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## 前言
使用过React的同学对于Virtual DOM并不陌生,作为React的重要核心概念,Virtual DOM凭借其高效的diff算法,让我们不用关心应用的性能问题,毫无顾忌地修改各种数据状态。在实际的开发中,我们并不需要关注Virtual DOM在一个框架中是如何运行的,但是理解Virtual DOM的实现原理却是非常有必要的,同时也有助于我们更加深入React。
## 一、…
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If you go to the Microbit snake lesson and go back after when the blocks are being rendered, the iframe is still in the DOM. And when you go to another microbit lesson, those blocks will be the blocks…
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when the global polymer option 'dom': is set to 'shadow', the FB.customCheckLoginState is not called after login.
Juste add the following lines:
`
window.Polymer = {
dom: 'shado…
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```
What steps will reproduce the problem?
1. I have tried the filter/highlight religions example
(http://simile.mit.edu/timeline/examples/religions/religions.html)
2. when running the code for buildi…
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```
What steps will reproduce the problem?
1.Have the following display
#wrap {
display: "aaaa" "bbbb" "cccc" "ddde" "ffgh" "ijjk" "lmmm" "nnnn" * * * 330px ;
}
2.In position: a there is a
.a { p…
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What would I add in the whitelist json to enable sessionstorage on a single site?
I can't seem to find it when looking through your massive code.
Also, keep up the work! :heart:
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Currently there's just one choice - to disable the storage. But it would make more sense to have it cleared on exit instead - just like Flash and normal cookies. Some sites (e.g. maps) require storage…
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Currently we're inserting scratchpad to the `CKEDITOR.document`.
Since Accessibility Checking engines rely on calculated styles for elements inside the inspected element, we have to make sure that st…
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```
What steps will reproduce the problem?
1. I have tried the filter/highlight religions example
(http://simile.mit.edu/timeline/examples/religions/religions.html)
2. when running the code for buildi…