* Fix#8655, skip rendering meta tags with undefined props
* Filter all tags, not just meta
* Only render defined props
* Remove filtering of undefined strings
Co-Authored-By: Tim Neutkens <tim@timneutkens.nl>
* Replace Object.entries
* Remove filtering code
* Simplify code
* Add test
* Add tests for undefined head prop value and tweak check
* Update to strip undefined prop values to match react
* Update head.js
Co-authored-by: Tim Neutkens <tim@timneutkens.nl>
Co-authored-by: Joe Haddad <timer150@gmail.com>
Co-authored-by: JJ Kasper <jj@jjsweb.site>
Fixes#3494
Removes `class="next-head"` from the children of the `<Head>` component. Instead, a single sentinel meta element named `next-head-count` is appended. The content is the number of contiguous elements immediately preceding the sentinel that _would have had_ the `class="next-head"` attribute.
During an update, instead of searching for `class="next-head"`, the sentinel is located and the N previous elements are considered candidates for `oldTags`. New elements are inserted before the sentinel, and finally the sentinel is updated to reflect the new count.
* Run prettier over packages/**/*.js
* Run prettier over packages/**/*.ts
* Run prettier over examples
* Remove tslint
* Run prettier over examples
* Run prettier over all markdown files
* Run prettier over json files
