Getting Error Uncaught TypeError: value.replace is not a function

Question

基本上我在 Reactjs 中创建一个 Markdown 预览器截至目前我得到了像未捕获的类型错误这样的错误：value.replace 不是一个函数并且不知道是什么导致它如果我删除 this.format 在这里有任何帮助从这里 dangerouslySetInnerHTML={this.format((this.rawMarkup()))} /> 工作正常但是在输入框上输入时如果我按回车键它不会带我到下一行

var App =React.createClass({
    getInitialState:function(){
        return{
            value:"My Value"
        }
    },
    updateValue:function(modifiedValue){
        this.setState({
            value:modifiedValue
        })
    },

    format: function (value) {
        return { __html: value.replace(/\r?\n/g, '<br>') };
    },
    rawMarkup: function() {
        var rawMarkup = marked(this.state.value.toString(), {sanitize: true});
        return { __html: rawMarkup };
    },
    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"
                        dangerouslySetInnerHTML={this.format((this.rawMarkup()))} />
                </div>
            </div>
        );
    }
});

var InputBox =React.createClass({
    update: function() {
        var modifiedValue = this.refs.initialValue.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>

Answer 1

因为您正在使用 markdown，所以您不需要将 \n 替换为 <br>，您只需将 breaks 选项设置为 true

rawMarkup: function() {
  return { __html: marked(this.state.value, { sanitize: true, breaks: true }) };
},

Example

Getting Error Uncaught TypeError: value.replace is not a function

Getting Error Uncaught TypeError: value.replace is not a function

reactjs

github-flavored-markdown