Bite sized JavaScript tutorials for busy developers Follow us on Substack: masteringjs.substack.com
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Pro tip: never, ever, use Mocha's `skip()` or `only()` functions to pick which tests to run
The `-g` flag lets you search tests by RegExp, use that instead
Learn more about Mocha 👉 masteringjs.io/tutorials/moc…
#JavaScript #CodeNewbie
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Common cause of bugs with @mongoosejs aggregations: `await Model.aggregate()` can return an empty array if there's no results.
Learn more 👉 masteringjs.io/tutorials/mon…
#MongoDB #NodeJS
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JavaScript's spread operator works with function arguments. Handy for calling functions that expect a spread of arguments when you have an array, like `unshift()`.
More about unshift 👉 masteringjs.io/tutorials/fun…
More about spread 👉 masteringjs.io/tutorials/fun…
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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…
Pro tip: WeakMaps are a great alternative to adding random properties or symbols to objects.
Map from object to value, without adding a property that messes with debug output
#JavaScript #CodeNewbie
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Here's how we check whether a function is an async function using prototypes.
More about async/await 👉 masteringjs.io/tutorials/fun…
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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…
Remember that `void` is NOT a function in JavaScript. Even though `void(0)` is valid.
Learn more 👉 masteringjs.io/tutorials/fun…
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Want to be able to `require()` or `import` HTML files in Webpack?
Add a rule of type 'asset/source' to `.html` files. No need for html-loader.
Learn more about running Webpack from Node.js 👉 masteringjs.io/tutorials/web…
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Mastering JS retweeted
Pro tip for developers:
1) Start a blog
2) Write about the problems you've solved
3) Become known as an "expert" bc you helped people solve problems faster
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