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为什么vue没有提供对数组属性的监听 #8562

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hfhan opened this issue Jul 27, 2018 · 4 comments
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为什么vue没有提供对数组属性的监听 #8562

hfhan opened this issue Jul 27, 2018 · 4 comments

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@hfhan
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hfhan commented Jul 27, 2018

What problem does this feature solve?

在vue中，通过Object.defineProperty实现了对对象属性的监听，但是Object.defineProperty对数组已有元素也是实现监听的，那么为什么vue中没有提供这一功能，使得arr[已有元素下标]=val变成响应式？

具体分析：https://segmentfault.com/a/1190000015783546?_ea=4074035

What does the proposed API look like?
@yyx990803
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yyx990803 commented Jul 27, 2018 •
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要求写得很清楚，不要用 issue 问问题。

看你的文章研究得挺有热情，破例回答一下：就是因为性能问题。

@hfhan
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hfhan commented Jul 27, 2018

尤大，我想问下究竟是什么样的性能问题限制了这一功能呢？因为现代浏览器以及电脑配置都还不错，监测几万乃至几十万个属性应该还是可以的，如果数组长度被限制，是不是就可以使用这一功能了？

@yyx990803
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性能代价和获得的用户体验收益不成正比。

@hfhan
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hfhan commented Jul 27, 2018

谢谢尤大，明白了。(◦˙▽˙◦)

@zjq1394288160 zjq1394288160 mentioned this issue Sep 18, 2019
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@Holybasil Holybasil mentioned this issue Dec 26, 2019
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@yh418807968 yh418807968 mentioned this issue Jan 9, 2020
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@7kyun 7kyun mentioned this issue Jul 14, 2022
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@yyx990803 @hfhan