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推荐整理分享vue3+element-plus Dialog对话框的使用 与 setup 写法的使用,希望有所帮助,仅作参考,欢迎阅读内容。
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方式一:通过v-model的方式实现子组件的显示与隐藏
父组件的内容<template> <div> <el-button @click="open">打开</el-button> <Child v-model:visible="flag" ></Child> </div></template><script> import { ref, watch } from 'vue' import Child from "../components/Child.vue" export default { components: { Child }, setup() { const flag = ref(false) const open = () => { flag.value = true } watch(() => flag.value , (val) => { console.log("监听flag值得变化:", val) }) return { flag, open } } }</script>子组件内容<template> <div class="hello"> <el-dialog title="提示" v-model="dialogVisble" width="30%" :before-close="close"> <span>这是一段信息</span> <template #footer> <span class="dialog-footer"> <el-button @click="close">取 消</el-button> <el-button type="primary" @click="confirm">确 定</el-button> </span> </template> </el-dialog> </div></template><script> import { ref, watch } from 'vue' export default { props: { visible: { type: Boolean, default: false } }, setup(props, ctx) { const dialogVisble = ref(false) const close = () => { ctx.emit("update:visible", false); }; const confirm = () => { console.log('你点击了确定按钮') ctx.emit("update:visible", false); } watch(() => props.visible, (val) => { console.log(props.visible, val); dialogVisble.value = val }); return { dialogVisble, confirm, close } } }</script>方式二:通过为元素绑定ref的方式实现子组件的显示与隐藏
父组件的内容<template> <div> <el-button @click="open">打开</el-button> <Child ref="visibleDialog"></Child> </div></template><script> import { ref } from 'vue' import Child from "../components/Child.vue" export default { components: { Child }, setup() { const visibleDialog = ref(null) const open = () => { visibleDialog.value.dialogVisble = true } return { visibleDialog, open } } }</script>子组件内容<template> <div class="hello"> <el-dialog title="提示" v-model="dialogVisble" width="30%" :before-close="close"> <span>这是一段信息</span> <template #footer> <span class="dialog-footer"> <el-button @click="close">取 消</el-button> <el-button type="primary" @click="confirm">确 定</el-button> </span> </template> </el-dialog> </div></template><script> import { ref } from 'vue' export default { setup(props, ctx) { const dialogVisble = ref(false) const confirm = () => { console.log('你点击了确定按钮') dialogVisble.value = false } const close = () => { dialogVisble.value = false } return { dialogVisble, confirm, close } } }</script>2. setup语法糖写法父组件<template> <Child :user="user" ref="visiableDialog"></Child> <el-button type="primary" @click="openDialog">打开弹窗</el-button></template><script setup>import { reactive, ref } from 'vue'import Child from "../components/childComponents.vue"const visiableDialog = ref(null)const user = reactive({ name: '张三', age: 20})function openDialog() { visiableDialog.value.dialogVisble = true console.log(visiableDialog.value.dialogVisble);}</script>子组件<template> <div class="hello">{{ `${props.user.name}在学习VUE3` }}</div> <el-dialog title="提示" v-model="dialogVisble" width="30%"> <span>这是一段信息</span> <template #footer> <span class="dialog-footer"> <el-button @click="close">取 消</el-button> <el-button type="primary" @click="confirm">确 定</el-button> </span> </template> </el-dialog></template><script setup>import { ref } from 'vue';import { ElMessageBox } from 'element-plus'// 定义控制弹窗显隐的变量const dialogVisble = ref(false)// 接受父组件传过来的值// const props = defineProps({// user: {// type: Object,// default: {}// }// })// 或者const props = defineProps(['user'])function confirm() { ElMessageBox.confirm('确定关闭吗?').then(() => { console.log('你点击了确定按钮') dialogVisble.value = false }).catch(() => { })}function close() { dialogVisble.value = false}// 将变量暴露出来defineExpose({ dialogVisble})</script>总结:
对于传统写法两种方式来看,都有各自的优缺点,方式一在写法上虽然麻烦了些,但是符合vue的设计原则,尽量少的操作Dom,以操作数据的方式达到了预期的目的。而方式二看起来趋向于我们在vue2中的写法,虽然在写法上简便,但是在原理上则是操作了Dom,总之,两种方式都可以达到我们想要的结果,至于使用那种方式看个人编写代码的习惯吧。对于使用setup语法糖写法来看,代码整体比较整洁,写起来也相对方便快捷上一篇:vue2项目之swiper.js 的使用(vue中使用swiper6)
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