[discussion]: Should we prefix ::part names for components?

[gfellerph]

In a discussion with @oliverschuerch, the question about prefixes for parts arose.

/* Unprefixed part, scoped by the element selector */
post-accordion,
post-accordion-item {
  &::part(button) {
    color: red;
  }
}

/* Prefixed part with our default prefix */
::part(post-accordion-button) {
  font-size: 20px;
}

If un-scoped parts are being used, e.g. ::part(button), it's way simpler to write and multiple button parts can be targeted at the same time, but we're risking that a global style for another button part is interfering with our own parts.

Currently, we're using parts on some web components with generic names. Re-naming them would be breaking changes.

[oliverschuerch]

Currently affected components:

• post-accordion-item
• post-menu
• post-tabs

[alionazherdetska]

The topic is addressed in this poll: #6705