{"id":229672,"date":"2024-03-30T23:52:39","date_gmt":"2024-03-30T23:52:39","guid":{"rendered":"https:\/\/namso-gen.co\/blog\/?p=229672"},"modified":"2024-03-30T23:52:39","modified_gmt":"2024-03-30T23:52:39","slug":"how-to-set-cookie-value-in-javascript","status":"publish","type":"post","link":"https:\/\/namso-gen.co\/blog\/how-to-set-cookie-value-in-javascript\/","title":{"rendered":"How to set cookie value in JavaScript?"},"content":{"rendered":"<p>Setting a cookie value in JavaScript is a fundamental skill for web developers, as cookies play a vital role in web applications. Cookies are small pieces of data stored on a user&#8217;s computer to track information about them. In this article, we will explore the methods to set cookie values using JavaScript and address some related frequently asked questions.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_62 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/namso-gen.co\/blog\/how-to-set-cookie-value-in-javascript\/#How_to_set_cookie_value_in_JavaScript\" title=\"How to set cookie value in JavaScript?\">How to set cookie value in JavaScript?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/namso-gen.co\/blog\/how-to-set-cookie-value-in-javascript\/#What_if_I_want_to_set_multiple_cookies\" title=\"What if I want to set multiple cookies?\">What if I want to set multiple cookies?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/namso-gen.co\/blog\/how-to-set-cookie-value-in-javascript\/#Can_I_specify_the_expiration_date_of_a_cookie\" title=\"Can I specify the expiration date of a cookie?\">Can I specify the expiration date of a cookie?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/namso-gen.co\/blog\/how-to-set-cookie-value-in-javascript\/#Can_I_set_the_path_for_a_cookie\" title=\"Can I set the path for a cookie?\">Can I set the path for a cookie?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/namso-gen.co\/blog\/how-to-set-cookie-value-in-javascript\/#How_can_I_set_a_cookie_to_be_secure_and_only_sent_over_HTTPS\" title=\"How can I set a cookie to be secure and only sent over HTTPS?\">How can I set a cookie to be secure and only sent over HTTPS?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/namso-gen.co\/blog\/how-to-set-cookie-value-in-javascript\/#Is_there_a_limit_to_the_size_of_a_cookie_value\" title=\"Is there a limit to the size of a cookie value?\">Is there a limit to the size of a cookie value?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/namso-gen.co\/blog\/how-to-set-cookie-value-in-javascript\/#Can_I_set_a_cookie_value_with_expiration_using_days_months_or_years\" title=\"Can I set a cookie value with expiration using days, months, or years?\">Can I set a cookie value with expiration using days, months, or years?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/namso-gen.co\/blog\/how-to-set-cookie-value-in-javascript\/#Do_I_need_to_escape_special_characters_in_a_cookie_value\" title=\"Do I need to escape special characters in a cookie value?\">Do I need to escape special characters in a cookie value?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/namso-gen.co\/blog\/how-to-set-cookie-value-in-javascript\/#How_can_I_delete_a_cookie\" title=\"How can I delete a cookie?\">How can I delete a cookie?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/namso-gen.co\/blog\/how-to-set-cookie-value-in-javascript\/#Can_I_set_a_cookies_domain\" title=\"Can I set a cookie&#8217;s domain?\">Can I set a cookie&#8217;s domain?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/namso-gen.co\/blog\/how-to-set-cookie-value-in-javascript\/#How_can_I_check_if_cookies_are_enabled_in_the_browser\" title=\"How can I check if cookies are enabled in the browser?\">How can I check if cookies are enabled in the browser?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/namso-gen.co\/blog\/how-to-set-cookie-value-in-javascript\/#Is_there_a_limit_to_the_number_of_cookies_a_browser_can_store\" title=\"Is there a limit to the number of cookies a browser can store?\">Is there a limit to the number of cookies a browser can store?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/namso-gen.co\/blog\/how-to-set-cookie-value-in-javascript\/#How_long_do_cookies_persist_by_default\" title=\"How long do cookies persist by default?\">How long do cookies persist by default?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"How_to_set_cookie_value_in_JavaScript\"><\/span>How to set cookie value in JavaScript?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>To set a cookie value in JavaScript, you need to use the `document.cookie` property and assign a string value to it. The string value should follow the `key=value` format. Let&#8217;s see an example:<\/p>\n<p>&#8220;`javascript<br \/>\ndocument.cookie = &#8220;cookieName=cookieValue&#8221;;<br \/>\n&#8220;`<\/p>\n<p>In the above example, we set the cookie name as &#8220;cookieName&#8221; and its value as &#8220;cookieValue&#8221;. This will store the cookie on the user&#8217;s computer.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_if_I_want_to_set_multiple_cookies\"><\/span>What if I want to set multiple cookies?