[英]Javascript / Jquery Validation on required fields
I searched a lot but couldn't find an answer for my question. 我进行了很多搜索,但找不到我的问题的答案。 Firstly, i would like to have a submit button which will be disable if all the required fields are not filled. 首先,我想有一个提交按钮,如果没有填写所有必填字段,该按钮将被禁用。 I found some example if all the fields are filled but i have required and not required ones So, I need to find if the required ones are filled or not. 我找到了一些示例,说明所有字段是否都已填写,但是我已经填写了必填字段,而不是必填字段。 I am currently out of ideas of how to make it happen. 我目前对如何实现它没有任何想法。 Just in case , i am using play framework 2.1.x with Scala. 以防万一,我在Scala中使用play框架2.1.x。
Cheers, Ilgün 伊尔干,干杯
Here is a simple example: 这是一个简单的示例:
First you can identify the required fields with a class of required: 首先,您可以使用必填类来标识必填字段:
<form id="myForm">
*<input type="text" class="required" /></br>
*<input type="text" class="required" /></br>
<input type="text" /></br>
<input type="text" /></br>
<input type="submit"/>
</form>
Initially disable your submit button: 最初禁用您的提交按钮:
var submitButton = $("#myForm input[type='submit']").attr("disabled", true);
Then use jQuery to loop through your inputs everytime one changes, and check if there are values in them. 然后,使用jQuery每次更改输入时都会遍历您的输入,并检查其中是否有值。 If they all have a value then enable the submit button, if not disable it: 如果它们都有一个值,则启用提交按钮,如果不禁用它,则:
$("#myForm input.required").change(function () {
var valid = true;
$.each($("#myForm input.required"), function (index, value) {
if(!$(value).val()){
valid = false;
}
});
if(valid){
$(submitButton).attr("disabled", false);
}
else{
$(submitButton).attr("disabled", true);
}
});
Please see this jsFiddle with a simple example of what you are describing using jQuery. 请参阅此jsFiddle以及您使用jQuery描述的简单示例。
This is just some basic stuff with plain HTML/JS to show a possible way of input validation: 这只是纯HTML / JS的一些基本内容,用于显示输入验证的可能方法:
HTML: HTML:
<html>
<form id="form">
<input class="form-input" data-required="true" type="text" />
<input class="form-input" data-required="true" type="text" />
<input class="form-input" data-required="false" type="text" />
<input class="form-input" data-required="false" type="text" />
<input id="form-submit" type="submit" disabled />
</form>
</html>
JS: JS:
$(document).ready(function() {
// on input change:
$(".form-input").on('change', function() {
// hide the input (not neccessary)
$("#form-submit").hide();
// enable it
$("#form-submit").removeProp("disabled");
// check all inputs
$.each(".form-input", function() {
// read element values
var required = $(this).data("required");
var empty = ($(this).val() == "" || $(this).val() == null)
// if element is required but empty:
if (required && empty) {
// disable submit button
$("#form-submit").prop("disabled", "disabled");
}
}
// now the submit button is enabled if all required inputs are filled
// and it is disabled if at least one required input is empty
// after hiding it: make the button visible again (not neccessary)
$("#form-submit").show();
}
});
I have been trying to use your solution, 我一直在尝试使用您的解决方案,
this is my input : 这是我的输入:
<input class="required" placeholder="Required Field" required="true" name="tracktitle" type="text">
However the button is not turning to enabled state. 但是,按钮没有变成启用状态。
JS: JS:
<script>
$(function () {
var submitButton = $("#myForm input[type='submit']").attr("disabled", true);
$("#myForm input.required").change(function () {
var valid = true;
$.each($("#myForm input.required"), function (index, value) {
alert("comes here");
if(!$(value).val()){
valid = false;
}
});
if(valid){
$(submitButton).attr("disabled", false);
console.log("valid");
alert("valid");
}
else{
$(submitButton).attr("disabled", true);
}
});
});
</script>
My submit Button: 我的提交按钮:
<input type="submit" class="btn btn-primary" value="Submit" id="form-submit" onclick="return myConfirm();" />
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.