{"id":3079,"date":"2021-09-07T14:29:15","date_gmt":"2021-09-07T14:29:15","guid":{"rendered":"https:\/\/rengga.dev\/blog\/?p=3079"},"modified":"2023-02-28T00:41:58","modified_gmt":"2023-02-28T00:41:58","slug":"js-tutorial-math-random-strong-password-generator","status":"publish","type":"post","link":"https:\/\/rengga.dev\/blog\/js-tutorial-math-random-strong-password-generator\/","title":{"rendered":"JS Tutorial &#8211; Math.random() Strong Password Generator"},"content":{"rendered":"<p><span style=\"color: #ef3207;\"><a style=\"color: #ef3207;\" href=\"https:\/\/rengga.dev\/\" target=\"_blank\" rel=\"noopener\"><strong>Rengga Dev<\/strong><\/a> <\/span>&#8211; <code>Math.random()<\/code> is an API in JavaScript. It is a function that gives you a random number. The number returned will be between 0 (inclusive, as in, it\u2019s possible for an actual 0 to be returned) and 1 (exclusive, as in, it\u2019s not possible for an actual 1 to be returned).<\/p>\n<p><iframe style=\"width: 100%;\" title=\"The Password Genie - Vue.js\" src=\"https:\/\/codepen.io\/renggagumilar\/embed\/zYWmpZE?default-tab=result&amp;theme-id=dark\" height=\"600\" frameborder=\"no\" scrolling=\"no\" allowfullscreen=\"allowfullscreen\"><br \/>\nSee the Pen <a href=\"https:\/\/codepen.io\/renggagumilar\/pen\/zYWmpZE\"><br \/>\nThe Password Genie &#8211; Vue.js<\/a> by Rengga Gumilar (<a href=\"https:\/\/codepen.io\/renggagumilar\">@renggagumilar<\/a>)<br \/>\non <a href=\"https:\/\/codepen.io\">CodePen<\/a>.<br \/>\n<\/iframe><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"js\">new Vue({\r\n  el: '#app',\r\n  data() {\r\n    return {\r\n      password: '',\r\n      copied: false,\r\n      settings: {\r\n        maxLength: 64,\r\n        maxDigits: 10,\r\n        maxSymbols: 10,\r\n        length: 12,\r\n        digits: 4,\r\n        symbols: 2,\r\n        ambiguous: true,\r\n      }\r\n    };\r\n  },\r\n  computed: {\r\n    lengthThumbPosition: function() {\r\n      return (( (this.settings.length - 6) \/ (this.settings.maxLength - 6)) * 100);\r\n    },\r\n    digitsThumbPosition: function() {\r\n      return (( (this.settings.digits - 0) \/ (this.settings.maxDigits - 0)) * 100);\r\n    },\r\n    symbolsThumbPosition: function() {\r\n      return (( (this.settings.symbols - 0) \/ (this.settings.maxSymbols - 0)) * 100);\r\n    },\r\n    strength: function() {\r\n      var count = {\r\n        excess: 0,\r\n        upperCase: 0,\r\n        numbers: 0,\r\n        symbols: 0\r\n      };\r\n\r\n\r\n      var weight = {\r\n        excess: 3,\r\n        upperCase: 4,\r\n        numbers: 5,\r\n        symbols: 5,\r\n        combo: 0, \r\n        flatLower: 0,\r\n        flatNumber: 0\r\n      };\r\n\r\n      var strength = {\r\n        text: '',\r\n        score: 0\r\n      };\r\n\r\n      \r\n      var baseScore = 30;\r\n\r\n      for (i=0; i &lt; this.password.length;i++){\r\n        if (this.password.charAt(i).match(\/[A-Z]\/g)) {count.upperCase++;}\r\n        if (this.password.charAt(i).match(\/[0-9]\/g)) {count.numbers++;}\r\n        if (this.password.charAt(i).match(\/(.