{"id":1481,"date":"2023-06-13T14:04:11","date_gmt":"2023-06-13T06:04:11","guid":{"rendered":"https:\/\/usei.cn\/?p=1481"},"modified":"2024-04-15T14:08:08","modified_gmt":"2024-04-15T06:08:08","slug":"vue3-%e5%8d%87%e7%ba%a7%e6%8c%87%e5%8d%97","status":"publish","type":"post","link":"https:\/\/usei.cn\/index.php\/2023\/06\/13\/vue3-%e5%8d%87%e7%ba%a7%e6%8c%87%e5%8d%97\/","title":{"rendered":"Vue3 \u5347\u7ea7\u6307\u5357"},"content":{"rendered":"\n

vue3 \u751f\u547d\u5468\u671f\u51fd\u6570<\/h3>\n\n\n\n
setup<\/td><\/td><\/tr>
beforeCreate<\/td>\u751f\u6210\u4e4b\u524d<\/td><\/tr>
created<\/td>\u751f\u6210\u4e4b\u540e<\/td><\/tr>
beforeMount<\/td>\u7ec4\u4ef6\u5185\u5bb9\u88ab\u6e32\u67d3\u5230\u9875\u9762\u4e4b\u524d<\/td><\/tr>
mounted<\/td>\u7ec4\u4ef6\u5185\u5bb9\u88ab\u6e32\u67d3\u5230\u9875\u9762\u4e4b\u540e<\/td><\/tr>
beforeUpdate<\/td>\u5f53data\u4e2d\u7684\u6570\u636e\u53d1\u751f\u53d8\u5316\u524d<\/td><\/tr>
updated<\/td>\u5f53data\u4e2d\u7684\u6570\u636e\u53d1\u751f\u53d8\u5316\u540e<\/td><\/tr>
beforeUnmount<\/td>VUE\u5b9e\u4f8b\u4e0e\u5143\u7d20\u89e3\u9664\u7ed1\u5b9a\u524d<\/td><\/tr>
unmounted<\/td>VUE\u5b9e\u4f8b\u4e0e\u5143\u7d20\u89e3\u9664\u7ed1\u5b9a\u540e<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u5168\u5c40\u53d8\u91cf<\/h3>\n\n\n\n

vue2 \u4e2d \u5199\u6cd5 Vue.prototype.$appName = ‘My App’<\/p>\n\n\n\n

\u65b9\u6cd51<\/p>\n\n\n\n

import { provide, inject } from 'vue'\n\/\/\u8bbe\u7f6e\u53d8\u91cf\nprovide('globalVar', 2212121) \n\/\/ \u83b7\u53d6\u53d8\u91cf\ninject('globalVar') <\/code><\/pre>\n\n\n\n
\u65b9\u6cd52<\/p>\n\n\n\n
\/\/\u8bbe\u7f6e\nthis.$app.config.globalProperties.$globalVariable = 'My Awesome App'\n\/\/\u83b7\u53d6\nconst { proxy } =getCurrentInstance();\nconsole.info(proxy.$globalVariable);<\/code><\/pre>\n\n\n\n
vuex \u72b6\u6001\u7ba1\u7406 \u6362\u6210pinia<\/h3>\n\n\n\n
pinia\u4e2d\u6ca1\u6709\u4e86mutations\u548cmodules<\/strong>\uff0cpinia\u4e0d\u5fc5\u4ee5\u5d4c\u5957\uff08\u901a\u8fc7modules\u5f15\u5165\uff09\u7684\u65b9\u5f0f\u5f15\u5165\u6a21\u5757\uff0c\u56e0\u4e3a\u5b83\u7684\u6bcf\u4e2astore\u4fbf\u662f\u4e00\u4e2a\u6a21\u5757\uff0c\u5982storeA\uff0cstoreB… \u3002\u5728\u6211\u4eec\u4f7f\u7528Vuex\u7684\u65f6\u5019\u6bcf\u6b21\u4fee\u6539state\u7684\u503c\u90fd\u9700\u8981\u8c03\u7528mutations\u91cc\u7684\u4fee\u6539\u51fd\u6570\uff08\u4e0b\u9762\u4f1a\u8bf4\u5230\uff09\uff0c\u56e0\u4e3aVuex\u9700\u8981\u8ffd\u8e2a\u6570\u636e\u7684\u53d8\u5316\uff0c\u8fd9\u4f7f\u6211\u4eec\u5199\u8d77\u6765\u6bd4\u8f83\u7e41\u7410\u3002\u800cpinia\u5219\u4e0d\u518d\u9700\u8981mutations\uff0c\u540c\u6b65\u5f02\u6b65\u90fd\u53ef\u5728actions\u8fdb\u884c\u64cd\u4f5c\uff0c\u81f3\u4e8e\u5b83\u6ca1\u6709\u4e86mutations\u5177\u4f53\u662f\u5982\u4f55\u6700\u7ec8\u5230state\u53d8\u5316\u7684<\/p>\n\n\n\n
