strings.Diff

Returns an anchored diff of the two given texts in the unified diff format.

Syntax: strings.Diff OLDNAME OLD NEWNAME NEW
Returns: string

Usage

The strings.Diff function returns an anchored diff of the two texts OLD and NEW in the unified diff format, using OLDNAME and NEWNAME as the labels in the diff header. If OLD and NEW are identical, the function returns an empty string.

Examples

{{ $want := `
<p>The product of 6 and 7 is 42.</p>
<p>The product of 7 and 6 is 42.</p>
` }}

{{ $got := `
<p>The product of 6 and 7 is 42.</p>
<p>The product of 7 and 6 is 13.</p>
` }}

{{ $diff := strings.Diff "want" $want "got" $got }}
{{ transform.Highlight $diff "diff" }}

The rendered output:

Last updated: October 28, 2026 : content: Apply style guide to strings functions (d6de31ebd)

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