在react中使用antd创建可编辑的表格，使用createContext( )报错？

Question

1.在react中使用antd创建可编辑行元素的表格，
官方文档中是这样写的：

import { Table, Input, InputNumber, Popconfirm, Form } from 'antd';

const data = [];
for (let i = 0; i < 100; i++) {
  data.push({
    key: i.toString(),
    name: `Edrward ${i}`,
    age: 32,
    address: `London Park no. ${i}`,
  });
}
const FormItem = Form.Item;
***const EditableContext = React.createContext();***

const EditableRow = ({ form, index, ...props }) => (
  <EditableContext.Provider value={form}>
    <tr {...props} />
  </EditableContext.Provider>
);

const EditableFormRow = Form.create()(EditableRow);

class EditableCell extends React.Component {
  getInput = () => {
    if (this.props.inputType === 'number') {
      return <InputNumber />;
    }
    return <Input />;
  };
  render() {
    const {
      editing,
      dataIndex,
      title,
      inputType,
      record,
      index,
      ...restProps
    } = this.props;
    return (
      <EditableContext.Consumer>
        {(form) => {
          const { getFieldDecorator } = form;
          return (
            <td {...restProps}>
              {editing ? (
                <FormItem style={{ margin: 0 }}>
                  {getFieldDecorator(dataIndex, {
                    rules: [{
                      required: true,
                      message: `Please Input ${title}!`,
                    }],
                    initialValue: record[dataIndex],
                  })(this.getInput())}
                </FormItem>
              ) : restProps.children}
            </td>
          );
        }}
      </EditableContext.Consumer>
    );
  }
}

class EditableTable extends React.Component {
  constructor(props) {
    super(props);
    this.state = { data, editingKey: '' };
    this.columns = [
      {
        title: 'name',
        dataIndex: 'name',
        width: '25%',
        editable: true,
      },
      {
        title: 'age',
        dataIndex: 'age',
        width: '15%',
        editable: true,
      },
      {
        title: 'address',
        dataIndex: 'address',
        width: '40%',
        editable: true,
      },
      {
        title: 'operation',
        dataIndex: 'operation',
        render: (text, record) => {
          const editable = this.isEditing(record);
          return (
            <div>
              {editable ? (
                <span>
                  <EditableContext.Consumer>
                    {form => (
                      <a
                        href="javascript:;"
                        onClick={() => this.save(form, record.key)}
                        style={{ marginRight: 8 }}
                      >
                        Save
                      </a>
                    )}
                  </EditableContext.Consumer>
                  <Popconfirm
                    title="Sure to cancel?"
                    onConfirm={() => this.cancel(record.key)}
                  >
                    <a>Cancel</a>
                  </Popconfirm>
                </span>
              ) : (
                <a onClick={() => this.edit(record.key)}>Edit</a>
              )}
            </div>
          );
        },
      },
    ];
  }
  isEditing = (record) => {
    return record.key === this.state.editingKey;
  };
  edit(key) {
    this.setState({ editingKey: key });
  }
  save(form, key) {
    form.validateFields((error, row) => {
      if (error) {
        return;
      }
      const newData = [...this.state.data];
      const index = newData.findIndex(item => key === item.key);
      if (index > -1) {
        const item = newData[index];
        newData.splice(index, 1, {
          ...item,
          ...row,
        });
        this.setState({ data: newData, editingKey: '' });
      } else {
        newData.push(data);
        this.setState({ data: newData, editingKey: '' });
      }
    });
  }
  cancel = () => {
    this.setState({ editingKey: '' });
  };
  render() {
    const components = {
      body: {
        row: EditableFormRow,
        cell: EditableCell,
      },
    };

    const columns = this.columns.map((col) => {
      if (!col.editable) {
        return col;
      }
      return {
        ...col,
        onCell: record => ({
          record,
          inputType: col.dataIndex === 'age' ? 'number' : 'text',
          dataIndex: col.dataIndex,
          title: col.title,
          editing: this.isEditing(record),
        }),
      };
    });

    return (
      <Table
        components={components}
        bordered
        dataSource={this.state.data}
        columns={columns}
        rowClassName="editable-row"
      />
    );
  }
}

ReactDOM.render(<EditableTable />, mountNode);

我是按照官方文档来写的，代码中加粗部分就是我出错的地方。
2.报错如下：

app.js:149015 Uncaught TypeError: _react2.default.createContext is not a function

---

Answer 1

createContext 是react16才有的api，看看你的react版本

Answer 2

打印一下React,如果为undefined,在js开头加上import React from 'react';

Answer 3

首先react升级到最近版本，然后在引入下react，实测可用！
import React from 'react';
如图，直接用antd的例子