Skip to content

Instantly share code, notes, and snippets.

@AndrewIngram
AndrewIngram / CurrentTime.tsx
Created November 21, 2023 00:04
Current time in React without hydration errors
import { Suspense } from "react";
import CurrentTimeClient from "./CurrentTimeClient";
export default function CurrentTime() {
const locale = "en-GB";
const dateConfig = {
hour: "numeric",
minute: "numeric",
second: "numeric",
import * as React from 'react';
const useIsFirstRender = (): boolean => {
const isFirst = React.useRef(true);
if (isFirst.current) {
isFirst.current = false;
return true;
} else {
@trvswgnr
trvswgnr / concurrency.js
Last active January 20, 2024 09:29
run up to n concurrently, catching and returning errs
async function processItems(items, fn) {
const errs = [];
let i = 0;
const workers = Array(25)
.fill()
.map(async () => {
while (i < items.length) {
await fn(items[i++]).catch((e) => errs.push(e));
}
});
@bouroo
bouroo / sse-worker.js
Last active October 6, 2025 11:40
example for cloudflare worker server-sent events
/**
* Cloudflare Worker for Server-Sent Events (SSE)
*
* This worker demonstrates how to set up an SSE endpoint
* that sends an initial message and then periodic updates.
*/
// Listen for incoming requests
addEventListener('fetch', event => {
event.respondWith(handleRequest(event.request));
@jacobparis
jacobparis / timing.server.ts
Created April 29, 2023 23:24
Server Timing Utilities for Remix
export type PerformanceServerTimings = Record<
string,
Array<PerformanceServerTiming>
>
/**
* Run this on the server to get a `time` function that can be used to time
* server-side operations and add them to the `Server-Timing` header.
*/
export function getServerTiming() {
import invariant from "tiny-invariant";
class AmalgoBox extends HTMLElement {
get input() {
return this.querySelector("input") as HTMLInputElement;
}
get button() {
return this.querySelector("button") as HTMLButtonElement;
}
@steveruizok
steveruizok / cache.ts
Last active November 30, 2025 21:59
weak map gist
export class Cache<T extends object, K> {
items = new WeakMap<T, K>()
get<P extends T>(item: P, cb: (item: P) => K) {
if (!this.items.has(item)) {
this.items.set(item, cb(item))
}
return this.items.get(item)!
}
import * as React from 'react'
import { SpringValue, easings, useSpring } from 'react-spring'
/**
* Hook that animates height when args.animationKey changes
*
* Ex:
* const animatedBlock = useAnimatedHeight({
* animationKey: key,
* })
@jonathantneal
jonathantneal / ui-monospace.css
Created July 31, 2022 23:16
CSS ui-monospace polyfill (448 bytes minified, 182 gzipped)
/* These rules are ignored when ui-monospace is supported. */
@font-face { font-family: ui-monospace; src:
/* MacOS (El Capitan +) */
local(Menlo-Regular),
/* Windows (11 +) */
local(CascadiaCode-Regular),
/* Windows (Vista +) */
local(Consolas),
/* Android */
local(RobotoMono-Regular),
/* https://go.tacodewolff.nl/minify */
enScroll=!1,enFdl=!1,extCurrent=void 0,filename=void 0,targetText=void 0,splitOrigin=void 0;const lStor=localStorage,sStor=sessionStorage,doc=document,docEl=document.documentElement,docBody=document.body,docLoc=document.location,w=window,s=screen,nav=navigator||{},extensions=["pdf","xls","xlsx","doc","docx","txt","rtf","csv","exe","key","pps","ppt","pptx","7z","pkg","rar","gz","zip","avi","mov","mp4","mpe","mpeg","wmv","mid","midi","mp3","wav","wma"];function a(e,t,n,o){const j="G-XXXXXXXXXX",r=()=>Math.floor(Math.random()*1e9)+1,c=()=>Math.floor(Date.now()/1e3),F=()=>(sStor._p||(sStor._p=r()),sStor._p),E=()=>r()+"."+c(),_=()=>(lStor.cid_v4||(lStor.cid_v4=E()),lStor.cid_v4),m=lStor.getItem("cid_v4"),v=()=>m?void 0:enScroll==!0?void 0:"1",p=()=>(sStor.sid||(sStor.sid=c()),sStor.sid),O=()=>{if(!sStor._ss)return sStor._ss="1",sStor._ss;if(sStor.getItem("_ss")=="1")return void 0},a="1",g=()=>{if(sStor.sct)if(enScroll==!0)return sStor.sct;else x=+sStor.getItem("sct")+ +a,sSto