Svelte Hash

Easy URL hash management for Svelte.

svelte-hash provides a simple way to manage URL hash/fragment in Svelte.

[!NOTE] This library is client-side only, meaning SvelteKit (SSR) is not supported.

Installation

# Bun
bun i -D svelte-hash

# NPM
npm i -D svelte-hash

# Yarn
yarn add -D svelte-hash

# PNPM
pnpm add -D svelte-hash

Usage

[!TIP] It's really suggested to have a look to these interactive examples to test the library and understand the functionality (there you can see hash/fragment updates in the URL).

First of all, create and export a new hash store instance:

// store.ts
import { createHashStore } from 'svelte-hash'

interface Hash {
    foo: string
    bar: string
}

export const hash = createHashStore<Hash>()

[!NOTE]

• Explicitly defining the type of the hash is optional, but extremely suggested as it provides type checking and autocompletion
• Currently only string values are supported: this might change in the future with v2
• Only one hash store can be initialized in the same project: multiple hash stores initialization will throw an error

Then, you can use the hash store in your components:

<!-- App.svelte -->
<script>
    import { hash } from './store.ts'

    // Prevent pushing to browser history every change with a "proxy" variable
    // Every hash key could also not exist, so we need to provide a default value
    let valueProxy = hash.foo || ''
</script>

<!-- The form will update the hash value only when submitted -->
<!-- result (on submit) will be: <URL>#foo={valueProxy} -->
<form on:submit|preventDefault={() => hash.foo = valueProxy}>
    <input type="text" bind:value={valueProxy} />
    <button type="submit">Submit</button>
</form>
<p>

To delete a hash key from the URL, you can set it to a falsy value:

import { hash } from './store.ts'

hash.foo = null
// or
hash.foo = undefined
// or
hash.foo = ''

Behind the scenes

The reason I created this library was to accomplish a simple URL hash/fragment management for my Svelte music player, Musicale (you should really check it out!).

I originally created the implementation directly in that project, but then I decided to extract it and make it a standalone library for everyone to use.

Why do I call URL fragment "hash"?

On the browser, to access the URL fragment you use window.location.hash, so I decided to take that for the library name.

Contributing

We :heart: contributions!
Feel free to open an issue or a pull request but follow Contributing Guidelines.

If you don't know where to start, check out the help wanted issues!

License

GPL-3.0 License here.