我有一个这样的下拉列表:
<select id="box1">
<option value="98">dog</option>
<option value="7122">cat</option>
<option value="142">bird</option>
</select>
我如何才能获得实际的选项文本，而不是使用JavaScript的值?我可以通过如下方式获取值:
<select id="box1" onChange="myNewFunction(this.selectedIndex);" >
但我想要猫而不是7122。
当前回答
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>
其他回答
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>
在React中使用Typescript:
const handleSelectChange: React.ChangeEventHandler<HTMLSelectElement> = (event) => {
const { options, selectedIndex } = event.target;
const text = options[selectedIndex].text;
// Do something...
};
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
