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我寫了一個代碼,其中輸入框中所做的每個更改都反映在輸出框中,並且正常工作但問題是當我按Enter鍵以在輸出框中轉到新行時除非行長結束,否則不會進入新行。輸入按鈕不輸入新行在輸出框Reactjs
var App =React.createClass({
getInitialState:function(){
return{
value:"My Value"
}
},
updateValue:function(modifiedValue){
this.setState({
value:modifiedValue
})
},
render:function(){
return(
<div className="inputBox container-fluid">
<h1 className="text-center text-primary">Hello Coders !!!</h1>
<div className="row">
<div className="col-md-6 col-md-offset-1"><InputBox value={this.state.value} updateValue={this.updateValue}/></div>
<div className="outputBox col-md-6 col-md-offset-1">{this.state.value}</div>
</div>
</div>
);
}
});
var InputBox =React.createClass({
update:function(){
// var modifiedValue=ReactDOM.findDOMNode(this.refs.initialValue).value;
var modifiedValue=this.refs.initialValue.value;
// var modifiedValue= e.target.value
this.props.updateValue(modifiedValue);
},
render:function(){
return(
<textarea type="text" value={this.props.value} onChange={this.update} ref="initialValue">
</textarea>
);
}
});
ReactDOM.render(<App />,
document.querySelector("#app")
);
<!DOCTYPE html>
<head>
<meta charset="UTF-8" />
<title>React Tutorial</title>
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js"></script>
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<style>
.outputBox,textarea{
width: 400px;
border: 5px solid gray;
margin: 0;
height: 500px;
}
</style>
</head>
<div id="app"></div>
<script src="demo.js" type="text/babel"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.14.7/react.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.14.7/react-dom.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-core/5.8.23/browser.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/marked/0.3.2/marked.min.js"></script>
</body>
</html>
,你可以嘗試使用'dangerouslySetInnerHTML'這樣https://jsfiddle.net/69z2wepo/32970/,因爲在'textarea'進入有符號'\ n',但對於html,您必須使用'
' –
它的工作謝謝 – user5323957