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Thanks to Github Pages + Jekyll, roblao.com up and running much more reliably

Github Pages + Jekyll is free and reliabe. And it’s fun to use it to make a website.

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Jest mock module not working? double check these

Jest mock module feature can be used for mocking whole or part of packages in your project. Check out: https://jestjs.io/docs/manual-mocks

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Two vanillajs frontend coding tutorials my code snippets

Here is the two videos:

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From bash to zsh, very basic things need to do

After upgrading MacOS to Catalina, everytime opening a terminal, there would be a prompt saying:

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LetsEncrypt Certbot renew successfully, but still got expired certificate from client(browser, curl or wget) side, what's the problem?

This article is just a trouble-shooting blog. It’s rarely happen. After you even did a force renew by using

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