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ts 为何不能将 null 分配给 null

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ts 为何不能将 null 分配给 null

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options.data的类型是?:null
this.data的类型是上面定义的private data:Object


与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
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