{"id":10435,"date":"2024-03-14T12:07:42","date_gmt":"2024-03-14T12:07:42","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-solve-the-issue-of-not-being-able-to-watch-props-in-vue\/"},"modified":"2025-08-03T23:29:19","modified_gmt":"2025-08-03T23:29:19","slug":"how-to-solve-the-issue-of-not-being-able-to-watch-props-in-vue","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-solve-the-issue-of-not-being-able-to-watch-props-in-vue\/","title":{"rendered":"Watch Vue Props with Computed Properties"},"content":{"rendered":"<p>In Vue, props are data passed from a parent component to a child component, and the child component cannot directly watch props. However, you can monitor props by using computed properties in the child component.<\/p>\n<p>For example, in the scenario where a parent component passes a prop called myProp to a child component, we can use a computed property in the child component to monitor changes in myProp.<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">export<\/span> <span class=\"hljs-keyword\">default<\/span> {\r\n  <span class=\"hljs-attr\">props<\/span>: [<span class=\"hljs-string\">'myProp'<\/span>],\r\n  <span class=\"hljs-attr\">computed<\/span>: {\r\n    <span class=\"hljs-title function_\">myPropWatcher<\/span>(<span class=\"hljs-params\"><\/span>) {\r\n      <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-variable language_\">this<\/span>.<span class=\"hljs-property\">myProp<\/span>;\r\n    }\r\n  },\r\n  <span class=\"hljs-attr\">watch<\/span>: {\r\n    <span class=\"hljs-title function_\">myPropWatcher<\/span>(<span class=\"hljs-params\">newVal, oldVal<\/span>) {\r\n      <span class=\"hljs-comment\">\/\/ \u5904\u7406myProp\u7684\u53d8\u5316<\/span>\r\n    }\r\n  }\r\n}\r\n<\/code><\/pre>\n<p>By mapping myProp to a computed property called myPropWatcher, we can monitor changes to myProp and have the watcher automatically trigger when myProp changes.<\/p>\n<p>Additionally, if you want to watch multiple props in a child component, you can use an object to watch them.<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-attr\">watch<\/span>: {\r\n  <span class=\"hljs-string\">'myProp1'<\/span>: <span class=\"hljs-keyword\">function<\/span>(<span class=\"hljs-params\">newVal, oldVal<\/span>) {\r\n    <span class=\"hljs-comment\">\/\/ \u5904\u7406myProp1\u7684\u53d8\u5316<\/span>\r\n  },\r\n  <span class=\"hljs-string\">'myProp2'<\/span>: <span class=\"hljs-keyword\">function<\/span>(<span class=\"hljs-params\">newVal, oldVal<\/span>) {\r\n    <span class=\"hljs-comment\">\/\/ \u5904\u7406myProp2\u7684\u53d8\u5316<\/span>\r\n  }\r\n}\r\n<\/code><\/pre>\n<p>This can achieve monitoring of multiple props. Hope this helps you.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In Vue, props are data passed from a parent component to a child component, and the child component cannot directly watch props. However, you can monitor props by using computed properties in the child component. For example, in the scenario where a parent component passes a prop called myProp to a child component, we can [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[13017,12429,13020,13021,1813],"class_list":["post-10435","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-computed-properties","tag-vue-components","tag-vue-props","tag-vue-watch","tag-vue-js"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Watch Vue Props with Computed Properties - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn how to monitor Vue props using computed properties. Solve prop-watching issues in child components effectively.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/blog\/how-to-solve-the-issue-of-not-being-able-to-watch-props-in-vue\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Watch Vue Props with Computed Properties\" \/>\n<meta property=\"og:description\" content=\"Learn how to monitor Vue props using computed properties. 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