Changelog

October 22, 2025 ยท View on GitHub

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

7.9.0 - 2025-10-21

Features

  • add languageNames prop to HighlightAuto to allow a subset of languages
  • update languageName in LangTag to use LanguageName utility type
  • export LanguageName utility type

7.8.4 - 2025-08-31

Fixes

  • export LanguageType utility type

7.8.3 - 2025-04-01

Fixes

  • remove @ts-check comments

7.8.2 - 2024-12-27

Fixes

  • update docs on pnpm usage

7.8.1 - 2024-12-25

Fixes

  • upgrade highlight.js to version 11.11.1

7.8.0 - 2024-12-15

Features

  • upgrade highlight.js to version 11.11.0

Fixes

  • optimize preprocessed CSS StyleSheets

7.7.0 - 2024-07-15

Features

  • upgrade highlight.js to version 11.10.0

7.6.1 - 2024-05-15

Fixes

  • avoid self-closing tag in LineNumbers to address Svelte 5 warning

7.6.0 - 2024-02-05

Features

  • add --langtag-top, --langtag-right style props

7.5.0 - 2024-02-01

Features

  • add --langtag-padding style prop

7.4.8 - 2024-01-04

Fixes

  • add missing exports to allow importing from svelte-highlight/styles and svelte-highlight/languages

7.4.7 - 2023-12-28

Fixes

  • use declare const for languages and styles type definitions

7.4.6 - 2023-12-16

Fixes

  • fix ./*.svelte mapping; use import specifier instead of svelte

7.4.5 - 2023-12-16

Fixes

  • map ./*.svelte files correctly in package.json exports

7.4.4 - 2023-12-16

Fixes

  • add types to exports map in package.json
  • optimize generated CSS using cssnano

7.4.3 - 2023-12-16

Fixes

  • add svelte entry point to exports map in package.json to address Vite development warning

7.4.2 - 2023-11-25

Fixes

7.4.1 - 2023-10-13

Fixes

  • Re-publish package after correctly building it

7.4.0 - 2023-10-13

Features

  • upgrade highlight.js to version 11.9.0

7.3.0 - 2023-05-13

Features

  • upgrade highlight.js to version 11.8.0

7.2.1 - 2023-04-01

Fixes

  • line numbers should not be covered by a solid fill, custom line background color
  • line numbers column should not be covered by code if scrollable

7.2.0 - 2023-02-14

Features

  • support highlighted lines in LineNumbers through the highlightedLines prop

7.1.2 - 2023-01-01

Fixes

  • correctly set top/bottom padding in LineNumbers if code is updated

7.1.1 - 2022-12-31

Fixes

  • republish package

7.1.0 - 2022-12-31

Features

  • add startingLineNumber prop to LineNumbers

7.0.1 - 2022-12-30

Fixes

  • reset table styles in LineNumbers

7.0.0 - 2022-12-30

Breaking Changes

  • rename langtag style props
    • --hljs-background -> --langtag-background
    • --hljs-foreground -> --langtag-color
    • --hljs-radius -> --langtag-border-radius
  • mark code, language as required props

Features

  • include inferred language in on:highlight event detail in HighlightAuto
  • add LineNumbers component to support rendering line numbers
  • upgrade highlight.js to version 11.7.0

Fixes

  • use HTMLAttributes from svelte/elements to correctly type $$restProps

6.2.1 - 2022-08-07

Fixes

  • generate types for svelte-highlight/languages/*, svelte-highlight/styles/*

Documentation

  • add dynamic import example
  • document CDN styles usage
  • use TypeScript in all example set-ups
  • remove Snowpack example as it is no longer maintained
  • update set-up instructions for SvelteKit/Vite

6.2.0 - 2022-07-13

Features

  • upgrade highlight.js to version 11.6.0 (net +2 styles)

6.1.1 - 2022-07-02

Fixes

  • remove language prop type from HighlightAuto TypeScript definitions

6.1.1 - 2022-06-27

Refactor

  • remove unnecessary language null check when setting data-language attribute
  • reduce .langtag CSS specificity

6.1.0 - 2022-06-10

Features

  • port Svelte components to TypeScript

Documentation

  • fix prop table types and default values

6.0.1 - 2022-03-26

Fixes

  • update generated SUPPORTED_LANGUAGES.md and SUPPORTED_STYLES.md

6.0.0 - 2022-03-26

Breaking Changes

  • use SvelteKit to package the library and auto-generate TypeScript definitions
    • styles are moved from src/styles to styles
    • languages are moved from src/languages to languages

5.3.2 - 2022-03-16

  • specify in docs that Vite should optimize both "highlight.js" and "highlight.js/lib/core" if using SvelteKit or Vite

5.3.1 - 2022-03-16

  • use default highlight.js library for HighlightAuto

5.3.0 - 2022-03-12

  • upgrade highlight.js to version 11.5.0 (net +1 language, +3 styles)

5.2.2 - 2022-02-25

  • use default export from highlight.js/lib/core.js

5.2.1 - 2022-02-11

  • remove whitespace from pretags because Svelte v3.46.4 now preservespre whitespace

5.2.0 - 2022-01-06

  • upgrade highlight.js to version 11.4.0 (net +1 style)

