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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