Add config to make link interception opt-in

[brillout]

Description

By default, when using Client Routing, vite-plugin-ssr automatically intercepts links. You can opt-out with rel="external" (e.g. <a href="/admin" rel="external">).

Instead of opt-out, there could be a new config disableAutomaticLinkInterception, together with a new attribute data-vike-link to opt into Client Routing (e.g. <a href="/product/42" data-vike-link>).

The config can be set in a non-global fashion, i.e. each page can have a different disableAutomaticLinkInterception setting.

// /dashboard/+config.js

// The links displayed at URL `/dashboard` *aren't* intercepted 
export default {
  disableAutomaticLinkInterception: true
}

// /product/@id/+config.js

// The links displayed at URL `/product/42` *are* intercepted 
export default {
  disableAutomaticLinkInterception: false
}

[jahredhope]

I think this feature would be really valuable.

I raised my reasoning previously in #728

[brillout]

ETA this week.

[brillout]

Implemented. Set window._disableAutomaticLinkInterception = true and use <a data-vike-link>.

⚠️ _disableAutomaticLinkInterception will be removed in the next major release. Because, in the next major release, the link interceptor will be able to check whether the URL matches the route of a page, making _disableAutomaticLinkInterception obsolete. (The change requires a breaking change and that's why it can't be released already as v0.4.x.)

[brillout]

Pre-released in 0.4.131-commit-35ca471f7.