{"id":3478,"date":"2022-03-11T16:30:39","date_gmt":"2022-03-11T08:30:39","guid":{"rendered":"https:\/\/feizhaojun.com\/?p=3478"},"modified":"2022-03-11T16:31:51","modified_gmt":"2022-03-11T08:31:51","slug":"vue3%e7%9a%84setup%e4%b8%ad%e4%bd%bf%e7%94%a8ref%e8%8e%b7%e5%8f%96dom%e5%85%83%e7%b4%a0","status":"publish","type":"post","link":"https:\/\/feizhaojun.com\/?p=3478","title":{"rendered":"Vue3\u7684setup\u4e2d\u4f7f\u7528ref\u83b7\u53d6dom\u5143\u7d20"},"content":{"rendered":"<h1>\u80cc\u666f\u95ee\u9898<\/h1>\n<ul>\n<li>\u5728vue3\u4e2dinput\u5982\u4f55\u83b7\u53d6\u7126\u70b9\uff1f<\/li>\n<li>vue3 setup\u8bed\u6cd5\u7cd6\u5982\u4f55\u83b7\u53d6dom\u5143\u7d20\uff1f<\/li>\n<\/ul>\n<h1>vue2 \u7684\u65b9\u6cd5<\/h1>\n<p>\u5728 vue2 \u4e2d\uff0c\u5728\u7ec4\u4ef6\u4e0a\u8bbe\u7f6e ref \u5c5e\u6027\u4e4b\u540e\uff0c\u5c31\u53ef\u4ee5\u901a\u8fc7 <code>this.$refs.ref<\/code> \u8bbf\u95ee\u5230\u5bf9\u5e94\u7684 DOM \u5143\u7d20\u3002<\/p>\n<pre><code>&lt;input type=\"text\" ref=\"inputRef\" \/&gt;\n<\/code><\/pre>\n<p>\u5728 JavaScript \u4e2d\u53ef\u4ee5\u8bbf\u95ee\uff1a<\/p>\n<pre><code>this.$refs.usernameInput\n<\/code><\/pre>\n<p>\u5982\u679c\u9700\u8981\u805a\u7126\u5230\u8f93\u5165\u6846\uff1a<\/p>\n<pre><code>this.$refs.usernameInput.focus()\n<\/code><\/pre>\n<h1>vue3<\/h1>\n<p>vue3 \u4e2d\u6ca1\u6709 $refs\uff0c\u800c\u4e14\u6ca1\u6709 this\uff0c\u53ef\u4ee5\u4f7f\u7528 ref() API \u6765\u5b9e\u73b0\uff1a<\/p>\n<pre><code>&lt;template&gt;\n  &lt;input type=\"text\" ref=\"inputRef\" \/&gt;\n  &lt;span @click=\"handleFocus\"&gt;focus&lt;\/span&gt;\n&lt;\/template&gt;\n\n&lt;script lang=\"ts\" setup&gt;\nimport { ref } from \"vue\";\n\nconst inputRef = ref();\n\nconsole.log(inputRef.value); \/\/ undefined\uff01\u9875\u9762\u5143\u7d20\u5c1a\u672a\u6e32\u67d3\n\nonMounted(() =&gt; {\n  console.log(inputRef.value); \/\/ \u53ef\u4ee5\u62ff\u5230 input \u5143\u7d20\uff01\n});\n\nconst handleFocus = () =&gt; {\n  inputRef.value.focus(); \/\/ \u6210\u529f\u805a\u7126\n};\n&lt;\/script&gt;\n<\/code><\/pre>\n<h1>\u5982\u679c\u662f\u591a\u4e2a input \u5143\u7d20\u5462\uff1f<\/h1>\n<p>\u5982\u679c\u6bcf\u4e2a\u8f93\u5165\u6846\u5bf9\u5e94\u4e00\u4e2a focus \u6309\u94ae\uff0c\u90a3\u6211\u4eec\u53ef\u4ee5\u628a\u5b83\u4eec\u5c01\u88c5\u6210\u4e00\u4e2a Vue \u7ec4\u4ef6\uff0c\u8fd9\u6837\u6bcf\u4e2a\u7ec4\u4ef6\u4e2d\u5c31\u53ea\u6709\u4e00\u4e2a input \u5566\uff01<\/p>\n<p>\u53e6\u5916\uff0c\u53ef\u4ee5\u901a\u8fc7\u6570\u7ec4\u6765\u5b9e\u73b0\uff1a<\/p>\n<pre><code>&lt;template&gt;\n  &lt;div v-for=\"(item, index) in data\"&gt;\n    &lt;input type=\"text\" :ref=\"inputRef\" \/&gt;\n    &lt;span @click=\"handleFocus(index)\"&gt;focus&lt;\/span&gt;\n  &lt;\/div&gt;\n&lt;\/template&gt;\n\n&lt;script lang=\"ts\" setup&gt;\nimport { ref } from \"vue\";\nconst data = [1, 2, 3, 4, 5];\n\nconst refArr = ref([]);\nconst inputRef = (el) =&gt; {\n  refArr.value.push(el);\n};\n\nconst handleFocus = (index) =&gt; {\n  refArr.value[index].focus();\n};\n&lt;\/script&gt;\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u80cc\u666f\u95ee\u9898 \u5728vue3\u4e2dinput\u5982\u4f55\u83b7\u53d6\u7126\u70b9\uff1f vue3 setup\u8bed\u6cd5\u7cd6\u5982\u4f55\u83b7\u53d6dom\u5143\u7d20\uff1f vue2 \u7684\u65b9\u6cd5 \u5728 v&#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":[83,3,5],"tags":[],"class_list":["post-3478","post","type-post","status-publish","format-standard","hentry","category-vue","category-fe","category-javascript"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/feizhaojun.com\/index.php?rest_route=\/wp\/v2\/posts\/3478","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=3478"}],"version-history":[{"count":2,"href":"https:\/\/feizhaojun.com\/index.php?rest_route=\/wp\/v2\/posts\/3478\/revisions"}],"predecessor-version":[{"id":3480,"href":"https:\/\/feizhaojun.com\/index.php?rest_route=\/wp\/v2\/posts\/3478\/revisions\/3480"}],"wp:attachment":[{"href":"https:\/\/feizhaojun.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3478"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/feizhaojun.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3478"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/feizhaojun.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3478"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}