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>To set multiple cookies, you can simply provide several `key=value` pairs separated by semicolons:<\/p>\n<p>&#8220;`javascript<br \/>\ndocument.cookie = &#8220;cookieName1=cookieValue1; cookieName2=cookieValue2; cookieName3=cookieValue3&#8221;;<br \/>\n&#8220;`<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_I_specify_the_expiration_date_of_a_cookie\"><\/span>Can I specify the expiration date of a cookie?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Yes, you have the option to specify an expiration date for your cookie. You can add the `expires` parameter along with the date in the `key=value` format. Here&#8217;s an example:<\/p>\n<p>&#8220;`javascript<br \/>\n\/\/ Set the cookie to expire after 7 days<br \/>\nvar expiresDate = new Date();<br \/>\nexpiresDate.setDate(expiresDate.getDate() + 7);<br \/>\ndocument.cookie = &#8220;cookieName=cookieValue; expires=&#8221; + expiresDate.toUTCString();<br \/>\n&#8220;`<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_I_set_the_path_for_a_cookie\"><\/span>Can I set the path for a cookie?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Certainly! You can define the path where the cookie is accessible by adding the `path` parameter. By default, cookies are accessible on the current path. Here&#8217;s an example:<\/p>\n<p>&#8220;`javascript<br \/>\ndocument.cookie = &#8220;cookieName=cookieValue; path=\/myapp&#8221;;<br \/>\n&#8220;`<\/p>\n<p>The above cookie will only be accessible on the &#8220;\/myapp&#8221; path of the website.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_can_I_set_a_cookie_to_be_secure_and_only_sent_over_HTTPS\"><\/span>How can I set a cookie to be secure and only sent over HTTPS?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>To ensure a cookie is only sent over HTTPS, you can include the `secure` flag when setting the cookie:<\/p>\n<p>&#8220;`javascript<br \/>\ndocument.cookie = &#8220;cookieName=cookieValue; secure&#8221;;<br \/>\n&#8220;`<\/p>\n<p>The `secure` flag ensures that the cookie is only sent over an encrypted (HTTPS) connection.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Is_there_a_limit_to_the_size_of_a_cookie_value\"><\/span>Is there a limit to the size of a cookie value?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Yes, there is a limit to the size of a cookie value, which varies between browsers. Generally, most browsers support a maximum of 4096 bytes per cookie. Exceeding this limit may result in the cookie being truncated or not set at all.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_I_set_a_cookie_value_with_expiration_using_days_months_or_years\"><\/span>Can I set a cookie value with expiration using days, months, or years?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>No, the `expires` parameter only accepts a JavaScript Date object. To set an expiration using days, months, or years, you need to manually calculate the appropriate date using JavaScript&#8217;s `Date` object. For example, to set a cookie to expire after 30 days:<\/p>\n<p>&#8220;`javascript<br \/>\nvar expiresDate = new Date();<br \/>\nexpiresDate.setDate(expiresDate.getDate() + 30);<br \/>\ndocument.cookie = &#8220;cookieName=cookieValue; expires=&#8221; + expiresDate.toUTCString();<br \/>\n&#8220;`<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Do_I_need_to_escape_special_characters_in_a_cookie_value\"><\/span>Do I need to escape special characters in a cookie value?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Yes, you should escape special characters in a cookie value, particularly if the value contains characters like semicolons, commas, or whitespace. It is recommended to use the `encodeURIComponent` function to escape the value before setting the cookie.<\/p>\n<p>&#8220;`javascript<br \/>\nvar cookieValue = &#8220;Special;Value&#8221;;<br \/>\ndocument.cookie = &#8220;cookieName=&#8221; + encodeURIComponent(cookieValue);<br \/>\n&#8220;`<\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_can_I_delete_a_cookie\"><\/span>How can I delete a cookie?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>To delete a cookie, you can set its expiration date to a past date:<\/p>\n<p>&#8220;`javascript<br \/>\ndocument.cookie = &#8220;cookieName=; expires=Thu, 01 Jan 1970 00:00:00 UTC&#8221;;<br \/>\n&#8220;`<\/p>\n<p>This instructs the browser to remove the cookie as it has expired.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_I_set_a_cookies_domain\"><\/span>Can I set a cookie&#8217;s domain?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Yes, you can set the domain for a cookie. By default, cookies are accessible on the domain that set them. However, if you want the cookie to be accessible across subdomains, you can specify the domain using the `domain` parameter:<\/p>\n<p>&#8220;`javascript<br \/>\ndocument.cookie = &#8220;cookieName=cookieValue; domain=.example.com&#8221;;<br \/>\n&#8220;`<\/p>\n<p>The above cookie will be accessible on all subdomains of &#8220;example.com&#8221;.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_can_I_check_if_cookies_are_enabled_in_the_browser\"><\/span>How can I check if cookies are enabled in the browser?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>You can check if cookies are enabled by attempting to set a test cookie and then reading its value. If you can successfully set and retrieve the test cookie, it indicates that cookies are enabled in the browser.