react jsx 编写autocomplete实现

发布时间：2020-12-15 04:38:36 所属栏目：百科来源：网络整理

导读：auto_complete.html !DOCTYPEhtmlhtmlheadmetacharset="UTF-8"/titleHelloReact!/titlelinkhref="css/auto_complete.css"rel="stylesheet"/scriptsrc="jslib/jquery-1.11.3.min.js"/scriptscriptsrc="jslib/react.js"/scriptscriptsrc="jslib/react-dom.js"/

auto_complete.html

<!DOCTYPEhtml>
<html>
<head>
<metacharset="UTF-8"/>
<title>HelloReact!</title>

<linkhref="css/auto_complete.css"rel="stylesheet"/>

<scriptsrc="jslib/jquery-1.11.3.min.js"></script>
<scriptsrc="jslib/react.js"></script>
<scriptsrc="jslib/react-dom.js"></script>
<scriptsrc="jslib/browser-2.8.23.min.js"></script>
</head>
<body>

<divid="autocomplete"></div>


<scripttype="text/babel"src="js/auto_complete.js"></script>
</body>
</html>

css/auto_complete.js

varAutoComplete=React.createClass({
	list:["apple","banana","grape","org","orange"],timeout:null,getInitialState:function(){
		return{
			open:null,matchedItems:this.generateLiHtml(this.list)
		}
	},generateLiHtml:function(list){
		varmatchedItems=[];
for(vari=0;i<list.length;i++){
			
matchedItems.push(<likey={i}onClick={this.clickHandler}>{list[i]}</li>);
}
returnmatchedItems;
	},clickHandler:function(e){
e.stopPropagation();
e.preventDefault();

varliItem=$(e.target);

varcontent=$(liItem).html();

$(ReactDOM.findDOMNode(this)).find("input").val(content);
this.setState({open:""});

},keyUpHandler:function(e){
e.stopPropagation();

clearTimeout(this.timeout);

		varval=e.target.value;

		varthat=this;

this.timeout=setTimeout(function(){
		varresult=[];

for(vari=0;i<that.list.length;i++){
varitem=that.list[i];
if(item.startsWith(val)){
result.push(item);
}
}

		varopen=null;
if(result.length>0){
		open="open";
}

varmatchedItems=that.generateLiHtml(result);
that.setState({matchedItems:matchedItems,open:open});
},300);

},render:function(){

return(
<divclassName="auto-complete">
<inputtype="text"onKeyUp={this.keyUpHandler}/>
<divclassName={this.state.open}>
<ul>
{this.state.matchedItems}
</ul>
</div>
</div>
);
}
});


ReactDOM.render(
<AutoComplete/>,$("#autocomplete")[0]
);

css/auto_complete.css

.auto-complete{
	width:200px;

}

.auto-completeinput{
	width:100%;
	box-sizing:border-box;
}
.auto-complete>div{
	display:none;
	padding-top:10px;
}

.auto-complete>div.open{display:block;}

.auto-complete>divul{
	padding:0;
	margin:0;
	list-style-type:none;
	border:1pxsolid#ccc;
}

.auto-complete>divulli{
	height:30px;
	line-height:30px;
	border-bottom:1pxsolid#ccc;
	padding-left:10px;
}

.auto-complete>divulli:hover{
	background-color:#eaeaea;
	cursor:pointer;
}

.auto-complete>divulli:last-child{
	border-bottom:none;
}

（编辑：李大同）

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