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How to use jquery to achieve linkage between provinces and municipalities
- 藏色散人Original
- 2021-12-01 10:55:053928browse
How to use jquery to realize linkage between provinces and municipalities: 1. Create an HTML sample file; 2. In the js file, pass "$(function() {for(var i = 0; i < prvo. length; i ) {...}}" method to achieve linkage between provinces and cities.
The operating environment of this article: windows7 system, jquery-2.1.4 version, DELL G3 computer
How to use jquery to realize province and city linkage?
Use jQuery to realize province and city three-level linkage menu
## Use jQuery to realize the three-level linkage menu of provinces and cities. If there are any deficiencies, I hope you can give me more guidanceHTML page<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>省市区联动菜单</title>
</head>
<body>
<!--选择省-->
<select id="prvoince">
<option>--请选择省份--</option>
</select>
<!--选择市-->
<select id="city">
<option>--请选择城市--</option>
</select>
<select id="district">
<option>--请选择区--</option>
</select>
<script src="jquery.js" type="text/javascript">
</script>
<script type="text/javascript" src="js/jq.js">
</script>
</body>
</html>
js pagevar prvo = [
"山西", "四川"];var cit = [
["太原市", "吕梁市", "临汾市", "运城市", "阳泉市"],
["成都市", "绵阳市", "雅安市", "乐山市", "眉山市"]];var dis = [
[
["小店区", "迎泽区"],
["吕梁1", "吕梁2"],
["临汾1", "临汾2"],
["运城1", "运城2"],
["阳泉1", "阳泉2"]
],
[
["成都1", "成都2"],
["绵阳1", "绵阳2"],
["雅安1", "雅安2"],
["乐山1", "乐山2"],
["眉山1", "眉山2"]
]]$(function() {
//初始化省份
for(var i = 0; i < prvo.length; i++) {
//每次循环加一个option标签
$("#prvoince").append("<option>" + prvo[i] + "</option>")
}
//---on---在选择元素上绑定一个或多个事件的事件处理函数
//加入change事件使在省发生改变时 发生改变
$("#prvoince").on('change', function() {
//清除元素,将上一次选择的内容清除掉,开始新一轮的选择
//$('#city').empty()
$('#city').text(' ');
$('#district').text(' ');
//利用选择器中的 :selected 方法匹配到所有的元素,然后再用index方法获得下标
//得到被选中省份的下标
var proIndex = $("#prvoince option:selected").index();
var citys = cit[proIndex - 1]
for(var i = 0; i < citys.length; i++) {
$("#city").append("<option>" + citys[i] + "</option>")
//[this.value]
}
})
$("#city").on('change',function(){
$("#district").empty()
var proIndex = $("#prvoince option:selected").index();
var citIndex = $("#city option:selected").index()
var distr = dis[proIndex - 1][citIndex]
for (var i = 0; i < distr.length; i++) {
$("#district").append("<option>" + distr[i]+ "</option>")
}
})})
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