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Is_there_a_limit_to_the_number_of_cookies_a_browser_can_store\"><\/span>Is there a limit to the number of cookies a browser can store?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Yes, browsers have a limit on the number of cookies that can be stored. The maximum number of cookies varies between browsers but is typically around 20 cookies per domain.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_long_do_cookies_persist_by_default\"><\/span>How long do cookies persist by default?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>By default, cookies remain persistent until they expire or are manually deleted by the user. If you don&#8217;t specify an expiration date, the cookie is considered a session cookie and will be deleted when the user closes their browser.<\/p>\n<p>In conclusion, setting a cookie value in JavaScript is a straightforward process using the `document.cookie` property. By understanding the various parameters such as expiration, path, and security flags, you can customize the behavior of your cookies to suit the needs of your web application. Remember to handle cookie values properly, escape special characters, and keep in mind any limitations imposed by browsers.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Setting a cookie value in JavaScript is a fundamental skill for web developers, as cookies play a vital role in web applications. Cookies are small pieces of data stored on a user&#8217;s computer to track information about them. In this article, we will explore the methods to set cookie values using JavaScript and address some &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"How to set cookie value in JavaScript?\" class=\"read-more button\" href=\"https:\/\/namso-gen.co\/blog\/how-to-set-cookie-value-in-javascript\/#more-229672\">Read more<span class=\"screen-reader-text\">How to set cookie value in JavaScript?<\/span><\/a><\/p>\n","protected":false},"author":57,"featured_media":107420,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86279],"tags":[],"class_list":["post-229672","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-learn","no-featured-image-padding"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to set cookie value in JavaScript?<\/title>\n<meta name=\"description\" content=\"Setting a cookie value in JavaScript is a fundamental skill for web developers, as cookies play a vital role in web applications. Cookies are small pieces\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/namso-gen.co\/blog\/how-to-set-cookie-value-in-javascript\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to set cookie value in JavaScript?\" \/>\n<meta property=\"og:description\" content=\"Setting a cookie value in JavaScript is a fundamental skill for web developers, as cookies play a vital role in web applications. Cookies are small pieces\" \/>\n<meta property=\"og:url\" content=\"https:\/\/namso-gen.co\/blog\/how-to-set-cookie-value-in-javascript\/\" \/>\n<meta property=\"og:site_name\" content=\"Namso Gen Blog - Free Credit Card Generator [100% Valid]\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/synchronyfinancial\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-30T23:52:39+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/namso-gen.co\/blog\/wp-content\/uploads\/2024\/03\/faq.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"630\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Casey Mayer\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@synchrony\" \/>\n<meta name=\"twitter:site\" content=\"@synchrony\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Casey Mayer\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/namso-gen.co\/blog\/how-to-set-cookie-value-in-javascript\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/namso-gen.co\/blog\/how-to-set-cookie-value-in-javascript\/\"},\"author\":{\"name\":\"Casey Mayer\",\"@id\":\"https:\/\/namso-gen.co\/blog\/#\/schema\/person\/89e431077ef417dfaa131f435124f18f\"},\"headline\":\"How to set cookie value in JavaScript?\",\"datePublished\":\"2024-03-30T23:52:39+00:00\",\"dateModified\":\"2024-03-30T23:52:39+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/namso-gen.co\/blog\/how-to-set-cookie-value-in-javascript\/\"},\"wordCount\":830,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/namso-gen.co\/blog\/#organization\"},\"articleSection\":[\"Learn\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/namso-gen.co\/blog\/how-to-set-cookie-value-in-javascript\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/namso-gen.co\/blog\/how-to-set-cookie-value-in-javascript\/\",\"url\":\"https:\/\/namso-gen.co\/blog\/how-to-set-cookie-value-in-javascript\/\",\"name\":\"How to set cookie value in JavaScript?\",\"isPartOf\":{\"@id\":\"https:\/\/namso-gen.co\/blog\/#website\"},\"datePublished\":\"2024-03-30T23:52:39+00:00\",\"dateModified\":\"2024-03-30T23:52:39+00:00\",\"description\":\"Setting a cookie value in JavaScript is a fundamental skill for web developers, as cookies play a vital role in web applications. 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