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"last 2 versions" considered harmful There comes a time in every developer's life when they come to realize their thoughtleaders misled them. Oh, we've really done it now. So remember how we told you all to use babel-preset-env? { "presets": [ ["env", { "targets": { "browsers": [ "last 2 versions" ] } }] ] } See browserlist coverage We told you to use it because it would only compile the things th

I didn't want to be the guy write this post, but I am because Chris told me to so blame that fuckin guy. I'm a victim here. But you're all using const in JavaScript too much and it does bug me just ever so little. 1. const doesn't do shit and we all know it For starters, let's agree that const is fucking useless and we're inventing meaning... const THIS_SHOULDNT_CHANGE = { right: "?" }; THIS_SHOUL

Why there is no order, and how to deal with that A Babel config looks something like this: { presets: ["preset-1", "preset-2"], plugins: ["plugin-3"] } Since presets are essentially just a list of plugins, internally Babel reduces this config down to something like this: { plugins: ["plugin-1", "plugin-2", "plugin-3"] } It's natural to think that this becomes the order of which plugins run, but th

What they are, how they work, and why they are the way they are This article is also available in Russian Private class fields are now at Stage 2 in the JavaScript standard process. It's not finalized yet, but the JavaScript standards committee expects the feature to be developed and eventually included in the standard (although it may still change). The syntax (currently) looks like this: class P

A comparison between the two on-boarding processes Let's imagine a scenario where we want to adopt a type checker... Lately we've been noticing a lot of NaN's show up in our app. We search for the source and find the following code: // math.js function square(n) { return n * n; } square("oops"); We sigh to ourselves, and decide maybe it's finally time to add a type checker. We step back and take a

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