vue3 使用 data、computed、methods
简单数据ref
复杂数据reactive
使用方法:
// useCount.jsimport {ref,reactive,computed} from 'vue'
export default function useCount() {
// 简单数据定义及使用
let count = ref(0)
function addCount() {
count.value++
}
// 复杂数据定义级修改
let count_obj = reactive({
val:10
})
let changeCountObj = ()=> {
count_obj.val = count.value;
}
// 计算变量
let count_dobule = computed(()=>{
return count.value*2
})
return {count, addCount,count_obj, changeCountObj,count_dobule}
}
组件中使用
// Home.vue<template>
<div>
<button @click="addCount">count is {{count}}</button>
<button @click="changeCountObj">点击同步count值:{{count_obj.val}}</button>
<div>count的两倍是:{{count_dobule}}</div>
</div>
</template>
<script>
import useCount from "./useCount";
export default {
setup() {
let {count, addCount,count_obj,changeCountObj,count_dobule} = useCount();
return {
count, addCount,count_obj,changeCountObj,count_dobule
}
}
}
</script>
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