js生成隨機字串
阿新 • • 發佈：2019-02-19
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>js生成隨機數</title> <script type="text/javascript" src="js/jquery-3.1.1.min.js"></script> </head> <body> <script> function _getRandomString(length) { length = length || 32; //設定隨機數範圍 var $chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'; var maxPos = $chars.length; var result = ''; for(i = 0; i < length; i++) { //產生隨機數方式 result += $chars.charAt(Math.floor(Math.random() * maxPos)); } return result; } for(var j = 0; j < 5; j++) { //隨機數長度為4 var randomNumber = _getRandomString(4); console.log(randomNumber); } </script> </body> </html>