您需要获取该选项的innerHTML，而不是它的值。

用这个。innerHTML代替this.selectedIndex。

编辑:首先需要获取option元素，然后使用innerHTML。

用这个。text代替this.selectedIndex。

使用- - - - - -

$.trim($("select").children("option:selected").text())   //cat

这里是小提琴- http://jsfiddle.net/eEGr3/

HTML:

<select id="box1" onChange="myNewFunction(this);">

JavaScript:

function myNewFunction(element) {
    var text = element.options[element.selectedIndex].text;
    // ...
}

演示:http://jsfiddle.net/6dkun/1/

纯JavaScript

var sel = document.getElementById("box1");
var text= sel.options[sel.selectedIndex].text;

jQuery:

$("#box1 option:selected").text();

试着选择

myNewFunction(sel) { alert (sel.options [sel.selectedIndex]。text); ｝ <select id="box1" onChange="myNewFunction(this);" > 狗<选项值= " 98 " > < /选项> 猫<选项值= " 7122 " > < /选项> 鸟<选项值= " 142 " > < /选项> < /选择>

试试下面的方法:

myNewFunction = function(id, index) {
    var selection = document.getElementById(id);
    alert(selection.options[index].innerHTML);
};

请看这里的jsfiddle示例

所有这些函数和随机的东西，我认为最好使用这个，像这样做:

this.options[this.selectedIndex].text

 <select class="cS" onChange="fSel2(this.value);">
     <option value="0">S?lectionner</option>
     <option value="1">Un</option>
     <option value="2" selected>Deux</option>
     <option value="3">Trois</option>
 </select>

 <select id="iS1" onChange="fSel(options[this.selectedIndex].value);">
     <option value="0">S?lectionner</option>
     <option value="1">Un</option>
     <option value="2" selected>Deux</option>
     <option value="3">Trois</option>
 </select><br>

 <select id="iS2" onChange="fSel3(options[this.selectedIndex].text);">
     <option value="0">S?lectionner</option>
     <option value="1">Un</option>
     <option value="2" selected>Deux</option>
     <option value="3">Trois</option>
 </select>

 <select id="iS3" onChange="fSel3(options[this.selectedIndex].textContent);">
     <option value="0">S?lectionner</option>
     <option value="1">Un</option>
     <option value="2" selected>Deux</option>
     <option value="3">Trois</option>
 </select>

 <select id="iS4" onChange="fSel3(options[this.selectedIndex].label);">
     <option value="0">S?lectionner</option>
     <option value="1">Un</option>
     <option value="2" selected>Deux</option>
     <option value="3">Trois</option>
 </select>

 <select id="iS4" onChange="fSel3(options[this.selectedIndex].innerHTML);">
     <option value="0">S?lectionner</option>
     <option value="1">Un</option>
     <option value="2" selected>Deux</option>
     <option value="3">Trois</option>
 </select>

 <script type="text/javascript"> "use strict";
   const s=document.querySelector(".cS");

 // options[this.selectedIndex].value
 let fSel = (sIdx) => console.log(sIdx,
     s.options[sIdx].text, s.options[sIdx].textContent, s.options[sIdx].label);

 let fSel2= (sIdx) => { // this.value
     console.log(sIdx, s.options[sIdx].text,
         s.options[sIdx].textContent, s.options[sIdx].label);
 }

 // options[this.selectedIndex].text
 // options[this.selectedIndex].textContent
 // options[this.selectedIndex].label
 // options[this.selectedIndex].innerHTML
 let fSel3= (sIdx) => {
     console.log(sIdx);
 }
 </script> // fSel

但是:

 <script type="text/javascript"> "use strict";
    const x=document.querySelector(".cS"),
          o=x.options, i=x.selectedIndex;
    console.log(o[i].value,
                o[i].text , o[i].textContent , o[i].label , o[i].innerHTML);
 </script> // .cS"

还有这个:

 <select id="iSel" size="3">
     <option value="one">Un</option>
     <option value="two">Deux</option>
     <option value="three">Trois</option>
 </select>


 <script type="text/javascript"> "use strict";
    const i=document.getElementById("iSel");
    for(let k=0;k<i.length;k++) {
        if(k == i.selectedIndex) console.log("Selected ".repeat(3));
        console.log(`${Object.entries(i.options)[k][1].value}`+
                    ` => ` +
                    `${Object.entries(i.options)[k][1].innerHTML}`);
        console.log(Object.values(i.options)[k].value ,
                    " => ",
                    Object.values(i.options)[k].innerHTML);
        console.log("=".repeat(25));
    }
 </script>

据我所知，有两种解决办法。

两者都只需要使用普通的javascript

1 selectedOptions

现场演示

const log = console.log; const areaSelect = document.querySelector(`[id="area"]`); areaSelect.addEventListener(`change`, (e) => { // log(`e.target`, e.target); const select = e.target; const value = select.value; const desc = select.selectedOptions[0].text; log(`option desc`, desc); }); <div class="select-box clearfix"> <label for="area">Area</label> <select id="area"> <option value="101">A1</option> <option value="102">B2</option> <option value="103">C3</option> </select> </div>

两个选择

现场演示

const log = console.log; const areaSelect = document.querySelector(`[id="area"]`); areaSelect.addEventListener(`change`, (e) => { // log(`e.target`, e.target); const select = e.target; const value = select.value; const desc = select.options[select.selectedIndex].text; log(`option desc`, desc); }); <div class="select-box clearfix"> <label for="area">Area</label> <select id="area"> <option value="101">A1</option> <option value="102">B2</option> <option value="103">C3</option> </select> </div>

---

使用普通JavaScript

onChange = { e => e.currentTarget.options[e.selectedIndex].text }

如果值在循环中，会给你精确的值。

在React中使用Typescript:

  const handleSelectChange: React.ChangeEventHandler<HTMLSelectElement> = (event) => {
    const {  options, selectedIndex } = event.target;
    const text = options[selectedIndex].text;
    // Do something...
  };

使用jquery。 在你看来

  let selText = $("#box1 option:selected").text();
  console.log(selText);

函数runCode() { var value = document.querySelector('#Country').value; window.alert(文档。querySelector(#国家选项(value = $ {value}]) .innerText); ｝ <select name="Country" id="Country"> 印度<选项值= " " > < /选项> <option value="GBR">United Kingdom </option> . " /option> . <option value="USA">美国</option> <option value="URY">乌拉圭</option> . <option value="UZB">乌兹别克斯坦</option> < /选择> <按钮onclick = " runCode ()按钮“> < / >

var selectionlist=document.getElementById("agents"); td2.innerHTML = selectionlist.children[selectionlist.selectedIndex].innerHTML;

ECMAScript 6 +。

const select = document.querySelector("#box1");

const { text } = [...select.options].find((option) => option.selected);