Bite sized JavaScript tutorials for busy developers Follow us on Substack: masteringjs.substack.com
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Annoying #VueJS gotcha that cost us some time recently: you can't name a component "footer".
Worked around it by naming it "footer-component"
github.com/vuejs/vue/issues/…
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Mastering JS retweeted
Node.js' built-in `assert` isn't just for tests! It is also a concise way to handle "if condition isn't true, throw error", no extra `if` required.
Can even use Chai for extra syntactic sugar: masteringjs.io/tutorials/moc…
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Node.js' built-in `assert` isn't just for tests! It is also a concise way to handle "if condition isn't true, throw error", no extra `if` required.
Can even use Chai for extra syntactic sugar: masteringjs.io/tutorials/moc…
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The Mastering JS website is 100% open source. Check it out on GitHub, and please star our repo! github.com/mastering-js/mast…
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Pro tip: `type: 'asset/source'` in Webpack lets you import selected files as plain text.
For example, with the below Webpack config, you can `import` CSS files to get the CSS file as a string
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JavaScript strings have a `contains()` method that checks if the string contains a substring.
But IE doesn't support `contains()`, so use `indexOf()` for frontend: masteringjs.io/tutorials/fun…
`indexOf()` was part of the first JavaScript spec in 1997!
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The Mastering JS website is 100% open source. Check it out on GitHub, and please star our repo! github.com/mastering-js/mast…
Two ways to shallow copy an array in JavaScript 👉 masteringjs.io/tutorials/fun…
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Mastering JS retweeted
Pro tip: `eslint . --fix` makes ESLint try to fix any warnings and errors. Doesn't work for all ESLint rules, but can save you a lot of repetitive work.
Learn more 👉 masteringjs.io/tutorials/esl…
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Pro tip: `eslint . --fix` makes ESLint try to fix any warnings and errors. Doesn't work for all ESLint rules, but can save you a lot of repetitive work.
Learn more 👉 masteringjs.io/tutorials/esl…
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The Mastering JS website is 100% open source. Check it out on GitHub, and please star our repo! github.com/mastering-js/mast…
TIL: if you're writing an executable script, better to use `/bin/bash` rather than `/bin/sh`
In Ubuntu, `/bin/sh` uses a slightly different shell than bash: stackoverflow.com/questions/…
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Switch/case statements are great when an early return is inelegant because you don't want to repeat a non-trivial `return`.
`break` breaks out of the switch statement 👍
masteringjs.io/tutorials/fun…
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Pro tip: you can append CSS to your page by creating a `style` tag. Handy when loading styles using `import` or `require()` with Webpack
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Love our tutorials?
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