# styled-components vs Emotion: source lines of code compared

The styled-components vs Emotion comparison on OctoCounts shows side-by-side source line counts for styled-components/styled-components and emotion-js/emotion, counted with the same engine and analysis options on the dates shown in the methodology line: files, total lines, code lines, comment lines, blank lines, and per-language totals, pinned to the exact commits listed below.

As of 2026-09-16, styled-components/styled-components contains 140,107 total lines (118,273 code) across 487 files, while emotion-js/emotion contains 27,132 total lines (15,960 code) across 427 files as of 2026-09-16. styled-components/styled-components is about 7.4x the size of emotion-js/emotion by code lines. Code size is not code quality: a larger count only means more source material, not a better or worse project.

| Metric | [styled-components/styled-components](https://octocounts.com/github/styled-components/styled-components) | [emotion-js/emotion](https://octocounts.com/github/emotion-js/emotion) |
| --- | ---: | ---: |
| Files | 487 | 427 |
| Total lines | 140,107 | 27,132 |
| Code lines | 118,273 | 15,960 |
| Comment lines | 12,739 | 6,354 |
| Blank lines | 9,095 | 4,818 |
| Languages counted | 12 | 10 |

Top languages in styled-components/styled-components: JSON (42.9% of code), TypeScript (25.3% of code), TSX (16.4% of code). Top languages in emotion-js/emotion: JavaScript (33.3% of code), TypeScript (31.1% of code), TSX (17.8% of code). JSON, TypeScript, TSX, JavaScript appear in both top language lists; YAML appears only in styled-components/styled-components's top languages; HTML appears only in emotion-js/emotion's top languages.

Methodology: both counts come from cached OctoCounts reports generated with tokei. styled-components/styled-components was counted at ref 38b2e164ee8cff33ea76b92c17e8da550644ab5b (commit 38b2e164ee8c) on 2026-09-16; emotion-js/emotion was counted at ref cce67ec6b2fc94261028b4f4778aae8c3d6c5fd6 (commit cce67ec6b2fc) on 2026-09-16. See the [counting methodology](https://octocounts.com/docs/methodology) for ignored directories and analysis options.
## About this comparison

styled-components/styled-components counts the styled-components repository: the CSS-in-JS library, its React bindings, tooling, and tests. emotion-js/emotion counts the Emotion repository — a monorepo of CSS-in-JS packages, their tooling, and tests. Both are library-scoped TypeScript/JavaScript trees of similar purpose, counted with the same engine on the dates in the methodology line.

The per-language tables of both reports are dominated by TypeScript and JavaScript with only small tooling shares, so for both libraries the totals sit close to the actual library source — few unrelated languages inflate either count.

Both repositories carry their test and fixture material in-tree, meaning a visible share of each count exists to verify style-generation behavior across browsers and frameworks rather than to ship.

_Library repository size is not bundle size: bundlers include only the entry points an application imports, so these totals overstate what a given app would ship and cannot be compared as delivered-weight numbers._

Sources: [styled-components/styled-components repository](https://github.com/styled-components/styled-components) · [emotion-js/emotion repository (CSS-in-JS monorepo)](https://github.com/emotion-js/emotion). Statements verified 2026-09-16.

Evidence and next steps:

- [styled-components/styled-components SLOC report](https://octocounts.com/github/styled-components/styled-components)
- [emotion-js/emotion SLOC report](https://octocounts.com/github/emotion-js/emotion)
- [Compare styled-components/styled-components and emotion-js/emotion interactively](https://octocounts.com/compare?left=https%3A%2F%2Fgithub.com%2Fstyled-components%2Fstyled-components&right=https%3A%2F%2Fgithub.com%2Femotion-js%2Femotion)

Note: code size is not code quality. OctoCounts only reports reproducible line counts and makes no claim that either project is better.

## Compare FAQ

### Which has more lines of code, styled-components/styled-components or emotion-js/emotion?

styled-components/styled-components has more code: 118,273 code lines versus 15,960 for emotion-js/emotion, about 7.4x as much, based on cached OctoCounts reports as of 2026-09-16.

### Does more source lines of code mean more complexity?

Not necessarily. SLOC measures size, not complexity, quality, or maintainability. A larger codebase can mean more features, more generated or vendored code, more verbose language idioms, or more tests — none of which imply the code is harder to work with. Use SLOC to gauge the scale of what you'd be reading or maintaining, not as a quality signal for styled-components/styled-components, emotion-js/emotion, or any repository.

### How is this comparison calculated?

Methodology: both counts come from cached OctoCounts reports generated with tokei. styled-components/styled-components was counted at ref 38b2e164ee8cff33ea76b92c17e8da550644ab5b (commit 38b2e164ee8c) on 2026-09-16; emotion-js/emotion was counted at ref cce67ec6b2fc94261028b4f4778aae8c3d6c5fd6 (commit cce67ec6b2fc) on 2026-09-16. See the counting methodology for ignored directories and analysis options.

### Can I compare a different branch, tag, or commit?

Yes. This page shows the default branch for each repository. Use the interactive comparison tool to pick any public GitHub repository, branch, tag, or commit SHA for both sides and get a fresh side-by-side report.

## Related OctoCounts pages

- [Interactive repository comparison](https://octocounts.com/compare)
- [Recently analyzed repositories](https://octocounts.com/recent)
- [Popular SLOC reports](https://octocounts.com/popular)
- [Trending GitHub repositories](https://octocounts.com/trending)
- [Hall of Monoliths](https://octocounts.com/hall-of-monoliths)
- [Original research: how filtering changes SLOC counts](https://octocounts.com/research)
- [GitHub SLOC counter guide](https://octocounts.com/docs/github-sloc-counter)
- [Counting methodology](https://octocounts.com/docs/methodology)
- [SLOC and code metrics glossary](https://octocounts.com/docs/glossary)
- [OctoCounts API docs](https://octocounts.com/docs/api)