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otakustay avatar otakustay commented on July 28, 2024

这个功能现在是用compute来实现的,可以这么写:

useDerivedState(
    propValue,
    (propValue, stateValue) => {
        return customEquals(propValue, stateValue) ? stateValue : propValue;
    }
);

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yuxuan avatar yuxuan commented on July 28, 2024

emm, 但是当props为非primitive的值时,还是会一直触发这个compute不是,触发下面两次setState,但是实际上是想说props是没变的。不一定是默认值,默认值可以memo或者提到constant去来解决。

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otakustay avatar otakustay commented on July 28, 2024

因为React在setState时值一样是会bail out的,所以下面的2次setState只有第2次实际生效。而第二次讲道理是不应该跳过的

我感觉你更需要useOriginalCopyuseDerivedState联合使用

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yuxuan avatar yuxuan commented on July 28, 2024

了解

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