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Navigation

With anchor tags​

In hash mode (the default), you navigate between pages with normal anchor (<a>) tags using the # prefix:

<a href="#/book/123">Thus Spoke Zarathustra</a>

In path mode (hashMode={false}), use regular paths:

<a href="/book/123">Thus Spoke Zarathustra</a>

Rather than typing # before each link — and to keep the same markup working in both routing modes — you can use the use:link action. You always write paths starting with / and the router handles the rest:

<script>
    import { link } from '@bmlt-enabled/svelte-spa-router'
</script>

<a href="/book/321" use:link>The Little Prince</a>

The use:link action accepts an optional parameter opts, which can be one of:

  • A dictionary {href: '/foo', disabled: false} where both keys are optional:
    • If you set a value for href, your link will be updated to point to that address, reactively (this always takes precedence over the href attribute, if present).
    • Setting disabled: true disables the link, so clicking it has no effect.
  • A string with a destination (e.g. /foo), which is shorthand for {href: '/foo'}.

For example:

<script>
    import { link } from '@bmlt-enabled/svelte-spa-router'
    let myLink = '/book/456'
</script>

<!-- Note the {{...}} notation because we're passing an object as parameter for a Svelte action -->
<a use:link={{ href: myLink, disabled: false }}>The Biggest Princess</a>

The above is equivalent to:

<a use:link={myLink}>The Biggest Princess</a>

Changing the value of myLink reactively updates the link's href attribute.

You can navigate between pages programmatically too:

import { push, pop, replace } from '@bmlt-enabled/svelte-spa-router'

// push(url) navigates to another page, just like clicking on a link
push('/book/42')

// pop() is equivalent to hitting the back button in the browser
pop()

// replace(url) navigates to a new page, but without adding a new entry in the
// browser's history stack — so the back button won't return to the previous page
replace('/book/3')

These methods can be used inside Svelte markup too, for example:

<button onclick={() => push('/page')}>Go somewhere</button>
Navigation happens on the next tick

push, pop, and replace perform their navigation only in the next iteration ("tick") of the JavaScript event loop. This makes it safe to use them inside onMount callbacks.

They return a Promise that resolves once the navigation has been triggered (on the next tick) — but note that this is likely before the new page has rendered.