{"id":3355,"date":"2021-12-27T17:59:35","date_gmt":"2021-12-27T09:59:35","guid":{"rendered":"https:\/\/feizhaojun.com\/?p=3355"},"modified":"2021-12-27T17:59:51","modified_gmt":"2021-12-27T09:59:51","slug":"vue3-setup%e4%bd%bf%e7%94%a8%e6%a8%a1%e6%9d%bf%e5%bc%95%e7%94%a8refs","status":"publish","type":"post","link":"https:\/\/feizhaojun.com\/?p=3355","title":{"rendered":"Vue3 setup\u4f7f\u7528\u6a21\u677f\u5f15\u7528$refs"},"content":{"rendered":"<p>\u5728Vue2\u4e2d\uff0c\u6211\u4eec\u901a\u5e38\u8fd9\u4e48\u505a\u5b9e\u73b0\u4e00\u4e2a\u6a21\u677f\u5f15\u7528\uff1a<\/p>\n<pre><code class=\"language-html\">&lt;template&gt;\n  &lt;input ref=\"input\" \/&gt;\n&lt;\/template&gt;\n\n&lt;script&gt;\nexport default {\n  data() {},\n  methods: {\n    focusInput() {\n      this.$refs.input.focus();\n    }\n  },\n  mounted() {\n    this.focusInput();\n  }\n}\n&lt;\/script&gt;\n<\/code><\/pre>\n<p>\u5b98\u65b9\u6587\u6863\uff1a<a href=\"https:\/\/v3.cn.vuejs.org\/guide\/component-template-refs.html\">https:\/\/v3.cn.vuejs.org\/guide\/component-template-refs.html<\/a><\/p>\n<p>\u5728 Vue3 \u4e2d\u4f7f\u7528\u7ec4\u5408\u5f0fAPI\uff0c\u5b98\u65b9\u5728 setup() API \u4e2d\u89e3\u91ca\u8bf4\uff1a<\/p>\n<blockquote><p>\n  \u5728 setup() \u5185\u90e8\uff0cthis \u4e0d\u662f\u8be5\u6d3b\u8dc3\u5b9e\u4f8b\u7684\u5f15\u7528\uff0c\u56e0\u4e3a setup() \u662f\u5728\u89e3\u6790\u5176\u5b83\u7ec4\u4ef6\u9009\u9879\u4e4b\u524d\u88ab\u8c03\u7528\u7684\uff0c\u6240\u4ee5 setup() \u5185\u90e8\u7684 this \u7684\u884c\u4e3a\u4e0e\u5176\u5b83\u9009\u9879\u4e2d\u7684 this \u5b8c\u5168\u4e0d\u540c\u3002\u8fd9\u4f7f\u5f97 setup() \u5728\u548c\u5176\u5b83\u9009\u9879\u5f0f API \u4e00\u8d77\u4f7f\u7528\u65f6\u53ef\u80fd\u4f1a\u5bfc\u81f4\u6df7\u6dc6\u3002\n<\/p><\/blockquote>\n<p>\u6240\u4ee5\u6211\u4eec\u6ca1\u6709\u529e\u6cd5\u901a\u8fc7 <code>this.$refs<\/code> \u83b7\u53d6\u6a21\u677f\u5f15\u7528\u3002\u90a3\u5e94\u8be5\u600e\u4e48\u529e\u5462\uff1f<\/p>\n<p>\u5728 Vue3 \u4f9d\u65e7\u53ef\u4ee5\u5728\u7ec4\u4ef6\u5b9e\u4f8b\u4e0a\u627e\u5230 <code>$refs<\/code>\uff1a<\/p>\n<pre><code>import { getCurrentInstance } from 'vue';\n\n\/\/ \u83b7\u53d6\u5f53\u524d\u7ec4\u4ef6\u5b9e\u4f8b\nconst vm = getCurrentInstance();\n\/\/ \u627e\u5230 $refs\nsetTimeout(() =&gt; {\n  console.log(vm.ctx.$refs);\n}, 0);\n<\/code><\/pre>\n<h1>\u6ce8\u610f\uff01<\/h1>\n<p>\u56e0\u4e3a setup() \u8fd0\u884c\u65f6\uff0c\u7ec4\u4ef6\u5e76\u672a\u521d\u59cb\u5316\u5b8c\u6210\uff0c\u6240\u4ee5 $refs \u662f\u7a7a\u7684\u3002\u6240\u4ee5\u4e0a\u9762\u4ee3\u7801\u5c06\u653e\u5728\u4e86\u5ef6\u540e\u6267\u884c\u7684 setTimeout \u4e2d\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728Vue2\u4e2d\uff0c\u6211\u4eec\u901a\u5e38\u8fd9\u4e48\u505a\u5b9e\u73b0\u4e00\u4e2a\u6a21\u677f\u5f15\u7528\uff1a &lt;template&gt; &lt;input ref=&#8221;inpu&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[83],"tags":[],"class_list":["post-3355","post","type-post","status-publish","format-standard","hentry","category-vue"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/feizhaojun.com\/index.php?rest_route=\/wp\/v2\/posts\/3355","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/feizhaojun.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/feizhaojun.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/feizhaojun.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/feizhaojun.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3355"}],"version-history":[{"count":2,"href":"https:\/\/feizhaojun.com\/index.php?rest_route=\/wp\/v2\/posts\/3355\/revisions"}],"predecessor-version":[{"id":3357,"href":"https:\/\/feizhaojun.com\/index.php?rest_route=\/wp\/v2\/posts\/3355\/revisions\/3357"}],"wp:attachment":[{"href":"https:\/\/feizhaojun.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3355"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/feizhaojun.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3355"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/feizhaojun.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3355"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}