[英]if checkbox checked change the select options
I would like to generate selects options depends on checkbox. 我想生成选择选项取决于复选框。 Like I have checkbox with 3 values: Film, Videoclip, Serial and
<select>
form. 就像我有3个值的复选框一样:Film,Videoclip,Serial和
<select>
形式。 When I click "Film" I would like to have <select>
with option: Comedy, Horror & when I "Videoclip" <select>
will change values to: Hip-Hop, Pop. 当我单击“电影”时,我希望具有
<select>
选项:喜剧,恐怖和“ Videoclip”时, <select>
会将值更改为:“嘻哈音乐”,“流行音乐”。
I'm trying for a few hours with javascript & jquery but still nothing :/ 我正在尝试用javascript&jquery几个小时,但还是没有什么:/
Can you try using jQuery and events something like this? 您可以尝试使用jQuery和类似事件的事件吗?
$(function () { var checked = ["Check 1", "Check 2", "Check 3"]; var unchecked = ["Uncheck 1", "Uncheck 2", "Uncheck 3"]; function updateSelect (arr) { $("select").html(""); $.each(arr, function (i, v) { $("select").append('<option value="' + v + '">' + v + '</option>'); }); } updateSelect (unchecked); $("#check").change(function () { if (this.checked) updateSelect(checked); else updateSelect(unchecked); }); });
<script src="https://code.jquery.com/jquery-1.9.1.js"></script> <label><input type="checkbox" id="check" /> Check</label><br /> <select></select>
Your snippet is now ready. 现在您的代码段已准备就绪。 Have a look:
看一看:
$(function () { var iFilm = ["Comedy", "Horror", "Sci-Fi"]; var iVideoClip = ["Hip-Hop", "Pop", "Rap"]; var iSerial = ["Serial 1", "Serial 2", "Serial 3"]; $("input:checkbox").change(function () { $("select").html(""); $("input:checked").each(function () { addItemsFromArray(eval("i" + this.id)); }); }); function addItemsFromArray (arr) { $.each(arr, function (i, v) { $("select").append('<option value="' + v + '">' + v + '</option>'); }); } });
<script src="https://code.jquery.com/jquery-1.9.1.js"></script> <label><input type="checkbox" id="Film" /> Film</label><br /> <label><input type="checkbox" id="VideoClip" /> VideoClip</label><br /> <label><input type="checkbox" id="Serial" /> Serial</label><br /> <select></select>
Note: I have used eval
, which is strongly discouraged. 注意:强烈建议不要使用
eval
。 Without using eval
, the other part is using data-*
attributes. 不使用
eval
,另一部分使用data-*
属性。
$(function () { var data = {}; data.iFilm = ["Comedy", "Horror", "Sci-Fi"]; data.iVideoClip = ["Hip-Hop", "Pop", "Rap"]; data.iSerial = ["Serial 1", "Serial 2", "Serial 3"]; $("input:checkbox").change(function () { $("select").html(""); $("input:checked").each(function () { addItemsFromArray(data[$(this).attr("data-content")]); }); }); function addItemsFromArray (arr) { $.each(arr, function (i, v) { $("select").append('<option value="' + v + '">' + v + '</option>'); }); } });
<script src="https://code.jquery.com/jquery-1.9.1.js"></script> <label><input type="checkbox" id="Film" data-content="iFilm" /> Film</label><br /> <label><input type="checkbox" id="VideoClip" data-content="iVideoClip" /> VideoClip</label><br /> <label><input type="checkbox" id="Serial" data-content="iSerial" /> Serial</label><br /> <select></select>
On a different note, if you wanna make only one option selectable at a time, feel free to change from type="checkbox"
to type="radio"
and give the same name. 另一方面,如果您想一次仅选择一个选项,请随时从
type="checkbox"
更改为type="radio"
并使用相同的名称。
From your questions, I assume you have 3 checkbox with different value for each. 根据您的问题,我假设您有3个复选框,每个复选框都有不同的值。 If your application only allows 1 option, why dont use radio button instead?
如果您的应用程序仅允许1个选项,为什么不使用单选按钮呢?
Aside from that, it is actually quite easy. 除此之外,它实际上很容易。 Just put the "onchange" event listener on your checkbox and then populate your
<select>
tag (whether using pre-written variable or ajax) 只需将“ onchange”事件侦听器放在您的复选框上,然后填充您的
<select>
标记(无论使用预写变量还是ajax)
simple example in vanilla js 香草js中的简单示例
<input type="checkbox" value="film" id="film">
<select id="someDropdown"></select>
<script>
var film = document.getElementById("film");
film.addEventListener("change", function(){
// populate the dropdown list
var options = "<option>Comedy</option>" + "<option>Horror</option>"
document.getElementById("someDropdown").innerHTML = options;
});
</script>
Try this: 尝试这个:
var filmValues = {
comedy: 'Comedy',
horror: 'Horror'
}
$('#filmCb').change(function () {
if ($(this).is(":checked")) {
$.each(filmValues, function (key, value) {
$('#filmSelect')
.append($("<option></option>")
.attr("value", key)
.text(value));
});
} else {
$('#filmSelect').empty()
}
});
The html: 的HTML:
<form action="">
<input id="filmCb" type="checkbox" name="param" value="film">Film
<select id="filmSelect"></select>
<br>
</form>
<?php // Genre
$query = "SELECT genre_pl FROM genre WHERE is_movie = 1 ";
$result = mysqli_query($connection, $query);
// Test if there was a query error
confirm_query($result); ?>
<script> var options_film = ""; </script>
<?php
while($row = mysqli_fetch_row($result)){
?>
<pre> <?php var_dump($row) ?> </pre>
<script> options_film += "<option>" + <?php echo json_encode($row); ?> + "</option>"; </script>
<?php } ?>
<?php mysqli_free_result($result); ?>
<script type="text/javascript">
var film = document.getElementById("film");
film.addEventListener("change", function(){
// populate the dropdown list
document.getElementById("someDropdown").innerHTML = options_film;
});
It works! 有用! But I feel it's sloppy programming.
但是我觉得这是草率的编程。 It is okay to mix javascript with php just like that?
可以像这样将javascript与php混合在一起吗?
here is a small bit of code to make each checkbox selected individually. 这是一小段代码,用于分别选中每个复选框。
$(document).ready(function(){
$("#Film").click(function(){
`$("#Film").prop("checked", false);
});
$("#VideoClip").click(function(){
`$("#VideoClip").prop("checked", false);
});
$("#Serial").click(function(){
`$("#Serial").prop("checked", false);
});
});
And the HTML : 和HTML:
<label><input type="checkbox" id="Film" data-content="iFilm" /> Film</label><br />
<label><input type="checkbox" id="VideoClip" data-content="iVideoClip" />
VideoClip</label><br />
<label><input type="checkbox" id="Serial" data-content="iSerial" /> Serial</label>
<br
/>
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.