import Vue from 'vue'
import Component from 'vue-class-component'
// 表明此组件接受propMessage参数
@Component({
props: {
propMessage: String
}
})
export default class App extends Vue {
// 等价于 data() { return { msg: 'hello' } }
msg = 'hello';
// 等价于是 computed: { computedMsg() {} }
get computedMsg() {
return 'computed ' + this.msg
}
// 等价于 methods: { great() {} }
great() {
console.log(this.computedMsg())
}
}
import { Vue, Component, Prop, Watch, Emit } from 'vue-property-decorator'
@Component
export default class App extends Vue {
@Prop(Number) readonly propA: Number | undefined
@Prop({ type: String, default: ''}) readonly propB: String
// 等价于 watch: { propA(val, oldval) { ... } }
@Watch('propA')
onPropAChanged(val: String, oldVal: String) {
// ...
}
// 等价于 resetCount() { ... this.$emit('reset') }
@Emit('reset')
resetCount() {
this.count = 0
}
// 等价于 returnValue() { this.$emit('return-value', 10, e) }
@Emit()
returnValue(e) {
return 10
}
// 等价于 promise() { ... promise.then(value => this.$emit('promise', value)) }
@Emit()
promise() {
return new Promise(resolve => {
resolve(20)
})
}
}
