ReactJS-即使从选择下拉列表中选择了相同的选项，也会触发事件 [英] ReactJS - trigger event even if the same option is selected from select dropdown

问题描述

当从ReactJS的下拉列表中选择一个选项时，如何触发事件.目前，我正在使用 onChange ，但是即使再次选择相同的选项，我也需要触发一个事件.

How do I fire an event when an option is selected from dropdown in ReactJS. Currently I am using onChange but I need to fire an event even if same option is selected again.

当前代码:

<select name="select1" onChange={this.onChangeOption}>
    <option value='A'>Please select A...</option>
    <option value='B'>Please select B...</option>
    <option value='C'>Please select C...</option>
    <option value='D'>Please select D...</option>
</select>

我什至尝试将 onClick 处理程序添加到选项中，但是由于仅适用于元素，因此在单击选项时不会触发.

I even tried adding onClick handler to option but that does not fire on click over the options as it works only with elements.

我知道有使用jquery的解决方案，方法是将click事件与option元素绑定在一起，但是在React中需要一个解决方案.不想仅为此要求包括jQuery.

I know there are solutions using jquery by binding click event with option element, but need a solution in React. Dont want to include jQuery for only this requirement.

推荐答案

这是技巧，但如果您需要对所有更改都执行功能，即使更改了相同的选项，我也只知道一种解决方案-使用onClick和详细信息:

This is trick, but if you need to fire function with the all changes, even with change of the same option, only one solution I know - use onClick and its detail:

class Select extends React.Component{
    onChangeOption(e){
        if (e.detail === 0){
            console.log(e.target.value);
        }
    }
    render(){
        return (
            <select name="select1" onClick={this.onChangeOption}>
                <option value='A'>Please select A...</option>
                <option value='B'>Please select B...</option>
                <option value='C'>Please select C...</option>
                <option value='D'>Please select D...</option>
            </select>
        )
    }
}

https://jsfiddle.net/69z2wepo/86140/

这篇关于ReactJS-即使从选择下拉列表中选择了相同的选项，也会触发事件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！