vue-property-decorator用法
如果想要在 vue2.0 中使用ts语法,需要引用 vue-property-decorator 这个第三方js库
此组件基本依赖于 vue-class-component 用于以下属性:
- @Component (完全继承于
vue-class-component
) - @Emit
- @Inject
- @Provice
- @Prop
- @Watch
- @Model
一.安装
npm install --save vue-property-decorator
二. ts页面中基本写法
import { Component, Vue, Inject } from "vue-property-decorator"; @Component({ components: {} }) export default class SubjectList extends Vue { dialogVisible: boolean = false; storageVisible: boolean = false; config: any = { style: "table-form", queryUrl: "Subject/GetAll", isCustom: true, params: {} }; created() { } }
可以看到,这里的变量,与钩子都属于同级,会少些一些代码
三.下面讲几个用的较多的几个属性
1.组件引用
import { Component, Vue, Inject } from "vue-property-decorator"; import addSelectProduct from "../../coupon/components/addSelectProduct/addSelectProduct.component.vue"; @Component({ components: { addSelectProduct, } }) export default class SubjectList extends Vue { dialogVisible: boolean = false; storageVisible: boolean = false; config: any = { style: "table-form", queryUrl: "Subject/GetAll", isCustom: true, params: {} }; created() { } }
2. watch 监听属性
import { Component, Vue, Inject,Watch } from "vue-property-decorator"; @Component({ components: {} }) export default class SubjectList extends Vue { dialogVisible: boolean = false; storageVisible: boolean = false; config: any = { style: "table-form", queryUrl: "Subject/GetAll", isCustom: true, params: {} }; productList: any = [] // 监听属性 @Watch("dialogVisible") onCountChanged(val: any, oldVal: any) { console.log(val); }// 监听属性 @Watch("productList",{ deep: true }) onCountChanged2(val: any, oldVal: any) { console.log(val); } created() { } }
- 通过引用 Watch, @watch()中第一个参数为: 监听的属性名, 第二个参数为可选对象(可用来监听对象,数组复杂类型)
- 当监听多个属性值时, 同法往下累加, 注意:定义监听函数的名字不能相同,如上例:onCountChanged 和 onCountChanged2
3.计算属性
import { Component, Vue, Inject } from "vue-property-decorator"; @Component({ components: {} }) export default class SubjectList extends Vue { dialogVisible: boolean = false; storageVisible: boolean = false; config: any = { style: "table-form", queryUrl: "Subject/GetAll", isCustom: true, params: {} }; limitType : number = 0 // 计算属性 get shouldEdit() { return !router.currentRoute.query.id; } get getButtonName() { let type: any = { 1: '拼团', 2: '限时折扣', }; return type[this.limitType]; } created() { } }
- 使用时只需以 get 开头 + 方法 + 有返回值
4. 混入公共方法 mixins
import { Component, Vue, Inject } from "vue-property-decorator"; import PublicMethod from '@/plugins/mixins/provides/service/publicMethod'; @Component({ components: {}, mixins:[PublicMethod] }) export default class SubjectList extends Vue { dialogVisible: boolean = false; storageVisible: boolean = false; config: any = { style: "table-form", queryUrl: "Subject/GetAll", isCustom: true, params: {} }; created() { (<any>this).WxShare({ infoId : this.config.params.id , infoType : 7 }); } }
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