5.1.4 - 2021-12-18

  • recommend installing highlight.js as a dependency for pnpm users

5.1.3 - 2021-11-13

  • patch highlight.js to version 11.3.1

5.1.2 - 2021-10-19

Fixes

  • move TypeScript definitions components to the src/ folder

5.1.1 - 2021-10-19

Fixes

  • emit TypeScript definitions for languages and styles to the src/ folder

5.1.0 - 2021-10-17

Features

  • upgrade highlight.js to v11.3.0

5.0.0 - 2021-10-08

Breaking Changes

  • use .svelte.d.ts extension for TypeScript definitions

4.0.0 - 2021-09-16

Breaking Changes

  • move .hljs class from pre element to code to align with the intended usage of highlight.js
  • change padding of pre.langtag::after to 1em to prevent overpadding

3.4.0 - 2021-09-12

Features

  • add data-language attribute to pre element to allow targeted styling
  • add langtag prop that displays the highlighted language if enabled

3.3.0 - 2021-09-01

Features

  • include named language export in src/languages/* files

3.2.1 - 2021-09-01

Documentation

  • update link to live demo

3.2.0 - 2021-08-02

Features

  • upgrade highlight.js to v11.2.0

3.1.0 - 2021-07-08

Features

  • upgrade highlight.js to v11.1.0

3.0.0 - 2021-05-30

Breaking Changes

  • github-gist style removed from highlight.js

Features

  • upgrade highlight.js to v11.0.0
    • +2 styles (github-dark, github-dark-dimmed)

2.1.0 - 2021-05-21

Features

  • upgrade highlight.js to v11.0.0-beta1
    • +1 language (wren)
    • +1 style (colors)

2.0.0 - 2021-04-30

Breaking Changes

  • upgrade highlight.js to the next major version (v11), which supports ESM
    • removed languages: c-like, htmlbars, sql_more

Features

  • added languages: nestedtext, wasm
  • 143 new styles

2.0.0-rc.1 - 2021-04-30

Fixes

  • omit .js extension when importing highlight.js language
  • sort types/styles/index.d.ts by name

2.0.0-rc.0 - 2021-04-30

Breaking Changes

  • upgrade highlight.js to the next major version (v11), which supports ESM
    • removed languages: c-like, htmlbars, sql_more

Features

  • added languages: nestedtext, wasm
  • 143 new styles

1.0.1 - 2021-04-23

Fixes

  • fix typos in README.md

1.0.0 - 2021-04-23

Breaking Changes

  • upgrade highlight.js to version 10.7
  • remove all forwarded events from Highlight, HighlightSvelte
  • remove legacy component; replace with Highlight.svelte as the default export
  • remove Rollup from build process; only ship Svelte source code and languages/styles as ESM
  • remove highlightjs-svelte dependency; use XML/JavaScript/CSS as sublanguages

Features

  • add HighlightAuto component that auto highlights code
  • major bundle size improvements by using only the core library

Fixes

  • correctly type languages/styles

Other

  • drop Node.js v12 from Travis CI build config

Documentation

  • use SvelteKit instead of Sapper for the documentation/live demo site
  • provide correct NPM install command

0.7.1 - 2021-02-13

Fixes

  • include types folder in published files

0.7.0 - 2021-02-13

Features

  • include highlighted markup in dispatched event detail
  • add TypeScript definitions

Fixes

  • mark CSS styles as side effects

0.6.2 - 2020-05-10

  • Fix "language is undefined" error by falling back to unhighlighted code

0.6.1 - 2020-05-10

  • Refactor build process to reduce bundled package size

0.6.0 - 2020-05-03

  • Export new Highlight, HighlightSvelte components; maintain backwards compatibility with Legacy component

  • Require svelte^3.20.x as a peer dependency due to usage of the $$restProps API

  • Support Svelte syntax highlighting by wrapping highlightjs-svelte

  • Dispatch highlight event

  • Forward the following events to the pre element (on:click, on:mouseover, on:mouseenter, on:mouseleave, on:focus, on:blur)

0.5.0 - 2020-03-27

  • Add editable support by exporting contenteditable, spellcheck props (#105)

0.4.1 - 2020-02-01

  • Bump highlight.js version from 9.17.1 to 9.18.1

0.4.0 - 2019-12-18

  • Pass id, style, class props to pre element (#48)

  • Deprecate darkula style (#49)

0.3.5 - 2019-12-14

  • Use gh-pages to publish demo

  • Move documentation for supported languages, styles to docs folder

0.3.4 - 2019-12-14

  • Bump highlight.js from 9.17.0 to 9.17.1

0.3.3 - 2019-12-12

  • Use consistent terminology when documenting usage

  • Add version number to demo

0.3.2 - 2019-12-12

  • Upgrade highlight.js to v9.17.0

0.3.1 - 2019-12-11

  • Move src/docs folder to demo (#36)

  • Document custom language highlighting in README (#35)

0.3.0 - 2019-11-18

  • Add code prop for dynamically updating code

0.2.2 - 2019-11-17

  • Add new live demo and remove storybook

0.2.1 - 2019-11-15

  • Document supported languages, styles

0.2.0 - 2019-11-10

  • Export highlight.js theme CSS files as JavaScript

0.1.1 - 2019-11-09

  • Fix broken svelte import by publishing src folder

0.1.0 - 2019-11-09

  • Initial release