Javascript 将函数提取到独立的reactjs组件抛出对象作为React子对象无效(找到:[对象窗口])
当我在组件中使用useRowCellSettings函数呈现下面的组件时,它不会出错,当将useRowCellSettings提取到独立组件中时,它会抛出错误Javascript 将函数提取到独立的reactjs组件抛出对象作为React子对象无效(找到:[对象窗口]),javascript,reactjs,react-component,react-functional-component,Javascript,Reactjs,React Component,React Functional Component,当我在组件中使用useRowCellSettings函数呈现下面的组件时,它不会出错,当将useRowCellSettings提取到独立组件中时,它会抛出错误 import React from "react"; const MyDatatable = (props) => { let columnHeaders = [ {title: "Id" , accessor: 'id' , index: 0}, {ti
import React from "react";
const MyDatatable = (props) => {
let columnHeaders = [
{title: "Id" , accessor: 'id' , index: 0},
{title: "Name" , accessor: 'name', width: "300px", index: 2}
]
let rowData = [
{id: 1, name: 'a', age: 29, qualification: 'B.com', rating: 3, profile: 'ps'},
{id: 2, name: 'b', age: 35, qualification: 'B.Sc', rating: 5, profile: 'h'}
]
const [headers, setHeaders] = React.useState(columnHeaders);
const [data, setData] = React.useState(rowData);
const renderContent = () => {
let contentView = data.map((row, rowIdx) => {
let id = row[keyField];
let tds = headers.map((header, index) => {
//grab the content of the column
let content = row[header.accessor];
let cell = header.custom_render_options;
content = useRowCellSettings(cell, content);
return (
<td key={index} data-id={id} data-row={rowIdx}>
{content}
</td>
);
});
return (
<tr key={rowIdx}>
{tds}
</tr>
);
//
}); //closes contentView variable
return contentView;
}
const useRowCellSettings = (cell, content) => {
if(cell) {
if (typeof(cell) === "object") {
//if (cell.type === 'image' && content) {
if (cell.type === 'image') {
//wrap the content with image tag & assign style from the cell
content = content ? <img style={cell.style} src={content} /> :
<><input type="file" id="img" name="img" /> </>
} //closes cell.type
} //close cell == object
else if (typeof(cell) === 'function') {
content = cell(content);
}
} //closes if cell
return content;
}
}
将useRowCellSettings提取到独立组件中,如下所示,然后在父组件中调用新的独立组件而不是useRowCellSettings函数,会导致错误:
对象作为找到的子对象无效:[对象窗口]。如果要呈现子对象集合,请改用数组
您混淆了内容变量。您需要重新格式化代码以提高可读性您尝试返回的内容是。您没有正确地在本地声明它感谢@Martin的这一点。在您的代码中还有其他地方您意外地创建了全局变量:查找ColumnHeader和rowData,它们不是在本地声明的
import React from "react";
const ImageType = (props) => {
if(props.cell) {
if (typeof(props.cell) === "object") {
if (props.cell.type === 'image') {
const content = props.content ? <img style={props.cell.style} src={content} /> : <input type="file" id="img" name="img" accept="image/*"/>
} //closes cel.type
} //close if cell == object
else if (typeof(props.cell) === 'function') {
const content = props.cell(content);
}
} //closes if cell
return content;
}
import React from 'react';
const ImageType = props => {
let content = null;
if (props.cell) {
if (typeof props.cell === 'object') {
if (props.cell.type === 'image') {
content = props.content ? (
<img style={props.cell.style} src={props.content} />
) : (
<input type='file' id='img' name='img' accept='image/*' />
);
}
} else if (typeof props.cell === 'function') {
content = props.cell(props.content);
}
}
return content;
};