{"id":7312,"date":"2021-08-03T10:37:26","date_gmt":"2021-08-03T10:37:26","guid":{"rendered":"https:\/\/www.scmgalaxy.com\/tutorials\/?p=7312"},"modified":"2022-04-13T16:30:47","modified_gmt":"2022-04-13T16:30:47","slug":"how-to-check-properties-on-objects-in-javascript","status":"publish","type":"post","link":"https:\/\/www.scmgalaxy.com\/tutorials\/how-to-check-properties-on-objects-in-javascript\/","title":{"rendered":"How to check properties on objects in JavaScript?"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Check Properties exist<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.scmgalaxy.com\/tutorials\/wp-content\/uploads\/2021\/08\/check-properties-exist.png\" alt=\"\" class=\"wp-image-7313\" width=\"841\" height=\"466\" srcset=\"https:\/\/www.scmgalaxy.com\/tutorials\/wp-content\/uploads\/2021\/08\/check-properties-exist.png 650w, https:\/\/www.scmgalaxy.com\/tutorials\/wp-content\/uploads\/2021\/08\/check-properties-exist-300x166.png 300w\" sizes=\"auto, (max-width: 841px) 100vw, 841px\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>Check Properties exist<\/strong><\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Syntax:- if (typeof object_name.key !== \u201eundefined\u201f)<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ex:-<\/h2>\n\n\n\n<script src=\"https:\/\/gist.github.com\/vijaypk376\/472b65f02721dd3e83d436ba7443f6bf.js\"><\/script>\n\n\n\n<h2 class=\"wp-block-heading\">Check Properties exist<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>in operator<\/strong><\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Syntax: &#8211; if (\u201ekey\u201f in object_name)<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ex:-<\/strong><\/p>\n\n\n\n<script src=\"https:\/\/gist.github.com\/vijaypk376\/f17b1bceadfcfdddf105168a4c5ffdc5.js\"><\/script>\n\n\n\n<h2 class=\"wp-block-heading\">Check Properties exist<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>hasOwnProperty ()<\/strong><\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Syntax: &#8211; if (object_name.hasOwnProperty(\u201ckey\u201d))<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ex:-<\/strong><\/p>\n\n\n\n<script src=\"https:\/\/gist.github.com\/vijaypk376\/26fc3fcfa7f0875150192c63a2c26ed3.js\"><\/script>\n","protected":false},"excerpt":{"rendered":"<p>Check Properties exist Check Properties exist Syntax:- if (typeof object_name.key !== \u201eundefined\u201f) Ex:- Check Properties exist in operator Syntax: &#8211; [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_joinchat":[],"footnotes":""},"categories":[16],"tags":[5858,5860,5859,5095,5137],"class_list":["post-7312","post","type-post","status-publish","format-standard","hentry","category-javascript","tag-check-properties","tag-hasownproperty","tag-in-operator","tag-javascript","tag-objects"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to check properties on objects in JavaScript? 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