mergeMetaURL()function

mergeMetaURL(base: ImmutableURL | undefined, current: ImmutableURL | undefined, next: PossibleURL | undefined, params: PossibleURIParams | undefined, caller: AnyCaller = mergeMetaURL): ImmutableURL | undefined

Param	Type
`base`	`ImmutableURL`	Base URL to resolve `next` against.
`.href`	`URLString`	A URL string has a protocol and a //. required readonly
`.origin`	`URLString`	A URL string has a protocol and a //. required readonly
`.pathname`	`AbsolutePath`	Absolute path string starting with a / slash. required readonly
`current`	`ImmutableURL`	The current URL, used when `next` is unset.
`.href`	`URLString`	A URL string has a protocol and a //. required readonly
`.origin`	`URLString`	A URL string has a protocol and a //. required readonly
`.pathname`	`AbsolutePath`	Absolute path string starting with a / slash. required readonly
`next`	`PossibleURL`	The new (possibly relative) URL to resolve.
`params`	`PossibleURIParams`	URI params to set on the resolved URL (replaces existing params).
`caller`	`AnyCaller`	Function to attribute thrown URL-resolution errors to (defaults to `mergeMetaURL`). Defaults to `mergeMetaURL`

Return
`ImmutableURL \| undefined`	The resolved URL, or `undefined` if neither `next` nor `current` was set.

Merge a new metadata URL onto the current one, resolving it and applying params.

New URL is resolved relative to the base URL, falling back to current when unset.