{"id":2043,"date":"2022-08-28T23:29:34","date_gmt":"2022-08-28T15:29:34","guid":{"rendered":"https:\/\/yukihiew.com\/?p=2043"},"modified":"2023-06-27T15:45:26","modified_gmt":"2023-06-27T07:45:26","slug":"vue-warn-property-xxx-was-accessed-during-render-but-is-not-defined-on-instance","status":"publish","type":"post","link":"https:\/\/yukihiew.com\/vue-warn-property-xxx-was-accessed-during-render-but-is-not-defined-on-instance\/","title":{"rendered":"Vue3 \u5831\u932f &#8220;[Vue warn]: Property &#8220;xxx&#8221; was accessed during render but is not defined on instance.&#8221; \u89e3\u6c7a\u65b9\u6cd5\u4e4b\u4e00"},"content":{"rendered":"<h2 class=\"wp-block-heading\" id=\"vue-warn-%25e6%2583%2585%25e6%25b3%2581\">vue warn \u60c5\u6cc1<\/h2>\n\n\n<p>[Vue warn]: Property was accessed during render but is not defined on instance.<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"%25e8%25a2%25ab%25e5%25a0%25b1%25e9%258c%25af%25e7%259a%2584%25e6%2583%2585%25e6%25b3%2581\">\u88ab\u5831\u932f\u7684\u60c5\u6cc1<\/h2>\n\n\n<p>\u5f9eVue2\u91cd\u69cb\u81f3Vue3\u6642\u5831\u932f\uff0cvue2\u6642\u6709\u5831\u932f\u4f46\u4ecd\u53ef\u904b\u884c\uff1bvue3\u5831\u932f\u4e26\u963b\u64cb\u904b\u884c\u3002<br>*\u56e0\u70ba\u5c08\u6848\u95dc\u4fc2\u4e0d\u80fd\u4f7f\u7528async\/await\u8a9e\u6cd5\u3002<br>\u7236\u5143\u4ef6<\/p>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<pre class=\"wp-block-code\"><code>\/\/template\n&lt;div class=\"content\"&gt;\n  &lt;childrenComponent\n  :listData = \"listData\"\n  \/&gt;\n&lt;\/div&gt;<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/script\nexport default {\n  name:\"parentComponent\",\n  components:{\n    childrenComponent,\n  },\n  data() {\n    return {\n      listData: &#91; ],\n  },\ncreated(){\n initData();\n},\n  methods:{\n    initData(){\n    this.axios.get(\"\/api\/citycafe\/list\").then(res => {\n        console.log('citycafe',res.data);\n        if(res.data.array.length !== 0){\n          this.list_citycafe = res.data.array;\n        }\n      })\n      .catch(err=>{\n        console.log(\"\u932f\u8aa4\",err);\n      });\n    }\n  }\n}<\/code><\/pre>\n<\/div><\/div>\n\n\n\n<p>\u5b50\u5143\u4ef6 childrenComponent.vue<\/p>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<pre class=\"wp-block-code\"><code>\/\/template\n&lt;div class=\"content\">\n  {{ listData&#91;0].name }}\n&lt;\/div><\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/script\nexport default {\n  name:\"childrenComponent\",\n  props:&#91;\"listData\"],\n}<\/code><\/pre>\n<\/div><\/div>\n\n\n\n<p>\u51fa\u73fe\u5831\u932f<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"108\" src=\"https:\/\/i0.wp.com\/yukihiew.com\/wp-content\/uploads\/2022\/08\/image.png?resize=1024%2C108&#038;ssl=1\" alt=\"\" class=\"wp-image-2055\" srcset=\"https:\/\/i0.wp.com\/yukihiew.com\/wp-content\/uploads\/2022\/08\/image.png?resize=1024%2C108&amp;ssl=1 1024w, https:\/\/i0.wp.com\/yukihiew.com\/wp-content\/uploads\/2022\/08\/image.png?resize=300%2C32&amp;ssl=1 300w, https:\/\/i0.wp.com\/yukihiew.com\/wp-content\/uploads\/2022\/08\/image.png?resize=768%2C81&amp;ssl=1 768w, https:\/\/i0.wp.com\/yukihiew.com\/wp-content\/uploads\/2022\/08\/image.png?resize=1536%2C163&amp;ssl=1 1536w, https:\/\/i0.wp.com\/yukihiew.com\/wp-content\/uploads\/2022\/08\/image.png?w=1890&amp;ssl=1 1890w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n<h2 class=\"wp-block-heading\" id=\"%25e6%259b%25b4%25e6%25ad%25a3%25e5%25be%258c%25e7%259a%2584%25e6%2583%2585%25e6%25b3%2581\">\u66f4\u6b63\u5f8c\u7684\u60c5\u6cc1<\/h2>\n\n\n<p>\u5224\u65b7\uff1a\u61c9\u8a72\u662f\u56e0\u70bacall api\u6293\u5230\u8cc7\u6599\u524d\uff0c\u5b50\u5143\u4ef6\u751f\u6210\u537b\u6c92\u6709\u6293\u5230\u8cc7\u6599\uff0c\u6240\u4ee5\u8a2d\u4e00\u500bv-if\u5224\u65b7\uff0c\u6293\u5230\u8cc7\u6599\u5f8c\u518d\u6e32\u67d3\u5143\u4ef6\u3002<\/p>\n\n\n\n<p>\u7236\u5143\u4ef6<\/p>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<pre class=\"wp-block-code\"><code>\/\/template\n&lt;div class=\"content\" v-if=\"!isLoading\"&gt;\n  &lt;childrenComponent\n  :listData = \"listData\"\n  \/&gt;\n&lt;\/div&gt;<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/script\nexport default {\n  name:\"parentComponent\",\n  components:{\n    childrenComponent,\n  },\n  data() {\n    return {\n      isLoading: true,\n      listData: &#91; ],\n  },\ncreated(){\n initData();\n},\n  methods:{\n    initData(){\n    this.axios.get(\"\/api\/citycafe\/list\").then(res => {\n        console.log('citycafe',res.data);\n        \/\/\u5224\u65b7\u7684\u689d\u4ef6\u4e5f\u53ef\u4ee5\u6539\u6210\u8981\u6e32\u67d3\u7684\u9663\u5217\u9577\u5ea6\u662f\u5426\u70ba0\u3002\n        if(res.data.array.length !