feat(search): enable contextual search by default

[slorber]

Breaking changes

• Default value change that might impact your site's search behavior, use contextualSearch: false to revert to previous behavior

Motivation

Contextual Search has been widely used and makes sense for most sites

We can now safely turn this on by default (it has always been the long-term goal).

Fixes issues reported on versioned and i18n sites not enabling it. For example #5880

Have you read the Contributing Guidelines on pull requests?

yes

Test Plan

dogfood

[netlify]

✔️ [V2]

🔨 Explore the source changes: 2299bcb

🔍 Inspect the deploy log: https://app.netlify.com/sites/docusaurus-2/deploys/61e8436bcc022f000891f04e

😎 Browse the preview: https://deploy-preview-6407--docusaurus-2.netlify.app

[github-actions]

⚡️ Lighthouse report for the changes in this PR:

Category	Score
🟠 Performance	67
🟢 Accessibility	98
🟢 Best practices	93
🟢 SEO	100
🟢 PWA	92

Lighthouse ran on https://deploy-preview-6407--docusaurus-2.netlify.app/

[github-actions]

Size Change: 0 B

Total Size: 680 kB

ℹ️ View Unchanged

Filename	Size
website/.docusaurus/globalData.json	43.5 kB
website/build/assets/css/styles.********.css	103 kB
website/build/assets/js/main.********.js	504 kB
website/build/index.html	29.6 kB

_{compressed-size-action}

[hasezoey]

from my testing, our site's search kinda broke after the update (not displaying anything when searching), so we had to set contextualSearch: false, our site does not use languages or versioning yet

[slorber]

You may have a bad/outdated index crawling config, and it only works without contextual search.

If you want versioning/i18n later, you'd rather update that config

[hasezoey]

You may have a bad/outdated index crawling config, and it only works without contextual search.

i literally had updated that config to what the example at Docusaurus v2 template showed ~15 days ago (because of the algolia migration, where the old config (automatic config) didnt work anymore), so i dont think i am using a too much outdated config (also, i dont modify that config myself, because i dont really understand all the options and the default work fine)

[slorber]

@hasezoey then there might be another unexpected problem.

If you deploy your site on a preview branch with contextual search enabled, we could inspect it more easily and see what is wrong

[hasezoey]

If you deploy your site on a preview branch with contextual search enabled, we could inspect it more easily and see what is wrong

deploy as in visitable from the web or deployed as in commits?

when its commits, i have it still have the old commits

Commits:

• commit of docusaurus v2 beta 15 with defaults: typegoose/typegoose@60ef053 (deployed with typegoose/typegoose@0378f20)
• commit of docusaurus v2 beta 15 with contextual search disabled: typegoose/typegoose@f1f3f40 (deployed with typegoose/typegoose@6b2b6c7)

(can also be reproduced from local deployment, when contextual search is disabled, local search works, if enabled it does not)