joepie91

ES Modules are terrible, actually

This post was adapted from an earlier Twitter thread.

It's incredible how many collective developer hours have been wasted on pushing through the turd that is ES Modules (often mistakenly called "ES6 Modules"). Causing a big ecosystem divide and massive tooling support issues, for... well, no reason, really. There are no actual advantages to it. At all.

It looks shiny and new and some libraries use it in their documentation without any explanation, so people assume that it's the new thing that must be used. And then I end up having to explain to them why, unlike CommonJS, it doesn't actually work everywhere yet, and may never do so. For example, you can't import ESM modules from a CommonJS file! (Update: I've released a module that works around this issue.)

And then there's Rollup, which apparently requires ESM to be u

jlevy

// These hashes are for algorithmic use cases, such as bucketing in hashtables, where security isn't
// needed and 32 or 64 bits is enough (that is, rare collisions are acceptable). These are way simpler
// than sha1 (and all its deps) or similar, and with a short, clean (base 36 alphanumeric) result.

// A simple, *insecure* 32-bit hash that's short, fast, and has no dependencies.
// Output is always 7 characters.
// Loosely based on the Java version; see
// https://stackoverflow.com/questions/6122571/simple-non-secure-hash-function-for-javascript
const simpleHash = str => {
  let hash = 0;

stolksdorf

/* Non-mutating */
const map    = (obj,fn)=>Object.keys(obj).map((key)=>fn(obj[key],key));
const reduce = (obj,fn,init)=>Object.keys(obj).reduce((a,key)=>fn(a,obj[key],key),init);
const filter = (obj,fn)=>Object.keys(obj).reduce((a,key)=>!!fn(obj[key],key)?a.concat(obj[key]):a,[]);
const times  = (n,fn)=>Array.apply(null,{length:n}).map((_,i)=>fn(i));

const construct = (obj,fn)=>Object.keys(obj).reduce((a,key)=>{const [k,v]=fn(obj[key],key);a[k]=v;return a;},{});
const sequence = async (obj,fn)=>Object.keys(obj).reduce((a,key)=>a.then((r)=>fn(obj[key],key,r)), Promise.resolve());

max-mapper

paulirish

/* bling.js */

window.$ = document.querySelectorAll.bind(document);

Node.prototype.on = window.on = function (name, fn) {
  this.addEventListener(name, fn);
}

NodeList.prototype.__proto__ = Array.prototype;