData: {},
    };
  },
  methods: {
    resetForm() {
      this.formData = {};
    },
    submitForm() {
      // ... 提交表单逻辑
    },
    validateForm() {
      // ... 表单校验逻辑
    },
  },
}

Vue.mixin(formMixin);

In the above code, we define a formMixin, which contains some public properties and methods of form components, such as formData, resetForm, submitForm and validateForm. Then call Vue.mixin(formMixin) as a global mixin, making these public properties and methods available to all component instances.

Next, we can use these properties and methods in the component without having to write them again:

Vue.component('my-form', {
  mixins: [formMixin],
  template: `
     <form>
        <input type="text" v-model="formData.name">
        <input type="text" v-model="formData.email">
        <button @click.prevent="submitForm">Submit</button>
     </form>
  `
})

In the sample code above, we define a file named my-form component, and specify mixins as [formMixin], indicating that the component will be mixed into the properties and methods in formMixin. In the component's template, we can use formData, resetForm, submitForm and validateForm properties and methods defined in the mixin.

Summary

Using mixins can help us reuse form components, and can also improve the readability and maintainability of the code. When writing components, you need to pay attention to avoid mixins that are too complex and have too many dependencies, so as not to affect the reusability and maintainability of the code.

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