Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Showing content from https://github.com/kaorun343/vue-property-decorator below:

kaorun343/vue-property-decorator: Vue.js and Property Decorator

This library is no longer actively maintained. If you still want to use classes, check out the community-maintained project vue-facing-decorator.

This library fully depends on vue-class-component, so please read its README before using this library.

MIT License

npm i -S vue-property-decorator

There are several decorators and 1 function (Mixin):

• @Prop
• @PropSync
• @Model
• @ModelSync
• @Watch
• @Provide
• @Inject
• @ProvideReactive
• @InjectReactive
• @Emit
• @Ref
• @VModel
• @Component (provided by vue-class-component)
• Mixins (the helper function named mixins provided by vue-class-component)

vuex-class

import { Vue, Component, Prop } from 'vue-property-decorator'

@Component
export default class YourComponent extends Vue {
  @Prop(Number) readonly propA: number | undefined
  @Prop({ default: 'default value' }) readonly propB!: string
  @Prop([String, Boolean]) readonly propC: string | boolean | undefined
}

is equivalent to

export default {
  props: {
    propA: {
      type: Number,
    },
    propB: {
      default: 'default value',
    },
    propC: {
      type: [String, Boolean],
    },
  },
}

1. Set emitDecoratorMetadata to true.
2. Import reflect-metadata before importing vue-property-decorator (importing reflect-metadata is needed just once.)

import 'reflect-metadata'
import { Vue, Component, Prop } from 'vue-property-decorator'

@Component
export default class MyComponent extends Vue {
  @Prop() age!: number
}

It's not supported to define each default property like @Prop() prop = 'default value' .

import { Vue, Component, PropSync } from 'vue-property-decorator'

@Component
export default class YourComponent extends Vue {
  @PropSync('name', { type: String }) syncedName!: string
}

is equivalent to

export default {
  props: {
    name: {
      type: String,
    },
  },
  computed: {
    syncedName: {
      get() {
        return this.name
      },
      set(value) {
        this.$emit('update:name', value)
      },
    },
  },
}

@PropSync works like @Prop besides the fact that it takes the propName as an argument of the decorator, and also creates a computed getter and setter behind the scenes. This way you can interface with the property as if it was a regular data property whilst making it as easy as appending the .sync modifier in the parent component.

import { Vue, Component, Model } from 'vue-property-decorator'

@Component
export default class YourComponent extends Vue {
  @Model('change', { type: Boolean }) readonly checked!: boolean
}

is equivalent to

export default {
  model: {
    prop: 'checked',
    event: 'change',
  },
  props: {
    checked: {
      type: Boolean,
    },
  },
}

@Model property can also set type property from its type definition via reflect-metadata .

import { Vue, Component, ModelSync } from 'vue-property-decorator'

@Component
export default class YourComponent extends Vue {
  @ModelSync('checked', 'change', { type: Boolean })
  readonly checkedValue!: boolean
}

is equivalent to

export default {
  model: {
    prop: 'checked',
    event: 'change',
  },
  props: {
    checked: {
      type: Boolean,
    },
  },
  computed: {
    checkedValue: {
      get() {
        return this.checked
      },
      set(value) {
        this.$emit('change', value)
      },
    },
  },
}

@ModelSync property can also set type property from its type definition via reflect-metadata .

import { Vue, Component, Watch } from 'vue-property-decorator'

@Component
export default class YourComponent extends Vue {
  @Watch('child')
  onChildChanged(val: string, oldVal: string) {}

  @Watch('person', { immediate: true, deep: true })
  onPersonChanged1(val: Person, oldVal: Person) {}

  @Watch('person')
  onPersonChanged2(val: Person, oldVal: Person) {}

  @Watch('person')
  @Watch('child')
  onPersonAndChildChanged() {}
}

is equivalent to

export default {
  watch: {
    child: [
      {
        handler: 'onChildChanged',
        immediate: false,
        deep: false,
      },
      {
        handler: 'onPersonAndChildChanged',
        immediate: false,
        deep: false,
      },
    ],
    person: [
      {
        handler: 'onPersonChanged1',
        immediate: true,
        deep: true,
      },
      {
        handler: 'onPersonChanged2',
        immediate: false,
        deep: false,
      },
      {
        handler: 'onPersonAndChildChanged',
        immediate: false,
        deep: false,
      },
    ],
  },
  methods: {
    onChildChanged(val, oldVal) {},
    onPersonChanged1(val, oldVal) {},
    onPersonChanged2(val, oldVal) {},
    onPersonAndChildChanged() {},
  },
}

import { Component, Inject, Provide, Vue } from 'vue-property-decorator'

const symbol = Symbol('baz')

