vue組件的繼承適用於UI幾乎一樣,只是數據不一樣的情況下,但是這種情況通過統一封裝組件也是能實現的,小功能建議用封裝,大功能建議用組件繼承,因爲大功能在結合搜參數的需要多重的判斷,這樣會導致封裝的組件比較繁雜,出現過多的判斷,用繼承可以改寫基類中的方法和數據
下面來看個例子
基類:
<!--
* @Author: your name
* @Date: 2020-05-26 15:22:12
* @LastEditTime: 2020-05-27 11:40:49
* @LastEditors: Please set LastEditors
* @Description: In User Settings Edit
* @FilePath: \vue-element-admin-master\src\views\test\base.vue
-->
<template>
<div>父類:{{this.a}}
<span>{{title}}</span>
</div>
</template>
<script>
export default {
components: {},
data () {
return {
a:6,
title:''
};
},
created() {
console.log('base',this.a)
},
computed: {},
mounted() {},
methods: {
add(){
console.log('父類方法')
}
}
}
</script>
<style lang='scss' scoped>
</style>
不改寫基類的例子:
<!--
* @Author: your name
* @Date: 2019-12-20 16:04:14
* @LastEditTime: 2020-05-27 11:41:27
* @LastEditors: Please set LastEditors
* @Description: In User Settings Edit
* @FilePath: \vue-element-admin-master\src\views\test\index.vue
-->
<script>
import base from "./base";
export default {
extends: base,
name: "test",
components: {},
data() {
return {
};
},
created() {
console.log(this)
console.log("子類不改寫", this.a);
this.add()
this.title ='不改寫'
},
computed: {},
methods: {
},
mounted() {}
};
</script>
結果:
可以看見,不該寫基類的時候,繼承了父類的所有東西,當前的data,dom,方法都繼承了
下面看改寫父類:
<!--
* @Author: your name
* @Date: 2019-12-20 16:04:14
* @LastEditTime: 2020-05-27 13:57:59
* @LastEditors: Please set LastEditors
* @Description: In User Settings Edit
* @FilePath: \vue-element-admin-master\src\views\test\index.vue
-->
<template>
<div>子類改寫</div>
</template>
<script>
import base from "./base";
export default {
extends: base,
name: "test1",
components: {},
data() {
return {
a: 3
};
},
created() {
this.title ='改寫'
console.log("子類改寫參數", this.a);
},
computed: {},
methods: {
add(){
console.log('子類改寫方法')
}
},
mounted() {}
};
</script>
結果:
控制檯:
我們會發現,改寫後基類的值也被覆寫了,方法也被覆寫了,html模板也完全被改寫了
HTML
模板要麼完全繼承,要麼完全重寫,不能按需繼承某個部分。如果子類在結構上跟基類有所差異,還是需要在基類中做條件判斷。如果模板差異太大,可以重新定義子類自己的template
,至少還可以重用一部分業務邏輯代碼。