Template:Compare pages/sandbox

This is the template sandbox page for Template:Compare pages (diff).
See also the companion subpage for test cases.

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Similar to the {{Diff}} template, this template is intended to be useful for creating links to "diffs"; that is, links to pages that show the differences between two versions of a wiki page. The major difference is that {{Diff}} is intended to show two versions of the same page, and this one creates a link to Special:ComparePages to show one version of two different pages.

Every version of a page has a revision ID, which you can find from the history of the page by looking at the link for the timestamp, which is of the form:

https://en.wikipedia.org/w/index.php?title=SomePageName&oldid=442212827

The number after oldid= is the revision ID.

Given a page name and one or two revision IDs, you can construct links to several types of diffs.

Usage

{{Compare pages|page or oldid for page 1|page or oldid for page 2}}

page – The title of the page.
oldid – The revision ID onto which the diff is generated.

All parameters are required. Omitting parameters will return an error.

Examples

Code	Output
`{{Compare pages\|Foo\|Bar}}`	compare Foo to Bar This is the form that would be used most often.
`{{Compare pages\|Foo\|Bar\|Difference between pages}}`	Difference between pages
`{{Compare pages\|Foo}}`	Two pages are needed to compare.
`{{Compare pages\|\|Bar}}`	Two pages are needed to compare.