\u6ce8\u610f\uff1a\u4e0d\u80fd\u4f7f\u7528\u7bad\u5934\u51fd\u6570\u5b9a\u4e49action,\u56e0\u4e3a\u7bad\u5934\u51fd\u6570\u7ed1\u5b9a\u5916\u90e8this<\/strong><\/p>\n\n\n\n
import { useCounterStore } from '@\/stores\/counter'\n\nexport default {\n\n}<\/code><\/pre>\n\n\n\n
# vue2\nthis.$store.dispatch('Login', this.loginForm)\n# vue3\nimport { userStore } from '@\/store\/user'\nuserStore().Login(this.loginForm)\n<\/code><\/pre>\n\n\n\n
slot\u5199\u6cd5\u8c03\u6574<\/h3>\n\n\n\n
\/\/ vue2\nslot=\"content\"\n\/\/ vue3\nv-slot:content<\/code><\/pre>\n\n\n\n
v-mdoel<\/h3>\n\n\n\n
vue2\u7684\u5199\u6cd5<\/p>\n\n\n\n
\/\/ \u7236\u7ec4\u4ef6\n<my-component v-model=\"val\" \/>\n<my-component :value=\"val\" @input=\"val = arguments[0]\" \/>\n\n\/\/ \u5b50\u7ec4\u4ef6\n<template>\n   <input type=\"text\" :value=\"val\" @input=\"updateInput\" \/>\n<\/template>\n\n<script>\nexport default {\n  props: {\n    val: String\n  }     \n  methods: {\n    updateInput(e) {\n      this.$emit(\"input\", e.target.value)\n    }\n  }\n}\n<\/script><\/code><\/pre>\n\n\n\n
vue3 \u652f\u6301\u591a\u4e2av-model<\/p>\n\n\n\n
\/\/ \u7236\u7ec4\u4ef6\n<validate-input :rules=\"emailRules\" v-model=\"emailVal\" v-model:title=\"title\"><\/validate-input>\n\/\/ \u5b50\u7ec4\u4ef6\n<input type=\"text\" :value=\"modelValue\" @input=\"updateVal\" \/>\n        \n\/\/  1\u3001\u5b9a\u4e49prop\u5c5e\u6027\u53c2\u6570\nconst props = defineProps({\n      modelValue: string; \/\/ \u9ed8\u8ba4\u7684v-model\n});\n        \n\/\/  2\u3001\u5b9a\u4e49emit\u540d\u79f0\uff0cupdate+prop\u5c5e\u6027\nconst emit = defineEmits(['update:modelValue']);\n        \n\/\/ 3\u3001\u7ed1\u5b9ainput\u4e8b\u4ef6\uff0c\u4fee\u6539\u63d0\u4ea4\u7236\u7ec4\u4ef6\u4fee\u6539\u5c5e\u6027\u503c\uff0cchecked\u4e8b\u4ef6\u540c\u7406\n\nemit('update:modelValue', targetVal);\n     <\/code><\/pre>\n\n\n\n
watch<\/h3>\n\n\n\n
vue3 \u5199\u6cd5<\/p>\n\n\n\n
import {watch} from \"vue\";\nwatch(()=>props.modelValue,(newValue)=>{\n\n  value.value = newValue\n},{ immediate: true, deep: true })<\/code><\/pre>\n\n\n\n
this.$refs.xxx<\/h3>\n\n\n\n
vue2 \u4e2d\u53ef\u4ee5\u901a\u8fc7`this.$refs.xxx`\u83b7\u53d6\u9875\u9762\u7ec4\u4ef6 vue3\u4e2d\u5982\u4f55\u83b7\u53d6<\/p>\n\n\n\n
