所以这就是事情,我正在学习 JS,我开始做一些简单的练习来熟悉它,所以我尝试做一个简单的表单验证,但我遇到了显示错误的 div 问题,因为它们是被覆盖,我想得到一些建议来改进此代码并在可能的情况下使其更好。谢谢 !
function checkdata() {
//Acess TextBox Content
var name1 = document.getElementById("name1").value;
var name2 = document.getElementById("name2").value;
var email = document.getElementById("email").value;
//Acess Radio Content
var tdi = document.getElementById("tdi");
var tri = document.getElementById("tri");
var tsi = document.getElementById("tsi");
//Acess Checkbox
var ch = document.getElementById("terms").checked;
//Functions
if (name1 == "" || name2 == "" || email == "") {
document.getElementById("errorsdiv").innerHTML = "Those Fields Are Required";
}
if ((tdi.checked == false) || (tri.checked == false) || (tsi.checked == false)) {
document.getElementById("errorsdiv").innerHTML = "You need to check one branch";
}
if (ch.checked == false) {
document.getElementById("errorsdiv").innerHTML = "You need to Agree on our terms";
}
}
<h1>Form Validation</h1>
<form>
<fieldset>
<legend>Informations</legend>
<label for="name1">Enter Your First Name</label>
<input type="text" id="name1"><br>
<label for="name2">Enter Your Last Name</label>
<input type="text" id="name2"><br>
<label for="email">Enter Your email</label>
<input type="text" id="email"><br>
<label>Choose Your Branch : </label>
<label for="tdi">TDI</label>
<input type="radio" name="branch" id="tdi">
<label for="tri">TRI</label>
<input type="radio" name="branch" id="tri">
<label for="tsi">TSI</label>
<input type="radio" name="branch" id="tsi"><br>
<input type="checkbox" name="terms" id="terms">
<label for="terms">Agree On Our Terms</label>
</fieldset><br>
<input type="button" value="Submit" class="button" onclick="checkdata();">
<fieldset class="errorsf">
<legend>Errors</legend>
<div class="errorsdiv" id="errorsdiv">
</div>
</fieldset>
</form>
这应该可以让您解决错误消息被覆盖的问题。我改变了每一次出现
document.getElementById("errorsdiv").innerHTML =
到
document.getElementById("errorsdiv").innerHTML +=
这可以防止errorsdiv
在循环的每次迭代期间被覆盖forEach
。
errorsdiv
每当您的函数被调用时,我也会设置为空状态,以防止在提交尝试后 innerHTML 不断增长。
我还更改了此语句中的逻辑:
if ((tdi.checked == false) || (tri.checked == false) || (tsi.checked == false)) {
到
if ((tdi.checked == false) && (tri.checked == false) && (tsi.checked == false)) {
那些需要是AND
运算符而不是OR
运算符。您拥有它的方式永远不会返回 true,因为在任何时候都只能检查 1 个单选按钮。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Form</title>
<link rel="stylesheet" href="style.css">
<script>
function checkdata() {
document.getElementById("errorsdiv").innerHTML = "";
//Acess TextBox Content
var name1 = document.getElementById("name1").value;
var name2 = document.getElementById("name2").value;
var email = document.getElementById("email").value;
//Acess Radio Content
var tdi = document.getElementById("tdi");
var tri = document.getElementById("tri");
var tsi = document.getElementById("tsi");
//Acess Checkbox
var ch = document.getElementById("terms");
//Functions
if (name1 == "" || name2 == "" || email == "") {
document.getElementById("errorsdiv").innerHTML += "<p>First Name, Last Name, and email are Required</p>";
}
if ((tdi.checked == false) && (tri.checked == false) && (tsi.checked == false)) {
document.getElementById("errorsdiv").innerHTML += "<p>You need to check one branch</p> ";
}
if (!ch.checked) {
document.getElementById("errorsdiv").innerHTML += "<p>You need to Agree to our terms</p>";
}
}
</script>
</head>
<body>
<h1>Form Validation</h1>
<form>
<fieldset>
<legend>Informations</legend>
<label for="name1">Enter Your First Name</label>
<input type="text" id="name1"><br>
<label for="name2">Enter Your Last Name</label>
<input type="text" id="name2"><br>
<label for="email">Enter Your email</label>
<input type="text" id="email"><br>
<label>Choose Your Branch : </label>
<label for="tdi">TDI</label>
<input type="radio" name="branch" id="tdi">
<label for="tri">TRI</label>
<input type="radio" name="branch" id="tri">
<label for="tsi">TSI</label>
<input type="radio" name="branch" id="tsi"><br>
<input type="checkbox" name="terms" id="terms">
<label for="terms">Agree On Our Terms</label>
</fieldset><br>
<input type="button" value="Submit" class="button" onclick="checkdata();">
<fieldset class="errorsf">
<legend>Errors</legend>
<div class="errorsdiv" id="errorsdiv">
</div>
</fieldset>
</form>
</body>
</html>
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