javascript 如何验证多个单选按钮
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How to Validate Multiple radio buttons
提问by Talk2Nit
How can I validate multiple radio buttons. All these radio buttons generated dynamically.
如何验证多个单选按钮。所有这些单选按钮都是动态生成的。
<input type="radio" name="answer_option1" value="1" id="ans_options1" />
<input type="radio" name="answer_option1" value="2" id="ans_options2" />
<input type="radio" name="answer_option1" value="3" id="ans_options3" />
<input type="radio" name="answer_option1" value="4" id="ans_options4" />
<input type="radio" name="answer_option2" value="5" id="ans_options5" />
<input type="radio" name="answer_option2" value="6" id="ans_options6" />
<input type="radio" name="answer_option2" value="7" id="ans_options7" />
<input type="radio" name="answer_option2" value="8" id="ans_options8" />
<input type="radio" name="answer_option3" value="9" id="ans_options9" />
<input type="radio" name="answer_option3" value="10" id="ans_options10" />
<input type="radio" name="answer_option3" value="11" id="ans_options11" />
<input type="radio" name="answer_option3" value="12" id="ans_options12" />
<input type="radio" name="answer_option4" value="13" id="ans_options13" />
<input type="radio" name="answer_option4" value="14" id="ans_options14" />
<input type="radio" name="answer_option4" value="15" id="ans_options15" />
<input type="radio" name="answer_option4" value="16" id="ans_options16" />
回答by Aamir Afridi
Try this http://jsfiddle.net/aamir/r9qR2/
试试这个http://jsfiddle.net/aamir/r9qR2/
Since each group has different name attribute so you have to do validation for each set of radio buttons.
由于每个组具有不同的名称属性，因此您必须对每组单选按钮进行验证。
if($('input[name="answer_option1"]:checked').length === 0) {
alert('Please select one option');
}
If you have unlimited number of groups. Try this http://jsfiddle.net/aamir/r9qR2/2/
如果您有无限数量的组。试试这个http://jsfiddle.net/aamir/r9qR2/2/
//Make groups
var names = []
$('input:radio').each(function () {
var rname = $(this).attr('name');
if ($.inArray(rname, names) === -1) names.push(rname);
});
//do validation for each group
$.each(names, function (i, name) {
if ($('input[name="' + name + '"]:checked').length === 0) {
console.log('Please check ' + name);
}
});
If you want to show just 1 error for all groups. Try this http://jsfiddle.net/aamir/r9qR2/224/
如果您只想为所有组显示 1 个错误。试试这个http://jsfiddle.net/aamir/r9qR2/224/
回答by patel.milanb
try this new fiddle http://jsfiddle.net/Hgpa9/3/
试试这个新小提琴http://jsfiddle.net/Hgpa9/3/
$(document).on("click","#validate", function() {
var names = [];
$('input[type="radio"]').each(function() {
// Creates an array with the names of all the different checkbox group.
names[$(this).attr('name')] = true;
});
// Goes through all the names and make sure there's at least one checked.
for (name in names) {
var radio_buttons = $("input[name='" + name + "']");
if (radio_buttons.filter(':checked').length == 0) {
alert('none checked in ' + name);
}
else {
// If you need to use the result you can do so without
// another (costly) jQuery selector call:
var val = radio_buttons.val();
}
}
});
回答by Balachandran
var names = []
$('input[name^="answer_option"]').each(function() {
var rname = $(this).attr('name');
if ($.inArray(rname, names) == -1) names.push(rname);
});
$.each(names, function (i, name) {
if ($('input[name="' + name + '"]:checked').length == 0) {
console.log('Please check ' + name);
}
});
