本文介绍了使用纯 JavaScript 获取事件的选择元素值的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!
问题描述
我想在单击选择元素时获取选择元素的值!我想在 HTML 中没有 onchange
属性.
I want to get the value of a select element when the select element is clicked! I want to do it without an onchange
attribute in the HTML.
我想在没有 jQuery 的情况下实现这一点.当这个小脚本是我唯一需要的东西时,我不想在这个网站中包含一个 jQuery 框架.
I would like to achieve this without jQuery. I don't want to include a jQuery framework into this website when this tiny script is the only thing I need.
var select_element = document.getElementById('product-form-user-enquiry-type');
select_element.onchange = function(e){
if (!e)
var e = window.event;
var svalue = select_element.value;
alert( svalue );
}
if ( select_element.captureEvents ){
select_element.captureEvents(Event.CHANGE);
}
select_element.value;
包含一个空字符串.我该怎么做?
The select_element.value;
contains an empty string. How should I do this?
推荐答案
适用于所有浏览器(包括 IE8)的解决方案:
A solution that will work with all browsers (including IE8) :
var select_element = document.getElementById('product-form-user-enquiry-type');
select_element.onchange = function() {
var elem = (typeof this.selectedIndex === "undefined" ? window.event.srcElement : this);
var value = elem.value || elem.options[elem.selectedIndex].value;
alert(value);
}
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