*[!,@,#,$,%,^,&amp;,*,?,_,~])\/)) {count.symbols++;} \r\n      }\r\n      \r\n      count.excess = this.password.length - 6;\r\n      \r\n      if (count.upperCase &amp;&amp; count.numbers &amp;&amp; count.symbols){\r\n        weight.combo = 25; \r\n      }\r\n      else if ((count.upperCase &amp;&amp; count.numbers) || (count.upperCase &amp;&amp; count.symbols) || (count.numbers &amp;&amp; count.symbols)){\r\n        weight.combo = 15; \r\n      }\r\n      \r\n      if (this.password.match(\/^[\\sa-z]+$\/))\r\n      { \r\n        weight.flatLower = -30;\r\n      }\r\n      \r\n      if (this.password.match(\/^[\\s0-9]+$\/))\r\n      { \r\n        weight.flatNumber = -50;\r\n      }\r\n\r\n      var score = \r\n        baseScore + \r\n        (count.excess * weight.excess) + \r\n        (count.upperCase * weight.upperCase) + \r\n        (count.numbers * weight.numbers) + \r\n        (count.symbols * weight.symbols) + \r\n        weight.combo + weight.flatLower + \r\n        weight.flatNumber;\r\n\r\n      if(score &lt; 30 ) {\r\n        strength.text = \"weak\";\r\n        strength.score = 10;\r\n        return strength;\r\n      } else if (score &gt;= 30 &amp;&amp; score &lt; 75 ){\r\n        strength.text = \"average\";\r\n        strength.score = 40;\r\n        return strength;\r\n      } else if (score &gt;= 75 &amp;&amp; score &lt; 150 ){\r\n        strength.text = \"strong\";\r\n        strength.score = 75;\r\n        return strength;\r\n      } else {\r\n        strength.text = \"secure\";\r\n        strength.score = 100;\r\n        return strength;\r\n      }\r\n    },\r\n  },\r\n  mounted() {\r\n    this.generatePassword();\r\n  },\r\n  watch: {\r\n    settings: {\r\n      handler: function() {\r\n        this.generatePassword();\r\n      },\r\n      deep: true\r\n    }\r\n  },\r\n  methods: {\r\n    \/\/ copy password to clipboard\r\n    copyToClipboard(){\r\n      \/\/ we should create a textarea, put the password inside it, select it and finally copy it\r\n      var copyElement = document.createElement(\"textarea\");\r\n      copyElement.style.opacity = '0';\r\n      copyElement.style.position = 'fixed';\r\n      copyElement.textContent = this.password;\r\n      var body = document.getElementsByTagName('body')[0];\r\n      body.appendChild(copyElement);\r\n      copyElement.select();\r\n      document.execCommand('copy');\r\n      body.removeChild(copyElement);\r\n      \r\n      this.copied = true;\r\n      \/\/ reset this.copied\r\n      setTimeout(() =&gt; {\r\n        this.copied = false;\r\n      }, 750);\r\n    },\r\n    \/\/ generate the password\r\n    generatePassword() {\r\n      var lettersSetArray = [\"a\", \"b\", \"c\", \"d\", \"e\", \"f\", \"g\", \"h\", \"i\", \"j\", \"k\", \"l\", \"m\", \"n\", \"o\", \"p\", \"q\", \"r\", \"s\", \"t\", \"u\", \"v\", \"w\", \"x\", \"y\", \"z\"];\r\n      var symbolsSetArray = [ \"=\",\"+\",\"-\",\"^\",\"?\",\"!\",\"%\",\"&amp;\",\"*\",\"$\",\"#\",\"^\",\"@\",\"|\"];\r\n      \/\/var ambiguousSetArray = [\"(\",\")\",\"{\",\"}\",\"[\",\"]\",\"(\",\")\",\"\/\",\"~\",\";\",\":\",\".\",\"&lt;\",\"&gt;\"];\r\n      var passwordArray = [];\r\n      var digitsArray = [];\r\n      var digitsPositionArray = [];\r\n\r\n\r\n      \/\/ first, fill the password array with letters, uppercase and lowecase\r\n      for (var i = 0; i &lt; this.settings.length; i++) {\r\n        \/\/ get an array for all indexes of the password array\r\n        digitsPositionArray.push(i);\r\n\r\n        var upperCase = Math.round(Math.random() * 1);\r\n        if (upperCase === 0) {\r\n          passwordArray[i] = lettersSetArray[Math.floor(Math.random()*lettersSetArray.length)].toUpperCase();\r\n        }\r\n        else {\r\n          passwordArray[i] = lettersSetArray[Math.floor(Math.random()*lettersSetArray.length)];\r\n        }\r\n      }\r\n\r\n      \/\/ Add digits to password\r\n      for (i = 0; i &lt; this.settings.digits; i++) {\r\n        digit = Math.round(Math.random() * 9);\r\n        numberIndex = digitsPositionArray[Math.floor(Math.random()*digitsPositionArray.length)];\r\n\r\n        passwordArray[numberIndex] =  digit;\r\n\r\n        \/* remove position from digitsPositionArray so we make sure to the have the exact number of digits in our password\r\n        since without this step, numbers may override other numbers *\/\r\n\r\n        var j = digitsPositionArray.indexOf(numberIndex);\r\n        if(i != -1) {\r\n          digitsPositionArray.splice(j, 1);\r\n        }\r\n      }\r\n\r\n      \/\/ add special charachters \"symbols\"\r\n      for (i = 0; i &lt; this.settings.symbols; i++) {\r\n        var symbol = symbolsSetArray[Math.floor(Math.random()*symbolsSetArray.length)];\r\n        var symbolIndex = digitsPositionArray[Math.floor(Math.random()*digitsPositionArray.length)];\r\n\r\n        passwordArray[symbolIndex] =  symbol;\r\n\r\n        \/* remove position from digitsPositionArray so we make sure to the have the exact number of digits in our password\r\n        since without this step, numbers may override other numbers *\/\r\n\r\n        var j = digitsPositionArray.indexOf(symbolIndex);\r\n        if(i != -1) {\r\n          digitsPositionArray.splice(j, 1);\r\n        }\r\n      }\r\n      this.password = passwordArray.join(\"\");\r\n    },\r\n  },\r\n});<\/pre>\n<p>This password generator uses Math.random to get a password array filled with uppercase and lowercase letters then adds random digits to the generated password. This is another great practical example!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Rengga Dev &#8211; Math.random() is an API in JavaScript. It is a <a class=\"read-more\" href=\"https:\/\/rengga.dev\/blog\/js-tutorial-math-random-strong-password-generator\/\" title=\"JS Tutorial &#8211; Math.random() Strong Password Generator\" itemprop=\"url\"><\/a><\/p>\n","protected":false},"author":1,"featured_media":3799,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20,12],"tags":[264,263,274,284,103,227],"newstopic":[],"class_list":{"0":"post-3079","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-javascript","8":"category-web-development","9":"tag-javascript-tutorial","10":"tag-js-tutorial","11":"tag-math-random","12":"tag-strong-password-generator","13":"tag-web-design","14":"tag-web-designer"},"_links":{"self":[{"href":"https:\/\/rengga.dev\/blog\/wp-json\/wp\/v2\/posts\/3079","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rengga.dev\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rengga.dev\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rengga.dev\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/rengga.dev\/blog\/wp-json\/wp\/v2\/comments?post=3079"}],"version-history":[{"count":2,"href":"https:\/\/rengga.dev\/blog\/wp-json\/wp\/v2\/posts\/3079\/revisions"}],"predecessor-version":[{"id":3082,"href":"https:\/\/rengga.dev\/blog\/wp-json\/wp\/v2\/posts\/3079\/revisions\/3082"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rengga.dev\/blog\/wp-json\/wp\/v2\/media\/3799"}],"wp:attachment":[{"href":"https:\/\/rengga.dev\/blog\/wp-json\/wp\/v2\/media?parent=3079"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rengga.dev\/blog\/wp-json\/wp\/v2\/categories?post=3079"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rengga.dev\/blog\/wp-json\/wp\/v2\/tags?post=3079"},{"taxonomy":"newstopic","embeddable":true,"href":"https:\/\/rengga.dev\/blog\/wp-json\/wp\/v2\/newstopic?post=3079"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}