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[英]How to fix: ReactDOM.render() - TS2345: Argument of type '() => Element' is not assignable to parameter of type 'ReactElement'
[英]TS2345: Argument of type 'ReactNode' is not assignable to parameter of type 'ReactElement'
TS2345:“ReactNode”类型的参数不可分配给“ReactElement<any, string | 类型的参数” ((props: any) => ReactElement<any, any> | null) | (new (props: any) => 组件<any, any, any>)> | ReactElement<any, string |... 1 更多... | (new (props: any) => 组件<...>)>[]'。 类型 'undefined' 不可分配给类型 'ReactElement<any, string | ((props: any) => ReactElement<any, any> | null) | (new (props: any) => 组件<any, any, any>)> | ReactElement<any, string |... 1 更多... | (new (props: any) => 组件<...>)>[]'。
这是我的代码:
import React, {forwardRef, ReactNode} from 'react';
import {mergeClasses} from '../../utils';
import {ArrowLeft} from '../../icons';
import {BreadcrumbsProps} from './declarations/Breadcrumbs.types';
import defaultClasses from './styles/Breadcrumbs.module.css'
export const Breadcrumbs = forwardRef<HTMLLabelElement, BreadcrumbsProps>(
({
separator="/",
children,
back,
classNames,
onClick,
}) => {
const styles = mergeClasses(defaultClasses, classNames);
const Back = (
<button className={styles.back} type='button' onClick={onClick}>
<ArrowLeft/>
<span>Back</span>
</button>
)
const Separator = <span className={styles.separator}>{separator}</span>;
const getValidChild = (itemToRender: ReactNode, delta: number, index: number) => {
const SeparatorWithKey = React.cloneElement(Separator, { key: `${index}_separator` });
return index === 0 ? [itemToRender] : [SeparatorWithKey, itemToRender];
};
const getItemsByChildren = () => {
const delta = React.Children.toArray(children).length;
return (
React.Children.map(children, (child: React.ReactElement, index) => {
return (
child &&
getValidChild(
React.cloneElement(child),
delta,
index
)
);
}));
};
return (
<div className={styles.wrapper}>
{back && Back}
<ul className={styles.breadcrumbs}>
{getItemsByChildren()}
</ul>
</div>
);
},
);
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