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21 lines
1.3 KiB
Markdown
21 lines
1.3 KiB
Markdown
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# PhantomShim
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PhantomShim is a phantomJS script runner built atop of Puppeteer API.
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### Q: Can I use PhantomShim to run my scripts?
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No.
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PhantomShim aims to pass PhantomJS tests rather then to be a valid PhantomJS script runner:
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- PhantomShim shortcuts a lot of corners (e.g. [handling only a few keys](https://github.com/GoogleChrome/puppeteer/blob/4269f6a1bb0c2d1cc27a9ed1132017669c33a259/phantom_shim/WebPage.js#L75) that are necessary to pass tests).
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- PhantomShim spawns [nested event loops](https://github.com/abbr/deasync) to emulate PhantomJS execution model. This might result in unpredictable side-effects, e.g. in [unexpected reenterability](https://github.com/GoogleChrome/puppeteer/blob/4269f6a1bb0c2d1cc27a9ed1132017669c33a259/phantom_shim/WebPage.js#L694).
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### Q: What's the purpose of PhantomShim?
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The goal is to prove comprehensiveness of Puppeteer API.
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PhantomShim is built atop of Puppeteer API and is used to run PhantomJS tests.
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Whenever PhantomShim can't implement certain capability to pass phantomJS test, Puppeteer API is improved to make it possible.
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### Q: Are there plans to evolve PhantomShim into a real PhantomJS script runner?
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No.
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On the contrary, PhantomShim is likely to be removed from the Puppeteer repository as it passes all interesting PhantomJS tests.
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