[英]How to properly destruct object within map function using javascript?
I would like to know how can i destruct object within .map
function using javascript, i have react js component and within return
method i have the code below:
return (
<>
{setItems.map(setItem => (
const { childContentfulPartFeatureSetLearnMoreOptionalTextTextNode: learnNode} = setItem
....
</>
我有下一个错误: Parsing error: Unexpected token... = setItem
,我想它是什么
EsLint
错误并使用// eslint-disable-next-line
禁用它,但它不起作用。
UPD 完整返回码:
return (
<div className={generalServiceItemClassName} key={guuid()}>
{setItems.map(setItem => (
const { childContentfulPartFeatureSetLearnMoreOptionalTextTextNode: learnNode} = setItem
<div
key={guuid()}
className={cx(columnSizeClass, "service-items__item")}
data-test="service-items"
>
{setItem.learnMore ? (
<LearnMore
className="service-items__item-learn-more-container"
learnMoreLink={setItem.learnMore}
text={}
textClassName="service-items__item-texts-learn-more"
learnMoreText={learnNode ? learnNode.setItem : null}
>
{renderItem(setItem)}
</LearnMore>
) : (
renderItem(setItem)
)}
</div>
))}
</div>
)
表达式中不能有const
声明,并且当您使用箭头 function 的简洁形式( =>
后面没有{
)时,主体是一个表达式。
不过,您可以在参数列表中解构。 例如:
{setItems.map(({childContentfulPartFeatureSetLearnMoreOptionalTextTextNode: learnNode}) => (
// ...use `learnNode` here...
在上下文中:
return (
<div className={generalServiceItemClassName} key={guuid()}>
{setItems.map(({childContentfulPartFeatureSetLearnMoreOptionalTextTextNode: learnNode}) => (
<div
key={guuid()}
className={cx(columnSizeClass, "service-items__item")}
data-test="service-items"
>
{setItem.learnMore ? (
<LearnMore
className="service-items__item-learn-more-container"
learnMoreLink={setItem.learnMore}
text={}
textClassName="service-items__item-texts-learn-more"
learnMoreText={learnNode ? learnNode.setItem : null}
>
{renderItem(setItem)}
</LearnMore>
) : (
renderItem(setItem)
)
}
</div>
))}
</div>
);
尝试这样的事情。 (解构和重命名)
const setItems = [{ abc: 5 }];
return (
<>
{setItems.map((setItem) => {
const { abc: xyz } = setItem;
return <div>{xyz}</div>;
})}
</>
);
// 替代方式,简化。
return (
<>
{setItems.map(({ abc: xyz }) => (
<div>{xyz}</div>
))}
</>
);
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