@Component
export class MyComponent extends Vue {
  @Inject() readonly foo!: string
  @Inject('bar') readonly bar!: string
  @Inject({ from: 'optional', default: 'default' }) readonly optional!: string
  @Inject(symbol) readonly baz!: string

  @Provide() foo = 'foo'
  @Provide('bar') baz = 'bar'
}

is equivalent to

const symbol = Symbol('baz')

export const MyComponent = Vue.extend({
  inject: {
    foo: 'foo',
    bar: 'bar',
    optional: { from: 'optional', default: 'default' },
    baz: symbol,
  },
  data() {
    return {
      foo: 'foo',
      baz: 'bar',
    }
  },
  provide() {
    return {
      foo: this.foo,
      bar: this.baz,
    }
  },
})

These decorators are reactive version of @Provide and @Inject. If a provided value is modified by parent component, then the child component can catch this modification.

const key = Symbol()
@Component
class ParentComponent extends Vue {
  @ProvideReactive() one = 'value'
  @ProvideReactive(key) two = 'value'
}

@Component
class ChildComponent extends Vue {
  @InjectReactive() one!: string
  @InjectReactive(key) two!: string
}

The functions decorated by @Emit $emit their return value followed by their original arguments. If the return value is a promise, it is resolved before being emitted.

If the name of the event is not supplied via the event argument, the function name is used instead. In that case, the camelCase name will be converted to kebab-case.

import { Vue, Component, Emit } from 'vue-property-decorator'

@Component
export default class YourComponent extends Vue {
  count = 0

  @Emit()
  addToCount(n: number) {
    this.count += n
  }

  @Emit('reset')
  resetCount() {
    this.count = 0
  }

  @Emit()
  returnValue() {
    return 10
  }

  @Emit()
  onInputChange(e) {
    return e.target.value
  }

  @Emit()
  promise() {
    return new Promise((resolve) => {
      setTimeout(() => {
        resolve(20)
      }, 0)
    })
  }
}

is equivalent to

export default {
  data() {
    return {
      count: 0,
    }
  },
  methods: {
    addToCount(n) {
      this.count += n
      this.$emit('add-to-count', n)
    },
    resetCount() {
      this.count = 0
      this.$emit('reset')
    },
    returnValue() {
      this.$emit('return-value', 10)
    },
    onInputChange(e) {
      this.$emit('on-input-change', e.target.value, e)
    },
    promise() {
      const promise = new Promise((resolve) => {
        setTimeout(() => {
          resolve(20)
        }, 0)
      })

      promise.then((value) => {
        this.$emit('promise', value)
      })
    },
  },
}

import { Vue, Component, Ref } from 'vue-property-decorator'

import AnotherComponent from '@/path/to/another-component.vue'

@Component
export default class YourComponent extends Vue {
  @Ref() readonly anotherComponent!: AnotherComponent
  @Ref('aButton') readonly button!: HTMLButtonElement
}

is equivalent to

export default {
  computed() {
    anotherComponent: {
      cache: false,
      get() {
        return this.$refs.anotherComponent as AnotherComponent
      }
    },
    button: {
      cache: false,
      get() {
        return this.$refs.aButton as HTMLButtonElement
      }
    }
  }
}

import { Vue, Component, VModel } from 'vue-property-decorator'

@Component
export default class YourComponent extends Vue {
  @VModel({ type: String }) name!: string
}

is equivalent to

export default {
  props: {
    value: {
      type: String,
    },
  },
  computed: {
    name: {
      get() {
        return this.value
      },
      set(value) {
        this.$emit('input', value)
      },
    },
  },
}

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4