I have
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);
我想为单击的列表元素的背景着色。我怎样才能在 React 中做到这一点?
就像是
$('li').on('click', function(){
$(this).css({'background-color': '#ccc'});
});
Why not:
onItemClick: function (event) {
event.currentTarget.style.backgroundColor = '#ccc';
},
render: function() {
return (
<div>
<ul>
<li onClick={this.onItemClick}>Component 1</li>
</ul>
</div>
);
}
如果你想更加 React-ive,你可能需要将所选项目设置为其包含 React 组件的状态,然后引用该状态来确定项目的颜色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>
);
},
你想把那些<li>
s 进入一个循环,你需要使li.on
and li.off
风格设定你的background-color
.
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