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Text Diff

This lesson is part of Web Developer Tools · All levels

Summary

Text diff compares two versions of text and marks the lines or characters that have been added, deleted, or changed. This tool is especially helpful when reviewing changes in code, configuration, or script before publishing. Some settings like ignoring spaces make comparisons more focused on meaningful change.

Key points

Diff displays the difference between the old version and the new version
The minus-marked line is deleted, the plus-marked line is added
Unified diff format includes the context around the change
The whitespace option helps to ignore the difference in the indentation
Always review the diff before commit or merge so that changes are not unexpected

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