实现select组件的选择输入过滤作用的js代码如下:

/**

*其中//******之间的部分显示的是在没有选择输入过滤功能的代码上加入的功能代码

**

/


(function ( $ ) {

    $.fn.editableSelect = function() {
var instanceVar;
//此this.each()指的就是对当前对象的遍历,这里的当前对象指代的就是对当前两个下拉选择框对象的一一遍历
this.each(function(){
var originalSelect = $(this);
//check if element is a select
if(originalSelect[0].tagName.toUpperCase()==="SELECT"){
//wrap the original select在原始的<select>外围插入<div></div>框
originalSelect.wrap($("<div/>"));
var wrapper = originalSelect.parent();
wrapper.css({display: "inline-block"});
//place an input which will represent the editable select
//在选择菜单上加入input输入框<input alt title ..... style="width:......" value="">
var inputSelect = $("<input/>").insertBefore(originalSelect);
//get and remove the original id
var objID = originalSelect.attr("id");
originalSelect.removeAttr("id");
//add the attributes from the original select
//input输入框的各种属性设置
inputSelect.attr({
alt: originalSelect.attr("alt"),
title: originalSelect.attr("title"),
class: originalSelect.attr("class"),
name: originalSelect.attr("name"),
disabled: originalSelect.attr("disabled"),
tabindex: originalSelect.attr("tabindex"),
id: objID
});
//get the editable css properties from the select
var rightPadding = 15;
inputSelect.css({
width: originalSelect.width()-rightPadding,
height: originalSelect.height(),
fontFamily: originalSelect.css("fontFamily"),
fontSize: originalSelect.css("fontSize"),
background: originalSelect.css("background"),
paddingRight: rightPadding
});
inputSelect.val(originalSelect.val());
//add the triangle at the right
var triangle = $("<div/>").css({
height: 0, width: 0,
borderLeft: "5px solid transparent",
borderRight: "5px solid transparent",
borderTop: "7px solid #999",
position: "relative",
top: -(inputSelect.height()/2)-5,
left: inputSelect.width()+rightPadding-10,
marginBottom: "-7px",
pointerEvents: "none"
}).insertAfter(inputSelect);
//create the selectable list that will appear when the input gets focus
//聚焦的时候加上<ol><ol/>下拉框
var selectList = $("<ol/>").css({
display: "none",
listStyleType: "none",
width: inputSelect.outerWidth()-2,
padding: 0,
margin: 0,
border: "solid 1px #ccc",
fontFamily: inputSelect.css("fontFamily"),
fontSize: inputSelect.css("fontSize"),
background: "#fff",
position: "absolute",
zIndex: 1000000
}).insertAfter(triangle);
//add options
  //在resourceData变量中存储当前下拉框中的所有数据
//******
var resourceData = [];
originalSelect.children().each(function(index, value){
prepareOption($(value).text(), wrapper);
resourceData.push($(value).text());
});
//******
//bind the focus handler
//在鼠标聚焦的时候fadeIn(100),即下拉显示当前下拉框
inputSelect.focus(function(){
selectList.fadeIn(100);
//v存储的是在input输入框中输入的内容,如果输入的内容不为空,就在存储原始下拉框的所有数据中找到出现v中字符的数据压入newResourceData变量中
//******
var v = inputSelect.val();
var newResourceData = [];
if(v != "") {
$.each(resourceData, function(i, t){
if(t.indexOf(v) != -1)
newResourceData.push(t);
});
}
wrapper.children("ol").empty();
$.each(newResourceData, function(i, t){
prepareOption(t, wrapper);
});
//******
}).blur(function(){
selectList.fadeOut(100);
}).keyup(function(e){
if(e.which==13) inputSelect.trigger("blur");
//在enter快捷键按下后弹起的时候执行的事件
//******
var v = inputSelect.val();
var newResourceData = [];
if(v != "") {
$.each(resourceData, function(i, t){
if(t.indexOf(v) != -1)
newResourceData.push(t);
});
}
wrapper.children("ol").empty();
$.each(newResourceData, function(i, t){
prepareOption(t, wrapper);
});
//******
});
//hide original element
originalSelect.css({visibility: "hidden", display: "none"}); //save this instance to return it
instanceVar = inputSelect
}else{
//not a select
return false;
}
});//-end each /** public methods **/ /**
* Adds an option to the editable select
* @param {String} value - the options value
* @returns {void}
*/
instanceVar.addOption = function(value){
prepareOption(value, instanceVar.parent());
}; /**
* Removes a specific option from the editable select
* @param {String, Number} value - the value or the index to delete
* @returns {void}
*/
instanceVar.removeOption = function(value){
switch(typeof(value)){
case "number":
instanceVar.parent().children("ol").children(":nth("+value+")").remove();
break;
case "string":
instanceVar.parent().children("ol").children().each(function(index, optionValue){
if($(optionValue).text()==value){
$(optionValue).remove();
}
});
break;
}
}; /**
* Resets the select to it's original
* @returns {void}
*/
instanceVar.restoreSelect = function(){
var originalSelect = instanceVar.parent().children("select");
var objID = instanceVar.attr("id");
instanceVar.parent().before(originalSelect);
instanceVar.parent().remove();
originalSelect.css({visibility: "visible", display: "inline-block"});
originalSelect.attr({id: objID});
}; //return the instance
return instanceVar;
}; /** private methods **/
//prepareOption函数的作用就是在当前下拉框中添加新选项
function prepareOption(value, wrapper){
var selectOption = $("<li>"+value+"</li>").appendTo(wrapper.children("ol"));
var inputSelect = wrapper.children("input");
selectOption.css({
padding: "3px",
textAlign: "left",
cursor: "pointer"
}).hover(
function(){
selectOption.css({backgroundColor: "#eee"});
},
function(){
selectOption.css({backgroundColor: "#fff"});
});
//bind click on this option
selectOption.click(function(){
inputSelect.val(selectOption.text());
inputSelect.trigger("change");
});
} }( jQuery ));

