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千鋒扣丁學(xué)堂HTML5培訓(xùn)之JS隨機(jī)密碼生成算法

2019-09-23 11:43:39 5561瀏覽

今天千鋒扣丁學(xué)堂HTML5培訓(xùn)老師給大家分享一篇關(guān)于JS隨機(jī)密碼生成算法的詳細(xì)介紹，下面我們一起來看一下吧。

題目：

輸入一個(gè)正整數(shù)n，生成n個(gè)隨機(jī)密碼，其中包括數(shù)字，大小寫字母。

代碼：

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  <style>
  div{
    width: 300px;
    height: 100px;
    background-color: lightblue;
    overflow: auto;
  }
  </style>
</head>
<body>
  <input type="text">
  <button>生成</button>
  <div class="end"></div>
  <script>
  var oTn = document.getElementsByTagName("input")[0];
  var oBtn = document.getElementsByTagName("button")[0];
  var oDiv = document.querySelector(".end");
  var password = ["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","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","0","1","2","3","4","5","6","7","8","9"
  ]; 
  function pass(length){
    var Str = "";
    for(var i = 0 ; i<length;i++){
      Str += password[Math.floor(Math.random()*password.length)];
    }
    return Str;
  }
  oBtn.onclick = function(){
    oDiv.innerHTML = pass(oTn.value);
  }
  </script>
</body>
</html>

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