reactjs - 如何在打字稿中实现 else 部分?
问题描述
我正在尝试在没有引用和显示时实现 else 部分no data is available
,但我目前正在使用带有 typescript 的 reactjs,如何实现此检查?
<div className="overview-text">
<div className="overview-text-header">References</div>
{data.reference.map((reference) => (
<div className="overview-text-item" key={reference}>{urlParser(reference)}</div> // if there is no data then no data available
))}
</div>
解决方案
这应该这样做:
<div>
{
data.reference && data.reference.length ?
(if part)
: (else part)
}
</div>
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