<template>
  <div>
    foo:{{foo}}
    defaultArg:{{defaultArg}} | {{countplus}}
    <button @click="delToCount($event)">點擊del emit</button>
    <HellowWordComponent></HellowWordComponent>
    <button ref="aButton">ref</button>
  </div>
</template>
 
<script lang="ts">
import { Component, Vue, Prop, Emit, Ref } from 'vue-property-decorator';
import HellowWordComponent from '@/components/HellowWordComponent.vue';
 
@Component({
  components: {
    HellowWordComponent,
  },
  beforeRouteLeave(to: any, from: any, next: any) {
    console.log('beforeRouteLeave');
    next();
  },
  beforeRouteEnter(to: any, from: any, next: any) {
    console.log('beforeRouteLeave');
    next();
  },
})
 
export default class DemoComponent extends Vue {
  private foo = 'App Foo!';
 
  private count: number = this.$store.state.count;
 
  @Prop(Boolean) private defaultArg: string | undefined;
 
  @Emit('delemit') private delEmitClick(event: MouseEvent) {}
 
  @Ref('aButton') readonly ref!: HTMLButtonElement;
 
  // computed;
  get countplus () {
    return this.count;
  }
 
  created() {}
 
  mounted() {}
 
  beforeDestroy() {}
 
  public delToCount(event: MouseEvent) {
    this.delEmitClick(event);
    this.count += 1; // countplus 會累加
  }
 
}
 
</script>
 
<style lang="less">
...
</style>

<script lang="ts">
import { Component, Vue } from 'vue-property-decorator';
 
Component.registerHooks([
  'beforeRouteLeave',
  'beforeRouteEnter',
]);
 
@Component
export default class App extends Vue {
  beforeRouteLeave(to: any, from: any, next: any) {
    console.log('beforeRouteLeave');
    next();
  }
 
  beforeRouteEnter(to: any, from: any, next: any) {
    console.log('beforeRouteLeave');
    next();
  }
}
</script>

// 父組件:
<template>
  <div class="Props">
    <PropComponent :name="name" :age="age" :sex="sex"></PropComponent>
  </div>
</template>
 
<script lang="ts">
import {Component, Vue,} from 'vue-property-decorator';
import PropComponent from '@/components/PropComponent.vue';
 
@Component({
  components: {PropComponent,},
})
export default class PropsPage extends Vue {
  private name = '張三';
  private age = 1;
  private sex = 'nan';
}
</script>
 
// 子組件:
<template>
  <div class="hello">
    name: {{name}} | age: {{age}} | sex: {{sex}}
  </div>
</template>
 
<script lang="ts">
import {Component, Vue, Prop} from 'vue-property-decorator';
 
@Component
export default class PropComponent extends Vue {
   @Prop(String) readonly name!: string | undefined;
   @Prop({ default: 30, type: Number }) private age!: number;
   @Prop([String, Boolean]) private sex!: string | boolean;
}
</script>

// 父組件
<template>
  <div class="PropSync">
    <h1>父組件</h1>
    like:{{like}}
    <hr/>
    <PropSyncComponent :like.sync="like"></PropSyncComponent>
  </div>
</template>
 
<script lang='ts'>
import { Vue, Component } from 'vue-property-decorator';
import PropSyncComponent from '@/components/PropSyncComponent.vue';
 
@Component({components: { PropSyncComponent },})
export default class PropSyncPage extends Vue {
  private like = '父組件的like';
}
</script>
 
// 子組件
<template>
  <div class="hello">
    <h1>子組件:</h1>
    <h2>syncedlike:{{ syncedlike }}</h2>
    <button @click="editLike()">修改like</button>
  </div>
</template>
 
<script lang="ts">
import { Component, Prop, Vue, PropSync,} from 'vue-property-decorator';
 
@Component
export default class PropSyncComponent extends Vue {
  @PropSync('like', { type: String }) syncedlike!: string; // 用來實現(xiàn)組件的雙向綁定,子組件可以更改父組件穿過來的值
 
  editLike(): void {
    this.syncedlike = '子組件修改過后的syncedlike!'; // 雙向綁定,更改syncedlike會更改父組件的like
  }
}
</script>

// 父組件
<template>
  <div class="Model">
    <ModelComponent v-model="fooTs" value="some value"></ModelComponent>
    <div>父組件 app : {{fooTs}}</div>
  </div>
</template>
<script lang="ts">
import { Component, Vue } from 'vue-property-decorator';
import ModelComponent from '@/components/ModelComponent.vue';
 
@Component({ components: {ModelComponent} })
export default class ModelPage extends Vue {
  private fooTs = 'App Foo!';
}
</script>
 
// 子組件
<template>
  <div class="hello">
    子組件:<input type="text" :value="checked" @input="inputHandle($event)"/>
  </div>
</template>
 
<script lang="ts">
import {Component, Vue, Model,} from 'vue-property-decorator';
 
@Component
export default class ModelComponent extends Vue {
   @Model('change', { type: String }) readonly checked!: string
 
   public inputHandle(that: any): void {
     this.$emit('change', that.target.value); // 后面會講到@Emit,此處就先使用this.$emit代替
   }
}
</script>

<template>
  <div class="PropSync">
    <h1>child:{{child}}</h1>
    <input type="text" v-model="child"/>
  </div>
</template>
 
<script lang="ts">
import { Vue, Watch, Component } from 'vue-property-decorator';
 
@Component
export default class WatchPage extends Vue {
  private child = '';
 
  @Watch('child')
  onChildChanged(newValue: string, oldValue: string) {
    console.log(newValue);
    console.log(oldValue);
  }
}
</script>

