Michael Hutchings midanosi
ciiqr
/ zod-optional-null.ts
Last active
February 17, 2026 14:36
zod optional/nullable/nullish differences
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| // zod schema | |
| z.object({ | |
| // valid if string or: | |
| optional: z.string().optional(), // field not provided, or explicitly `undefined` | |
| nullable: z.string().nullable(), // field explicitly `null` | |
| nullish: z.string().nullish(), // field not provided, explicitly `null`, or explicitly `undefined` | |
| }); | |
| // type | |
| { |
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| import { writable } from 'svelte/store' | |
| // returns a store with HTTP access functions for get, post, patch, delete | |
| // anytime an HTTP request is made, the store is updated and all subscribers are notified. | |
| export default function(initial) { | |
| // create the underlying store | |
| const store = writable(initial) | |
| // define a request function that will do `fetch` and update store when request finishes | |
| store.request = async (method, url, params=null) => { |