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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.

Every version of a page has a revision ID, which you can find from the history of the page by looking at the timestamp link for the edit. The timestamp link is in this form:
http[s]://en.wikipedia.org/w/index.php?title=SomePageName&oldid=442212827
The number after oldid= is the revision ID.

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

Usage

title – The title of the page (optional in most cases)
diff – The ID or keyword that is used against the base ID. Possible keywords are:
cur – Compare with the current version of a page.

prev – Compare with the previous version of a page.

next – Compare with the next version of a page.

id – This should be larger than oldid.
oldid – The base ID onto which the diff is generated.
label – Text to display as link (optional)‍—‌no label will generate a numbered link as the label.
|diffonly=yes – Displays the page comparisons only (optional)‍—‌parameter name required if used.

Only the diff parameter is required; all other parameters are optional. Omitted parameters must be empty (by using a double pipe). You can also use the named parameters title, diff, oldid, and label.

Helper subtemplate

In order to make this template simpler to use the helper subtemplate {{Diff/translator}} is available, to be used only in the preview window.

Syntax: {{Diff/translator|label|url=diff URL}}

For instance, imagine you want to refer to the following diff URL: https://en.wikipedia.org/w/index.php?title=Main_Page&diff=139993&oldid=139992&diffonly=1; you only need to transcribe that URL in the {{Diff/translator}} subtemplate and produce a preview, without saving the page:

{{Diff/translator|Sic exorsi sumus|url=https://en.wikipedia.org/w/index.php?title=Main_Page&diff=139993&oldid=139992&diffonly=1}}

↳ {{Diff|Main Page|139993|139992|Sic exorsi sumus|diffonly=yes}}

Now copy the code generated ({{Diff|Main Page|139993|139992|Sic exorsi sumus|diffonly=yes}}) into the edit window where {{Diff/translator}} was and publish the page.

Examples

Below each example in the left-hand column is the pseudocode for that example in brown italics and indented. Elements that should be entered literally are in brown bold underlined italics. When a parameter is left blank, the resulting two adjacent pipes are underlined (but not bolded): ||.

Code	Output
`{{Diff\|Main Page\|prev\|204901573\|Diff between a numbered version and the previous version}}` `{{Diff\|page\|prev\|oldid\|label}}`	Diff between a numbered version and the previous version This is the form that would be used most often. The diff= parameter (parameter number 2) should be the word prev. The oldid= parameter (parameter number 3) should be the known revision number.
`{{Diff\|Foobar\|616706711\|616706707\|Diff between two numbered versions of a page}}` `{{Diff\|page title\|diff\|oldid\|label}}`	Diff between two numbered versions of a page The title= parameter (parameter number 1) should be a name of a page, for instance Foobar. The diff= parameter (parameter number 2) should be the larger revision number. The oldid= parameter (parameter number 3) should be the smaller revision number.
`{{Diff\|\|616706711\|616706707\|Diff between two numbered versions of a page without title parameter}}` `{{Diff\|\|diff\|oldid\|label}}`	Diff between two numbered versions of a page without title parameter The title= parameter (parameter number 1) may be left blank, thereby leaving a double pipe. The diff= parameter (parameter number 2) should be the larger revision number. The oldid= parameter (parameter number 3) should be the smaller revision number.
`{{Diff\|Wikipedia:Pagediff\|204934693\|204901573\|Diff between two numbered versions of a page in Wikipedia namespace}}` `{{Diff\|page\|diff\|oldid\|label}}`	Diff between two numbered versions of a page in Wikipedia namespace The title= parameter (parameter number 1) should be a name of a page, for instance Wikipedia:Pagediff. The diff= parameter (parameter number 2) should be the page revision to appear on the right (proposed change). The oldid= parameter (parameter number 3) should be the page revision to appear on the left (original).
`{{Diff\|Main Page\|next\|204901573\|Diff between a numbered version and the subsequent version}}` `{{Diff\|page\|next\|oldid\|label}}`	Diff between a numbered version and the subsequent version The diff= parameter (parameter number 2) should be the word next. The oldid= parameter (parameter number 3) should be the known revision number.
`{{Diff\|Main Page\|cur\|204901573\|Diff between a numbered version and the current version of a page}}` `{{Diff\|page\|cur\|oldid\|label}}`	Diff between a numbered version and the current version of a page The diff= parameter (parameter number 2) should be the word cur. The oldid= parameter (parameter number 3) should be the known revision number.
`{{Diff\|Main Page\|cur\|\|Diff showing the most recent change to a page}}` `{{Diff\|page\|cur\|\|label}}`	Diff showing the most recent change to a page The diff= parameter (parameter number 2) should be the word cur. The oldid= parameter (parameter number 3) should be empty.
`{{Diff\|Main Page\|\|204901573\|A link to a numbered version of a page}}` `{{Diff\|page\|\|oldid\|label}}`	A link to a numbered version of a page The diff= parameter (parameter number 2) should be empty. The oldid= parameter (parameter number 3) should be the known revision number. The result is not actually a diff, so this might be considered misuse of the template. See the {{oldid}} template.
`{{Diff\|Main Page\|204901573\|202506579\|Comparison display without page display of two numbered versions of a page \|diffonly=yes}}` `{{Diff\|page\|diff\|oldid\|label\|diffonly=yes}}`	Comparison display without page display of two numbered versions of a page The title= parameter (parameter number 1) should be a name of a page, for instance Main Page. The diff= parameter (parameter number 2) should be the larger revision number. The oldid= parameter (parameter number 3) should be the smaller revision number. The diffonly= parameter, which must include the parameter name, can only be set to `yes`

TemplateData

This is the TemplateData for this template used by TemplateWizard, VisualEditor and other tools. See a monthly parameter usage report for Template:Diff in articles based on its TemplateData.

TemplateData for Diff

A template that 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.

Template parameters[Edit template data]
Parameter		Description	Type	Status
title	`title` `page` `1`	The title of the page.	Page name	optional
Diff	`diff` `2`	The ID or keyword that is used against the base ID. Possible keywords are: cur – compare with the current version of a page. prev – compare with the previous version of a page. next – compare with the next version of a page. <var>id</var> – compare against this revision ID; should be <em>larger</em> than <code>oldid</code>.	Line	required
Oldid	`oldid` `3`	The base ID onto which the diff is generated. Some number like "442212827" (without the quotes).	Number	optional
Label	`label` `4`	Text to display as link. No label will give a numbered link.	Line	optional
Diffonly	`diffonly`	Displays the page comparisons only. If you use this, the value should be "yes" (without the quotes).	Line	optional

THC Science

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Usage

Helper subtemplate

Examples

TemplateData

See also

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