danecando’s gists

danecando / spm-install.sh

Last active November 27, 2025 13:38

npm install, but for swift package manager

	#!/usr/bin/env bash
	set -euo pipefail

	usage() {
	cat <<'EOF'
	Usage: spm-install <github-user>/<repo>[@<selector>] [<target>...]

	Examples:
	spm-install alex-pinkus/tree-sitter-swift CodeHighlight
	spm-install alex-pinkus/[email protected] CodeHighlight CodeHighlightTests

danecando / awaiter.tsx

Last active May 1, 2025 11:49

	import * as React from "react";

	interface Props<T extends Promise<any>[]> {
	promises: T;
	children: (results: { [P in keyof T]: Awaited<T[P]> }) => React.ReactNode;
	}

	export function Awaiter<T extends Promise<any>[]>({ promises, children }: Props<T>) {
	const results = React.use(Promise.all(promises));
	return <>{children(results)}</>;

danecando / policy.ts

Last active April 19, 2025 13:34

A simple TypeScript Policy library that can be shared between frontend and backend code

	type Cond<Args extends any[], TReturn = boolean> = TReturn \| ((...args: Args) => TReturn);

	interface PolicyActionResult {
	permission: boolean;
	invariant: Error \| undefined;
	actionable: boolean;
	}

	interface PolicyActionFn<Args extends any[] = []> {
	(...args: Args): PolicyActionResult;

danecando / action.tsx

Created October 28, 2024 01:12

Sprinkle client side state/validation on server action form

	"use server";

	import { redirect } from "next/navigation";
	import { z } from "zod";

	let signUpSchema = z.object({
	email: z.string().min(1, "Email is required").email("Please enter a valid email address"),
	displayName: z.string().min(2, "Display name must be at least 2 characters"),
	password: z.string().min(6, "Password must be at least 6 characters"),
	confirmation: z.string().min(6, "Password confirmation must be at least 6 characters"),

danecando / api-client-endpoints.ts

Created October 15, 2023 22:46

Type safety using json schemas from server to client application

	import type { RecordResponse, ListResponse, PaginatedListResponse } from "@pkg/core/api";
	import { UserMapper, type UserEntity } from "@pkg/core/user";

	export type EntityIdResponse = RecordResponse<{ id: string }>;

	/**
	* start:users endpoints
	*/
	export type UserEntityResponse = RecordResponse<UserEntity>;
	export type UserEntityListResponse = ListResponse<UserEntity>;

danecando / tailwind-color-vars.js

Created September 5, 2022 13:09

A simple plugin that exposes all tailwind colors as css variables on :root

	function ({ addBase, theme }) {
	function extractColorVars(colorObj, colorGroup = '') {
	return Object.keys(colorObj).reduce((vars, colorKey) => {
	const value = colorObj[colorKey];

	const newVars =
	typeof value === 'string'
	? { [`--color${colorGroup}-${colorKey}`]: value }
	: extractColorVars(value, `-${colorKey}`);

danecando / query.ts

Last active July 18, 2022 01:04

Meetings layout EdgeDB query experiment

danecando / useAsyncState.ts

Last active July 14, 2022 14:50

A utility hook for managing async effects in a component

danecando / useCurrentItemScroller.ts

Last active June 23, 2022 00:33

React hook for auto scrolling a list of children that have a aria-current attribute

	import type {RefObject} from 'react';
	import {useEffect} from 'react';

	const defer = (fn: () => void) => setTimeout(fn, 0);

	export function useCurrentItemScroller(containerRef: RefObject<HTMLElement>) {
	useEffect(() => {
	const containerEl = containerRef.current;
	let observer: MutationObserver \| undefined;
	if (containerEl) {

danecando / SerializeType.ts

Last active June 7, 2022 11:12

SerializeType utility for converting a type to JSON

	// credit @colinhacks
	// https://github.com/remix-run/remix/pull/1254

	type JSONPrimitives = string \| number \| boolean \| null;
	type NonJSONPrimitives = undefined \| Function \| symbol;

	export type SerializeType<T> = T extends JSONPrimitives
	? T
	: T extends undefined
	? undefined

Dane Grant danecando