我有一个简单的组件来显示无效的表单条目,显然只应在所述表单条目无效时呈现消息 . 据我所知,我正确使用了条件返回语句,但我仍然收到错误 .
这是组件:
从'react'中导入React;从'prop-types'导入PropTypes;
function FormErrors ({formErrors}) {
Object.keys({formErrors}).map((field, i) => {
if ({formErrors}[field].length > 0) {
return (
<p key={i}>{field} {formErrors[field]}</p>
)
} else {
return null;
}
})
}
export default FormErrors;
传入的道具:
formErrors: {email: '', password: ''};
并且我收到的错误消息:
Invariant Violation: FormErrors(...): Nothing was returned from render. This usually means a return statement is missing. Or, to render nothing, return null.
1 回答
你错过了
return