CSS Code Quality calculator

This package analyzes your CSS on a high level and comes up with a score, divided into three areas:

• Maintainability: how difficult is it for someone looking at the CSS from a high level to find the exact spot to fix a bug?
• Complexity: how difficult is it for someone to make a change and be confident that they can make that change without side effects?
• Performance: How likely is the CSS to have a negative impact on performance, based on high-level metrics? (Not including using hardware accelerated transforms and the like, because other tools are more suited for that.)

Installation

npm install @projectwallace/css-code-quality

Usage

import { calculate } from "@projectwallace/css-code-quality";

let css = `my_css { /* ... */ }`;
let result = calculate(css);

/*
The result shape looks something like this:

{
  "violations": [ ],
  "passes": [ ],
  "performance": {
    "score": 90,
    "violations": [ ],
    "passes": [ ]
  },
  "maintainability": {
    "score": 100,
    "violations": [ ],
    "passes": [ ]
  },
  "complexity": {
    "score": 97,
    "violations": [ ],
    "passes": [ ]
  }
}

Each `passes` or `violations` array contains an object that looks like this:

{
  "id": "EmptyRules",
  "score": 0,
  "value": 0
},
{
  "id": "AverageSelectorsPerRule",
  "score": 0,
  "value": 1.5,
  "actuals": [
    2,
    1
  ]
}

etc. etc.

*/

Related projects

• CSS Analyzer - A CSS Analyzer that goes through your CSS to find all kinds of relevant statistics.
• Wallace CLI - CLI tool for @projectwallace/css-analyzer
• Constyble - CSS Complexity linter
• Color Sorter - Sort CSS colors by hue, saturation, lightness and opacity