jQuery 单选按钮“被选中”代码
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时间：2020-08-27 10:33:27 来源:igfitidea点击:
jQuery Radio Button "is selected" code
提问by Eae
I am writing a program to check if a radio button is selected. What I have is a good start but I could use a little help fully implementing this type of radio button code. The div's are not quite toggling just yet.
我正在编写一个程序来检查是否选择了单选按钮。我所拥有的是一个良好的开端，但我可以使用一些帮助来完全实现这种类型的单选按钮代码。div 还没有完全切换。
<?php
?>
<!DOCTYPE html>
<html>
<head>
<title>My Title</title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.5/jquery.min.js"></script>
<script>
$(document).ready(function(){
$('#enteraddress').toggle();
$('#entercoords').toggle();
//$('#enteraddress').click(function () { $('#enteraddress').hide(); });
if ($('#byaddress:checked').val() == 'true') {
$('#enteraddress').toggle();
}
});
</script>
</head>
<body>
<div style='border: solid 1px black; margin-bottom: 10px;' id="legaldisclaimer">
<h1>Legal Disclaimer:</h1>
<p>Four score and seven years ago our fathers brought forth on this continent, a new nation, conceived in Liberty, and dedicated to the proposition that all men are created equal.
Now we are engaged in a great civil war, testing whether that nation, or any nation so conceived and so dedicated, can long endure. We are met on a great battle-field of that war.
We have come to dedicate a portion of that field, as a final resting place for those who here gave their lives that that nation might live.
It is altogether fitting and proper that we should do this.But, in a larger sense, we can not dedicate -- we can not consecrate -- we can not hallow -- this ground.
The brave men, living and dead, who struggled here, have consecrated it, far above our poor power to add or detract.
The world will little note, nor long remember what we say here, but it can never forget what they did here.
It is for us the living, rather, to be dedicated here to the unfinished work which they who fought here have thus far so nobly advanced.
It is rather for us to be here dedicated to the great task remaining before us --
that from these honored dead we take increased devotion to that cause for which they gave the last full measure of devotion --
that we here highly resolve that these dead shall not have died in vain -- that this nation, under God, shall have a new birth of freedom --
and that government of the people, by the people, for the people, shall not perish from the earth.</p>
</body>
</div>
<div style='border: solid 1px black; margin-bottom: 10px;' id="locationoptions">
<h3>How would you like to enter your location data?</h3>
<input type="radio" name="locationradios" id="byaddress">By physichal address?</input></br>
<input type="radio" name="locationradios" id="bylatlng">By latitude and longitude?</input>
</div>
<div style='border: solid 1px black; margin-bottom: 10px;' id="enteraddress">
<h3>Radio 1</h3>
</div>
<div style='border: solid 1px black;' id="entercoords">
<h3>Radio 2</h3>
</div>
</div>
</html>
回答by switz
Try using:
尝试使用：
$("input").is(':checked')
回答by Poonam
Try changing your if condition as
尝试将您的 if 条件更改为
if($("input[type='radio']:checked").attr('id') == "byaddress"){
$('#enteraddress').toggle();
}
instead of
代替
if ($('#byaddress:checked').val() == 'true') {
$('#enteraddress').toggle();
}
回答by Flater
$("selector").is(':checked')returns a boolean. So you can do:
$("selector").is(':checked')返回一个布尔值。所以你可以这样做：
if ( $("#byaddress").is(':checked') == true ) {
...
}
回答by Eae
<?php
?>
<!DOCTYPE html>
<html>
<head>
<title>My Title</title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.5/jquery.min.js"></script>
<script>
$(document).ready(function(){
$('#enteraddress').hide();
$('#entercoords').hide();
$('#theyellow').hide();
$("#radio01").click(function() {
if ($(this).is(':checked')) { $('#enteraddress').show(); $('#theyellow').show(); $('#entercoords').hide(); }
});
$("#radio02").click(function() {
if ($(this).is(':checked')) { $('#entercoords').show(); $('#theyellow').show(); $('#enteraddress').hide(); }
});
});
</script>
</head>
<body>
<form name="mymapgetter" action="action.php">
<div style='border: solid 1px black; margin-bottom: 10px;' id="legaldisclaimer">
<h1>Legal Disclaimer:</h1>
<p>Four score and seven years ago our fathers brought forth on this continent, a new nation, conceived in Liberty, and dedicated to the proposition that all men are created equal.
Now we are engaged in a great civil war, testing whether that nation, or any nation so conceived and so dedicated, can long endure. We are met on a great battle-field of that war.
We have come to dedicate a portion of that field, as a final resting place for those who here gave their lives that that nation might live.
It is altogether fitting and proper that we should do this.But, in a larger sense, we can not dedicate -- we can not consecrate -- we can not hallow -- this ground.
The brave men, living and dead, who struggled here, have consecrated it, far above our poor power to add or detract.
The world will little note, nor long remember what we say here, but it can never forget what they did here.
It is for us the living, rather, to be dedicated here to the unfinished work which they who fought here have thus far so nobly advanced.
It is rather for us to be here dedicated to the great task remaining before us --
that from these honored dead we take increased devotion to that cause for which they gave the last full measure of devotion --
that we here highly resolve that these dead shall not have died in vain -- that this nation, under God, shall have a new birth of freedom --
and that government of the people, by the people, for the people, shall not perish from the earth.</p>
</body>
</div>
<div style='border: solid 1px black; margin-bottom: 10px;' id="locationoptions">
<h3>How would you like to enter your location data?</h3>
<input type="radio" name="radio" value="" id="radio01">By physichal address?</input></br>
<input type="radio" name="radio" value="" id="radio02">By latitude and longitude?</input>
</div>
<div style='border: solid 1px black; margin-bottom: 10px;' id="enteraddress">
<h3>Enter your physichal address:</h3></br>
<input type="text" name="theaddress" value="" style="width: 100%;"></input>
</div>
<div style='border: solid 1px black;' id="entercoords">
<h3>Enter your latitude and longitude:</h3>
<input type="text" name="thelat" value=""><- Lat.</input><input type="text" name="thelng" value=""><- Lng.</input>
</div>
<input type="submit" id="theyellow" value="getmap" style="width: 100%"></input>
</form>
</html>
回答by pat capozzi
I looped through a set of input elements (this) and built a string that I then used to get the value of the 'name' (for form input)
我遍历了一组输入元素（this）并构建了一个字符串，然后我用它来获取“名称”的值（用于表单输入）
This is the only way I found to get the value of what was clicked in a radio button. Of course a form post would do the same thing but I could not actually do the submit.
这是我发现获取单选按钮中单击的值的唯一方法。当然，表单帖子会做同样的事情，但我实际上无法提交。
var findit = "input:radio[name=" + $(this).attr("name") + "]:checked";
console.log($(findit).val());