\/\/ \u8fd9\u8fb9\u53d8\u91cf\u7684\u540d\u5b57\u9700\u8981\u548c\u4e0a\u9762ref\u7684\u4e00\u81f4\u3002\u5982\u4f55\u76f4\u63a5\u6253\u5370formRef\uff0c\u8fd9\u4e2a\u65f6\u5019\u4f1a\u662f undefined\n\/\/ \u56e0\u4e3a\u9875\u9762\u7ec4\u4ef6\u8fd8\u6ca1\u6709\u6302\u8f7d\u5b8c\u6210\uff0c\u6240\u4ee5\u9700\u8981\u5728\u6302\u8f7d\u5b8c\u6210\u4e4b\u540e\u624d\u80fd\u6b63\u5e38\u4f7f\u7528\u3002\nconst formRef= ref();\n\n\/\/ \u8c03\u7528\u5b50\u7ec4\u4ef6\u51fd\u6570\n\/\/ \u7b2c\u4e00\u6b65\u5b50\u7ec4\u4ef6\u9700\u8981\u66b4\u9732\u51fd\u6570\ndefineExpose({\n  \u51fd\u6570\u540d\u79f0\n})\n\/\/ \u7b2c\u4e8c\u6b65  \u901a\u8fc7ref.value \u8c03\u7528\nformRef.value.\u51fd\u6570\u540d\u79f0\n\n<\/code><\/pre>\n\n\n\n
vue3\u4e2d\u7684provide\u548cinject<\/h3>\n\n\n\n
vue2\u4e2d\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7provide \u548c inject\u6765\u5b9e\u73b0\u7956\u5b59\u7ec4\u4ef6\u4e4b\u95f4\u7684\u6570\u636e\u4f20\u9012<\/p>\n\n\n\n
\/\/ \u7236\u66b4\u9732\u5bf9\u8c61\nprovide(\"itemRegister\",itemRegister)\n\/\/ \u5b50\u7ec4\u4ef6\u8c03\u7528\nconst itemRegister = inject(\"itemRegister\")\n<\/code><\/pre>\n\n\n\n
\u5bf9\u5916\u66b4\u9732\u5c5e\u6027\u6216\u65b9\u6cd5<\/h3>\n\n\n\n
defineExpose({\r\n  close\r\n})<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
vue3 \u751f\u547d\u5468\u671f\u51fd\u6570 setup beforeCreate \u751f\u6210\u4e4b\u524d created \u751f\u6210\u4e4b\u540e before […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16,8],"tags":[],"class_list":["post-1481","post","type-post","status-publish","format-standard","hentry","category-vue","category-frontend"],"_links":{"self":[{"href":"https:\/\/usei.cn\/index.php\/wp-json\/wp\/v2\/posts\/1481","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/usei.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/usei.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/usei.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/usei.cn\/index.php\/wp-json\/wp\/v2\/comments?post=1481"}],"version-history":[{"count":30,"href":"https:\/\/usei.cn\/index.php\/wp-json\/wp\/v2\/posts\/1481\/revisions"}],"predecessor-version":[{"id":2115,"href":"https:\/\/usei.cn\/index.php\/wp-json\/wp\/v2\/posts\/1481\/revisions\/2115"}],"wp:attachment":[{"href":"https:\/\/usei.cn\/index.php\/wp-json\/wp\/v2\/media?parent=1481"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/usei.cn\/index.php\/wp-json\/wp\/v2\/categories?post=1481"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/usei.cn\/index.php\/wp-json\/wp\/v2\/tags?post=1481"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}