cssnano/cssnano

Can't discard duplicate rules

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#86 opened on Nov 2, 2015

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enhancementhelp wanted

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Description

code: body { padding: 50px; }

body { padding: 0; }

results: body{padding:50px;padding:0}

What can I do to get the results as: body {padding:0}

Contributor guide

Research direction
Investigate the CSS minification logic in the codebase, specifically how duplicate selectors and rules are merged. Look at the rule merging or deduplication functions and trace why the first rule is not being dropped when identical selectors exist.
Tech stack
css
Domain
build systemtooling
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
CSSPostCSS
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60