{"id":10570,"date":"2024-03-14T12:21:27","date_gmt":"2024-03-14T12:21:27","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/what-is-the-purpose-and-usage-of-this-set-in-vue\/"},"modified":"2025-08-04T01:14:26","modified_gmt":"2025-08-04T01:14:26","slug":"what-is-the-purpose-and-usage-of-this-set-in-vue","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/what-is-the-purpose-and-usage-of-this-set-in-vue\/","title":{"rendered":"Vue $set: Adding Reactive Properties"},"content":{"rendered":"

In Vue, when you need to add a new property to a reactive object, if you directly use the assignment operator (like this.someProperty = someValue), Vue cannot detect the changes in this property, which would make it unresponsive. To solve this issue, you can use the this.$set method to add a new property and ensure that it is reactive.<\/p>\n

The usage of the this.$set method is as follows:<\/p>\n

this<\/span>.$set(obj, propertyName, value)\r\n<\/code><\/pre>\n
    \n
  1. obj: Object to which properties should be added<\/li>\n
  2. propertyName: The name of the property to be added.<\/li>\n
  3. value: the value of the property to be added<\/li>\n<\/ol>\n
    For example, if you want to add a new property called newProperty to the data object in a Vue component, you can use the this.$set method like this:<\/p>\n
    this<\/span>.$set(this<\/span>.$data<\/span>, 'newProperty'<\/span>, someValue)\r\n<\/code><\/pre>\n
    This ensures that the newProperty attribute is reactive and can be watched and updated by Vue.<\/p>\n","protected":false},"excerpt":{"rendered":"
    In Vue, when you need to add a new property to a reactive object, if you directly use the assignment operator (like this.someProperty = someValue), Vue cannot detect the changes in this property, which would make it unresponsive. To solve this issue, you can use the this.$set method to add a new property and ensure […]<\/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":[362,324,13262,4221,1813],"class_list":["post-10570","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-frontend","tag-javascript","tag-reactivity","tag-set","tag-vue-js"],"yoast_head":"\nVue $set: Adding Reactive Properties - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn how Vue.js $set method adds reactive properties to objects. Fix reactivity issues when adding new properties dynamically.\" \/>\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\/what-is-the-purpose-and-usage-of-this-set-in-vue\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Vue $set: Adding Reactive Properties\" \/>\n<meta property=\"og:description\" content=\"Learn how Vue.js $set method adds reactive properties to objects. Fix reactivity issues when adding new properties dynamically.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/blog\/what-is-the-purpose-and-usage-of-this-set-in-vue\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/SiliCloudGlobal\/\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-14T12:21:27+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-04T01:14:26+00:00\" \/>\n<meta name=\"author\" content=\"William Carter\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:site\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"William Carter\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/what-is-the-purpose-and-usage-of-this-set-in-vue\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/what-is-the-purpose-and-usage-of-this-set-in-vue\/\"},\"author\":{\"name\":\"William Carter\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/f697031891aacefc4b681d139781d3c0\"},\"headline\":\"Vue $set: Adding Reactive Properties\",\"datePublished\":\"2024-03-14T12:21:27+00:00\",\"dateModified\":\"2025-08-04T01:14:26+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/what-is-the-purpose-and-usage-of-this-set-in-vue\/\"},\"wordCount\":146,\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"keywords\":[\"Frontend\",\"JavaScript\",\"reactivity\",\"set\",\"Vue.js\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/what-is-the-purpose-and-usage-of-this-set-in-vue\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/what-is-the-purpose-and-usage-of-this-set-in-vue\/\",\"name\":\"Vue $set: Adding Reactive Properties - Blog - Silicon Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#website\"},\"datePublished\":\"2024-03-14T12:21:27+00:00\",\"dateModified\":\"2025-08-04T01:14:26+00:00\",\"description\":\"Learn how Vue.js $set method adds reactive properties to objects. 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