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up.navigate() docs suggest I can omit the URL and use the main target, but that throws an error #268
Description
Given a setup like so, to emulate turbolinks:
<script src="https://unpkg.com/unpoly@2.2.1/unpoly.js"></script>
<script>
up.log.enable();
up.link.config.followSelectors.push('a[href]');
up.form.config.submitSelectors.push('form');
</script>
I end up with what I presume is main target of body, because that gets augmented with up-source='/..../.
If I then try and use up.navigate() in the console, as a vague facsimile to window.location.reload() it errors like so:
> up.render() needs either { url, content, fragment, document } option
> Uncaught (in promise) up.Failed: up.render() needs either { url, content, fragment, document } option
at build (https://unpkg.com/unpoly@2.2.1/unpoly.js:2038:23)
at Object.fn [as failed] (https://unpkg.com/unpoly@2.2.1/unpoly.js:2047:27)
at Object.fail (https://unpkg.com/unpoly@2.2.1/unpoly.js:12079:24)
at Object.assertContentGiven (https://unpkg.com/unpoly@2.2.1/unpoly.js:8641:20)
at https://unpkg.com/unpoly@2.2.1/unpoly.js:13529:30
at Object.asyncify (https://unpkg.com/unpoly@2.2.1/unpoly.js:1585:36)
at https://unpkg.com/unpoly@2.2.1/unpoly.js:13515:18
at mockableFn (https://unpkg.com/unpoly@2.2.1/unpoly.js:22:36)
at https://unpkg.com/unpoly@2.2.1/unpoly.js:13579:16
at Object.mockableFn [as navigate] (https://unpkg.com/unpoly@2.2.1/unpoly.js:22:36)
>
which, I guess, makes sense. It needs a URL, same as the contract for up.visit(url). But the documentation (for 2.2) for up.navigate(target, options) says of target If omitted a main target will be rendered. Meanwhile, up.reload() works fine for the purposes of refreshing the body fragment (the main target?), but didn't achieve the results I was hoping for because the <title>...</title> doesn't get updated (I guess because it doesn't count as a navigation option, hence the dive into navigate()
(Edit: immediately after opening this I note that I can just use up.reload({navigate: true}) for my purposes, but I think issue around navigate without a target may still be relevant)
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