{"id":144924,"date":"2025-04-25T15:28:17","date_gmt":"2025-04-25T09:58:17","guid":{"rendered":"https:\/\/data-flair.training\/blogs\/?p=144924"},"modified":"2025-04-25T15:28:17","modified_gmt":"2025-04-25T09:58:17","slug":"password-strength-checker-using-javascript","status":"publish","type":"post","link":"https:\/\/data-flair.training\/blogs\/password-strength-checker-using-javascript\/","title":{"rendered":"JavaScript Project &#8211; Password Strength Checker"},"content":{"rendered":"<h3>Program 1<\/h3>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\">&lt;!-- Project: Password Strength Checker --&gt;\r\n&lt;!-- \r\n1. The password must be at least 8 characters long.\r\n2. The password must contain at least one uppercase letter.\r\n3. The password must contain at least one lowercase letter.\r\n4. The password must contain at least one digit.\r\n5.The password must contain at least one special character (e.g., !, @, #, $, etc.). --&gt;\r\n\r\n&lt;html&gt;\r\n    &lt;head&gt;&lt;title&gt;Password Strength Checker&lt;\/title&gt;\r\n        &lt;script type=\"text\/javascript\"&gt;\r\n            function check_password()\r\n            {\r\n                let password=document.getElementById(\"txtpassword\").value\r\n               \/\/ Regular Expressions to check the criteria\r\n                const minLength = \/.{8,}\/; \/\/ Minimum length 8 characters\r\n                const hasUpperCase = \/[A-Z]\/; \/\/ At least one uppercase letter\r\n                const hasLowerCase = \/[a-z]\/; \/\/ At least one lowercase letter\r\n                const hasDigits = \/\\d\/; \/\/ At least one number\r\n                const hasSpecialChar = \/[!@#$%^&amp;*(),.?\":{}|&lt;&gt;]\/; \/\/ At least one special character\r\n                if(!minLength.test(password))\r\n                       alert(\"Password must have minimum length 8 characters....!\")\r\n                else if(!hasUpperCase.test(password))\r\n                        alert(\"Password must have at least one uppercase letter....!\")\r\n                else if(!hasLowerCase.test(password))    \r\n                       alert(\"Password must have at least one lowercase letter....!\")\r\n                else if(!hasDigits.test(password))    \r\n                       alert(\"Password must have at least one number(digit)....!\")\r\n                else if(!hasSpecialChar.test(password))    \r\n                    alert(\"Password must have at least one special character....!\")\r\n                else\r\n                  document.writeln(\"&lt;br&gt;&lt;br&gt;&lt;br&gt;&lt;center&gt;&lt;font color=#c04409 size=6&gt;Great your Password  is Strong password.....!: \"+password+\" &lt;\/font&gt;&lt;\/center&gt;\")    \r\n            }\r\n          &lt;\/script&gt;\r\n    &lt;\/head&gt;\r\n    &lt;body&gt;  \r\n     &lt;center&gt; \r\n        &lt;br&gt;&lt;br&gt;&lt;br&gt;\r\n        &lt;font color=\"#c04409\" size=\"6\"&gt;Password Strength Checker&lt;\/font&gt;\r\n        &lt;form&gt;\r\n        &lt;table border=\"1\"&gt;\r\n            &lt;tr&gt;\r\n                &lt;th&gt;&lt;font color=\"#f49b0d\" size=\"5\"&gt;Enter Your Password:&lt;\/font&gt;&lt;\/th&gt;\r\n                &lt;td&gt;\r\n                    &lt;input type=\"password\" id=\"txtpassword\"&gt;\r\n                    &lt;input type=\"button\" value=\"Check Password\" onclick=\"check_password()\"&gt;\r\n                &lt;\/td&gt;\r\n\r\n            &lt;\/tr&gt;\r\n          &lt;\/table&gt;  \r\n          &lt;\/form&gt;\r\n     &lt;\/center&gt;  \r\n     &lt;\/body&gt;<\/pre>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Program 1 &lt;!&#8211; Project: Password Strength Checker &#8211;&gt; &lt;!&#8211; 1. The password must be at least 8 characters long. 2. The password must contain at least one uppercase letter. 3. The password must contain&#46;&#46;&#46;<\/p>\n","protected":false},"author":581,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18979],"tags":[7758,34082,34080,31621,31622,18980,27871,27872,34081],"class_list":["post-144924","post","type-post","status-publish","format-standard","hentry","category-javascript","tag-javascript","tag-javascript-password-strength-checker","tag-javascript-password-strength-checker-project","tag-javascript-practical","tag-javascript-program","tag-javascript-tutorial","tag-password-strength-checker","tag-password-strength-checker-project","tag-password-strength-checker-using-javascript"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>JavaScript Project - Password Strength Checker - DataFlair<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/data-flair.training\/blogs\/password-strength-checker-using-javascript\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"JavaScript Project - Password Strength Checker - DataFlair\" \/>\n<meta property=\"og:description\" content=\"Program 1 &lt;!-- Project: Password Strength Checker --&gt; &lt;!-- 1. 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