React JS onClick事件处理程序 [英] React JS onClick event handler

问题描述

我有

var TestApp = React.createClass({
      getComponent: function(){
          console.log(this.props);
      },
      render: function(){
        return(
             <div>
             <ul>
                <li onClick={this.getComponent}>Component 1</li>
             </ul>
             </div>
        );
      }
});
React.renderComponent(<TestApp />, document.body);

我想为点击的列表元素的背景着色。我怎么能在React中做到这一点？

I want to color the background of the clicked list element. How can I do this in React ?

类似

$('li').on('click', function(){
    $(this).css({'background-color': '#ccc'});
});

推荐答案

为什么不呢：

onItemClick: function (event) {

    event.currentTarget.style.backgroundColor = '#ccc';

},

render: function() {
    return (
        <div>
            <ul>
                <li onClick={this.onItemClick}>Component 1</li>
            </ul>
        </div>
    );
}

如果你想了解更多React-ive，你可能想要将所选项目设置为其包含的React组件的状态，然后引用该状态以确定渲染中项目的颜色：

And if you want to be more React-ive about it, you might want to set the selected item as state of its containing React component, then reference that state to determine the item's color within render:

onItemClick: function (event) {

    this.setState({ selectedItem: event.currentTarget.dataset.id });
    //where 'id' =  whatever suffix you give the data-* li attribute
},

render: function() {
    return (
        <div>
            <ul>
                <li onClick={this.onItemClick} data-id="1" className={this.state.selectedItem == 1 ? "on" : "off"}>Component 1</li>
                <li onClick={this.onItemClick} data-id="2" className={this.state.selectedItem == 2 ? "on" : "off"}>Component 2</li>
                <li onClick={this.onItemClick} data-id="3" className={this.state.selectedItem == 3 ? "on" : "off"}>Component 3</li>
            </ul>
        </div>
    );
},

当然，你想把那些< li> 进入循环，你需要制作 li.on 和 li.off 样式设置背景颜色。

Of course, you'd want to put those <li>s into a loop, and you need to make the li.on and li.off styles set your background-color.

这篇关于React JS onClick事件处理程序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！