如何实现select组件的选择输入过滤作用的更多相关文章

  1. vue自定义select组件

    1.目的 看了很多element-ui的源码,决定自己实现一个简单的select组件,遇到的几个难点,便记录下来. 2.难点一 element-ui中的select组件通过v-model可以绑定数据, ...

  2. vue+element ui中select组件选择失效问题原因与解决方法

    codejing 2020-07-10 09:13:31  652  收藏 分类专栏: Web Vue Element UI 版权 .当表单form赋完值后,如果后续又对form中某一属性值进行操作如 ...

  3. select组件2

    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/ ...

  4. select组件

    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/ ...

  5. freemarker写select组件(一)

    freemarker写select组件 1.宏定义 <#macro select id datas> <select id="${id}" name=" ...

  6. freemarker写select组件报错总结(一)

    1.具体错误如下 六月 25, 2014 11:26:29 下午 freemarker.log.JDK14LoggerFactory$JDK14Logger error 严重: Template pr ...

  7. freemarker写select组件(五)

    freemarker写select组件 1.宏定义 <#macro select id datas value="" key="" text=" ...

  8. freemarker写select组件(四)

    freemarker写select组件 1.宏定义 <#macro select id datas value="" key="" text=" ...

  9. freemarker写select组件(三)

    freemarker写select组件 1.宏定义 <#macro select id datas value="" key="" text=" ...

随机推荐

  1. Cassandra - Non-system keyspaces don't have the same replication settings, effective ownership information is meaningless

    In cassandra 2.1.4, if you run "nodetool status" without any keyspace specified, you will ...

  2. C# in Depth阅读笔记1:C#1特性

    1.委托 委托是对包含返回值和参数的行为的一种封装,类似于单一方法的接口. 委托是不易变的(就像string),system.delegate下的combine和remove方法都只能产生一个新的委托 ...

  3. SQL中DATEPART返回日期单独部分

    定义和用法 DATEPART() 函数用于返回日期/时间的单独部分,比如年.月.日.小时.分钟等等. 语法 DATEPART(datepart,date) date 参数是合法的日期表达式.datep ...

  4. NOPI 导出excel 通用方法

    public static byte[] ExportExcel<T>(Dictionary<string, string> columnsHeader, List<T& ...

  5. UIButton, KVC, KVO

    按钮 自定义按钮:调整内部子控件的frame 方式1:实现titleRectForContentRect:和imageRectForContentRect:方法,分别返回titleLabel和imag ...

  6. C++_String

    String -String的实现 -String常用操作

  7. python基础:列表生成式和生成器

    列表生成式(List Comprehension) 列表生成式即List Comprehensions,是Python内置的非常简单却强大的可以用来创建list的生成式. 举个例子,要生成 list ...

  8. js:关于IE6/7下new Date(值)输出为NaN的解决方案

    不得不再次说,万恶的IE,你太守旧了吧,这里出错的原因是IE的时间格式,不是2012-01-23(很多人喜欢用这样的格式) 而是2012/01/23(怎么感觉像是在用VB6和access啊) 搞了好久 ...

  9. 稀疏图(邻接链表),并查集,最短路径(Dijkstra,spfa),最小生成树(kruskal,prim)

    全部函数通过杭电 1142,1162,1198,1213等题目测试. #include<iostream> #include<vector> #include<queue ...

  10. WIFI无线adb调试android

    有个需求需要支持android插上键盘,鼠标等外设,但是这样就不能使用microusb口进行adb调试了. 研究了一番,发现可以利用wifi进行adb无线调试(adb应该本身已经支持无线调试). WI ...