TypeError: react_dragula_1.default不是一个函数

Question

我试图测试Dragula与反应的拖放和发现问题。我发现了一个错误：

Uncaught : react_dragula_1.default不是函数

任何人都面临这个问题或解决这个问题的线索。

import * as React from "react";
import * as ReactDOM from 'react-dom';
import Dragula from 'react-dragula';

export class MultiPicklist extends React.Component {
    render() {
        return (<div className="swish-input-textarea">
                <div className='parent'>
                    <div className='wrapper'>
                        <div id='left-defaults' className='container' ref={this.dragulaDecorator} >
                            <div>Element 0</div>
                            <div>Element 1</div>
                            <div>Element 2</div>
                            <div>Element 3</div>
                        </div>
                        <div id='right-defaults' className='container'>
                            <div>Element a</div>
                            <div>Element b</div>
                            <div>Element c</div>
                            <div>Element d</div>
                            <div>Element e</div>
                        </div>
                    </div>
                </div>
                </div>);
    },
        dragulaDecorator = (componentBackingInstance) => {
            if (componentBackingInstance) {
                let options = { };
                console.log('componentBackingInstance');
                console.log(componentBackingInstance);
                Dragula([componentBackingInstance]);
             }
  };    

}

Answer 1

我看到您有点搞砸了ES6类语法。尝试在类定义之外拉出ref回调：

import * as React from "react";
import * as ReactDOM from 'react-dom';
import Dragula from 'react-dragula';

export class MultiPicklist extends React.Component {
    render() {
        return (<div className="swish-input-textarea">
                <div className='parent'>
                    <div className='wrapper'>
                        <div id='left-defaults' className='container' ref={dragulaDecorator} >
                            <div>Element 0</div>
                            <div>Element 1</div>
                            <div>Element 2</div>
                            <div>Element 3</div>
                    </div>
                        <div id='right-defaults' className='container'>
                            <div>Element a</div>
                            <div>Element b</div>
                            <div>Element c</div>
                            <div>Element d</div>
                            <div>Element e</div>
                        </div>
                    </div>
                </div>
                </div>);
    }

}  
const dragulaDecorator = (componentBackingInstance) => {
        if (componentBackingInstance) {
            let options = { };
            console.log('componentBackingInstance');
            console.log(componentBackingInstance);
            Dragula([componentBackingInstance]);
         }
};

您也可以在类方法中使用ES6箭头函数，但为此您需要启用Babel中的实验性特性来编译它。请检查此问题以获得更多详细信息：https://stackoverflow.com/a/31362350/4642844