[英]Disable/Enable Submit Button until all forms have been filled
我希望我的表单提交按钮被禁用/启用,具体取决于表单是否完全填写。
当输入被填满时,禁用按钮变为启用。 这很好用。 但我希望它在输入被清除时禁用按钮。
这是我的脚本:
<script type="text/javascript" language="javascript">
function checkform()
{
var f = document.forms["theform"].elements;
var cansubmit = true;
for (var i = 0; i < f.length; i++) {
if (f[i].value.length == 0) cansubmit = false;
}
if (cansubmit) {
document.getElementById('submitbutton').disabled = false;
}
}
</script>
<form name="theform">
<input type="text" onKeyup="checkform()" />
<input type="text" onKeyup="checkform()" />
<input id="submitbutton" type="submit" disabled="disabled" value="Submit" />
</form>
只需使用
document.getElementById('submitbutton').disabled = !cansubmit;
而不是只有一种方式的 if 子句。
另外,对于禁用 JS 的用户,我建议仅设置 JS 的初始disabled
。 为此,只需将脚本移到<form>
后面并调用checkform();
一次。
只需添加一个else
:
function checkform()
{
var f = document.forms["theform"].elements;
var cansubmit = true;
for (var i = 0; i < f.length; i++) {
if (f[i].value.length == 0) cansubmit = false;
}
if (cansubmit) {
document.getElementById('submitbutton').disabled = false;
}
else {
document.getElementById('submitbutton').disabled = 'disabled';
}
}
把它放在一张桌子里,然后在她身上做:
var tabPom = document.getElementById("tabPomId");
$(tabPom ).prop('disabled', true/false);
我刚刚在禁用提交按钮上发布了这个, 直到输入字段填写。 为我工作。
使用提交时的表单。 漂亮干净。 您不必担心触发更改和按键事件。 不必担心按键和焦点问题。
http://www.w3schools.com/jsref/event_form_onsubmit.asp
<form action="formpost.php" method="POST" onsubmit="return validateCreditCardForm()">
...
</form>
function validateCreditCardForm(){
var result = false;
if (($('#billing-cc-exp').val().length > 0) &&
($('#billing-cvv').val().length > 0) &&
($('#billing-cc-number').val().length > 0)) {
result = true;
}
return result;
}
这是代码
<html>
<body>
<input type="text" name="name" id="name" required="required" aria-required="true" pattern="[a-z]{1,5}" onchange="func()">
<script>
function func()
{
var namdata=document.form1.name.value;
if(namdata.match("[a-z]{1,5}"))
{
document.getElementById("but1").disabled=false;
}
}
</script>
</body>
</html>
使用 JavaScript
您可以根据下面的验证代码启用和禁用提交按钮。 这里的工作示例
<script>
function validate() {
var valid = true;
valid = checkEmpty($("#name"));
valid = valid && checkEmail($("#email"));
$("#san-button").attr("disabled",true);
if(valid) {
$("#san-button").attr("disabled",false);
}
}
function checkEmpty(obj) {
var name = $(obj).attr("name");
$("."+name+"-validation").html("");
$(obj).css("border","");
if($(obj).val() == "") {
$(obj).css("border","#FF0000 1px solid");
$("."+name+"-validation").html("Required");
return false;
}
return true;
}
function checkEmail(obj) {
var result = true;
var name = $(obj).attr("name");
$("."+name+"-validation").html("");
$(obj).css("border","");
result = checkEmpty(obj);
if(!result) {
$(obj).css("border","#FF0000 1px solid");
$("."+name+"-validation").html("Required");
return false;
}
var email_regex = /^([a-zA-Z0-9_.+-])+\@(([a-zA-Z0-9-])+\.)+([a-zA-Z0-9]{2,3})+$/;
result = email_regex.test($(obj).val());
if(!result) {
$(obj).css("border","#FF0000 1px solid");
$("."+name+"-validation").html("Invalid");
return false;
}
return result;
}
</script>
我认为这对于 JavaScript 初学者来说会简单得多
//The function checks if the password and confirm password match
// Then disables the submit button for mismatch but enables if they match
function checkPass()
{
//Store the password field objects into variables ...
var pass1 = document.getElementById("register-password");
var pass2 = document.getElementById("confirm-password");
//Store the Confimation Message Object ...
var message = document.getElementById('confirmMessage');
//Set the colors we will be using ...
var goodColor = "#66cc66";
var badColor = "#ff6666";
//Compare the values in the password field
//and the confirmation field
if(pass1.value == pass2.value){
//The passwords match.
//Set the color to the good color and inform
//the user that they have entered the correct password
pass2.style.backgroundColor = goodColor;
message.style.color = goodColor;
message.innerHTML = "Passwords Match!"
//Enables the submit button when there's no mismatch
var tabPom = document.getElementById("btnSignUp");
$(tabPom ).prop('disabled', false);
}else{
//The passwords do not match.
//Set the color to the bad color and
//notify the user.
pass2.style.backgroundColor = badColor;
message.style.color = badColor;
message.innerHTML = "Passwords Do Not Match!"
//Disables the submit button when there's mismatch
var tabPom = document.getElementById("btnSignUp");
$(tabPom ).prop('disabled', true);
}
}
<form name="theform">
<input type="text" />
<input type="text" />`enter code here`
<input id="submitbutton" type="submit"disabled="disabled" value="Submit"/>
</form>
<script type="text/javascript" language="javascript">
let txt = document.querySelectorAll('[type="text"]');
for (let i = 0; i < txt.length; i++) {
txt[i].oninput = () => {
if (!(txt[0].value == '') && !(txt[1].value == '')) {
submitbutton.removeAttribute('disabled')
}
}
}
</script>
这是我验证带有禁用按钮的表单的方法。 看看下面的片段:
var inp = document.getElementsByTagName("input"); var btn = document.getElementById("btn"); // Disable the button dynamically using javascript btn.disabled = "disabled"; function checkForm() { for (var i = 0; i < inp.length; i++) { if (inp[i].checkValidity() == false) { btn.disabled = "disabled"; } else { btn.disabled = false; } } }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"/> <meta name="viewport" content="width=device-width, initial-scale=1.0"/> <title>JavaScript</title> </head> <body> <h1>Javascript form validation</h1> <p>Javascript constraint form validation example:</p> <form onkeyup="checkForm()" autocomplete="off" novalidate> <input type="text" name="fname" placeholder="First Name" required><br><br> <input type="text" name="lname" placeholder="Last Name" required><br><br> <button type="submit" id="btn">Submit</button> </form> </body> </html>
示例说明:
var inp = document.getElementsByTagName("input");
var btn = document.getElementById("btn");
for (var i = 0; i < inp.length; i++) { // Code }
checkValidity()
方法来检查输入元素(具有required
属性)是否有效(代码插入到 for 循环中)。 如果无效,则按钮将保持禁用状态,否则该属性将被删除。 for (var i = 0; i < inp.length; i++) { if (inp[i].checkValidity() == false) { btn.disabled = "disabled"; } else { btn.disabled = false; } }
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