== 0){ \n          this.list_citycafe = res.data.array;\n          this.isLoading = false;\n        }\n      })\n      .catch(err=>{\n        console.log(\"\u932f\u8aa4\",err);\n      });\n    }\n  }\n}<\/code><\/pre>\n<\/div><\/div>\n\n\n\n<p>\u5b50\u5143\u4ef6 childrenComponent.vue<\/p>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<pre class=\"wp-block-code\"><code>\/\/template\n&lt;div class=\"content\">\n  {{ listData&#91;0].name }}\n&lt;\/div><\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/script\nexport default {\n  name:\"childrenComponent\",\n  props:&#91;\"listData\"],\n}<\/code><\/pre>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>vue warn \u60c5\u6cc1 [Vue warn]: Property was accessed during re [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2057,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","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":[124],"tags":[123],"class_list":["post-2043","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-124","tag-vue","entry","has-media"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Vue3 \u5831\u932f &quot;[Vue warn]: Property &quot;xxx&quot; was accessed during render but is not defined on instance.&quot; \u89e3\u6c7a\u65b9\u6cd5\u4e4b\u4e00 &#183; \u9019\u88e1\u662fYUKI<\/title>\n<meta name=\"description\" content=\"vue warn \u60c5\u6cc1 : Property was accessed during render but is not defined on instance. \u88ab\u5831\u932f\u7684\u60c5\u6cc1\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/yukihiew.com\/vue-warn-property-xxx-was-accessed-during-render-but-is-not-defined-on-instance\/\" \/>\n<meta property=\"og:locale\" content=\"zh_TW\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Vue3 \u5831\u932f &quot;[Vue warn]: Property &quot;xxx&quot; was accessed during render but is not defined on instance.&quot; \u89e3\u6c7a\u65b9\u6cd5\u4e4b\u4e00 &#183; \u9019\u88e1\u662fYUKI\" \/>\n<meta property=\"og:description\" content=\"vue warn \u60c5\u6cc1 : Property was accessed during render but is not defined on instance. \u88ab\u5831\u932f\u7684\u60c5\u6cc1\" \/>\n<meta property=\"og:url\" content=\"https:\/\/yukihiew.com\/vue-warn-property-xxx-was-accessed-during-render-but-is-not-defined-on-instance\/\" \/>\n<meta property=\"og:site_name\" content=\"\u9019\u88e1\u662fYUKI\" \/>\n<meta property=\"article:published_time\" content=\"2022-08-28T15:29:34+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-06-27T07:45:26+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/yukihiew.com\/wp-content\/uploads\/2022\/08\/vue-warn-1.png\" \/>\n\t<meta property=\"og:image:width\" content=\"600\" \/>\n\t<meta property=\"og:image:height\" content=\"400\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Yuki Hiew\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005:\" \/>\n\t<meta name=\"twitter:data1\" content=\"Yuki Hiew\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9810\u4f30\u95b1\u8b80\u6642\u9593\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 \u5206\u9418\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/yukihiew.com\/vue-warn-property-xxx-was-accessed-during-render-but-is-not-defined-on-instance\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/yukihiew.com\/vue-warn-property-xxx-was-accessed-during-render-but-is-not-defined-on-instance\/\"},\"author\":{\"name\":\"Yuki Hiew\",\"@id\":\"https:\/\/yukihiew.com\/#\/schema\/person\/472fc032409857a4f674434a6b357630\"},\"headline\":\"Vue3 \u5831\u932f &#8220;[Vue warn]: Property &#8220;xxx&#8221; 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