我是網絡開發領域的新手，我從基本的應用程序開始。我正在制作一個簡單的網頁來添加兩個數字，并嘗試執行一些基本驗證，輸入字段不能為空，并且輸入只能是浮點數。我的index.html：<!doctype html><html><head> <!-- Required meta tags --> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"> <!-- Bootstrap CSS --> <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous"> <link rel="stylesheet" type="text/css" href="styles.css"> <link href="https://fonts.googleapis.com/css2?family=Merriweather&display=swap" rel="stylesheet"> <title>Add Two Numbers</title></head><body> <form class="container center_div topSpacing"> <h1 id="Title" class="text-center">Add Two Numbers</h1> <div class="form-group"> <label for="Num1">First Number</label> <input type="text" class="form-control" id="Num1" placeholder="Enter First Number"> </div> <div class="form-group"> <label for="Num2">Second Number</label> <input type="text" class="form-control" id="Num2" placeholder="Enter Second Number"> </div> <div class="text-center"> <button onclick="result()" type="button" class="btn btn-outline-success">Evaluate</button> </div> </form> <br> <h1 id="Title2" class="text-center"></h1> <script src="https://code.jquery.com/jquery-3.4.1.slim.min.js" integrity="sha384-J6qa4849blE2+poT4WnyKhv5vZF5SrPo0iEjwBvKU7imGFAV0wwj1yYfoRSJoZ+n" crossorigin="anonymous"></script> <script type="text/javascript" src="index.js"></script></body></html>我的index.js：let var1 = document.getElementById("Num1");let var2 = document.getElementById("Num2");function validate() { if(var1 == "" || var2 == "") return false; return true;}JavaScript 代碼不執行驗證以及求和。
JavaScript 中 float 和非空的驗證
慕尼黑5688855
2023-12-11 15:25:59