// 父組件
<template>
  <div class="">
    點擊emit獲取子組件的名字<br/>
    姓名:{{emitData.name}}
    <hr/>
    <EmitComponent sex='女' @add-to-count="returnPersons" @delemit="delemit"></EmitComponent>
  </div>
</template>
 
<script lang="ts">
import { Vue, Component } from 'vue-property-decorator';
import EmitComponent from '@/components/EmitComponent.vue';
 
@Component({
  components: { EmitComponent },
})
export default class EmitPage extends Vue {
  private emitData = { name: '我還沒有名字' };
 
  returnPersons(data: any) {
    this.emitData = data;
  }
 
  delemit(event: MouseEvent) {
    console.log(this.emitData);
    console.log(event);
  }
}
</script>
 
// 子組件
<template>
  <div class="hello">
    子組件:
    <div v-if="person">
      姓名:{{person.name}}<br/>
      年齡:{{person.age}}<br/>
      性別:{{person.sex}}<br/>
    </div>
    <button @click="addToCount(person)">點擊emit</button>
    <button @click="delToCount($event)">點擊del emit</button>
  </div>
</template>
 
<script lang="ts">
import {
  Component, Vue, Prop, Emit,
} from 'vue-property-decorator';
 
type Person = {name: string; age: number; sex: string };
 
@Component
export default class PropComponent extends Vue {
  private name: string | undefined;
 
  private age: number | undefined;
 
  private person: Person = { name: '我是子組件的張三', age: 1, sex: '男' };
 
  @Prop(String) readonly sex: string | undefined;
 
  @Emit('delemit') private delEmitClick(event: MouseEvent) {}
 
  @Emit() // 如果此處不設置別名字,則默認使用下面的函數(shù)命名
  addToCount(p: Person) { // 此處命名如果有大寫字母則需要用橫線隔開  @add-to-count
    return this.person; // 此處不return,則會默認使用括號里的參數(shù)p;
  }
 
  delToCount(event: MouseEvent) {
    this.delEmitClick(event);
  }
}
</script>

<template>
  <div class="PropSync">
    <button @click="getRef()" ref="aButton">獲取ref</button>
    <RefComponent name="names" ref="RefComponent"></RefComponent>
  </div>
</template>
 
<script lang="ts">
import { Vue, Component, Ref } from 'vue-property-decorator';
import RefComponent from '@/components/RefComponent.vue';
 
@Component({
  components: { RefComponent },
})
export default class RefPage extends Vue {
  @Ref('RefComponent') readonly RefC!: RefComponent;
  @Ref('aButton') readonly ref!: HTMLButtonElement;
  getRef() {
    console.log(this.RefC);
    console.log(this.ref);
  }
}
</script>

// 最外層組件
<template>
  <div class="">
    <H3>ProvideInjectPage頁面</H3>
    <div>
      在ProvideInjectPage頁面使用Provide,ProvideReactive定義數(shù)據(jù),不需要props傳遞數(shù)據(jù)
      然后爺爺套父母,父母套兒子,兒子套孫子,最后在孫子組件里面獲取ProvideInjectPage
      里面的信息
    </div>
    <hr/>
    <provideGrandpa></provideGrandpa> <!--爺爺組件-->
  </div>
</template>
 
<script lang="ts">
import {
  Vue, Component, Provide, ProvideReactive,
} from 'vue-property-decorator';
import provideGrandpa from '@/components/ProvideGParentComponent.vue';
 
@Component({
  components: { provideGrandpa },
})
export default class ProvideInjectPage extends Vue {
  @Provide() foo = Symbol('fooaaa');
 
  @ProvideReactive() fooReactive = 'fooReactive';
 
  @ProvideReactive('1') fooReactiveKey1 = 'fooReactiveKey1';
 
  @ProvideReactive('2') fooReactiveKey2 = 'fooReactiveKey2';
 
  created() {
    this.foo = Symbol('fooaaa111');
    this.fooReactive = 'fooReactive111';
    this.fooReactiveKey1 = 'fooReactiveKey111';
    this.fooReactiveKey2 = 'fooReactiveKey222';
  }
}
</script>
 
// ...provideGrandpa調(diào)用父母組件
<template>
  <div class="hello">
    <ProvideParentComponent></ProvideParentComponent>
  </div>
</template>
 
// ...ProvideParentComponent調(diào)用兒子組件
<template>
  <div class="hello">
    <ProvideSonComponent></ProvideSonComponent>
  </div>
</template>
 
// ...ProvideSonComponent調(diào)用孫子組件
<template>
  <div class="hello">
    <ProvideGSonComponent></ProvideGSonComponent>
  </div>
</template>
 
 
// 孫子組件<ProvideGSonComponent>,經(jīng)過多層引用后,在孫子組件使用Inject可以得到最外層組件provide的數(shù)據(jù)哦
<template>
  <div class="hello">
    <h3>孫子的組件</h3>
    爺爺組件里面的foo:{{foo.description}}<br/>
    爺爺組件里面的fooReactive:{{fooReactive}}<br/>
    爺爺組件里面的fooReactiveKey1:{{fooReactiveKey1}}<br/>
    爺爺組件里面的fooReactiveKey2:{{fooReactiveKey2}}
    <span style="padding-left:30px;">=> fooReactiveKey2沒有些key所以取不到哦</span>
  </div>
</template>
 
<script lang="ts">
import {
  Component, Vue, Inject, InjectReactive,
} from 'vue-property-decorator';
 
@Component
export default class ProvideGSonComponent extends Vue {
  @Inject() readonly foo!: string;
 
  @InjectReactive() fooReactive!: string;
 
  @InjectReactive('1') fooReactiveKey1!: string;
 
  @InjectReactive() fooReactiveKey2!: string;
}
</script>