v0.9.1

Parser

• Support Action View tag helpers with inline blocks by @marcoroth in #1404
• Fix Action View Helpers with positional arguments and block by @marcoroth in #1406

Engine

• Make sure validate_ruby also works on older Rubies by @marcoroth in #1411
• Delegate add_expression_block for Erubi compatibility by @marcoroth in #1417

Linter

• Warn about j() in erb-no-unsafe-script-interpolation by @marcoroth in #1407
• Allow more types for html-allowed-script-type rule by @marcoroth in #1413
• Support more cases for erb-no-duplicate-branch-elements by @marcoroth in #1415
• Re-export linter rule utils from core by @marcoroth in #1416

Linter Rules

New Rules

• Implement actionview-no-silent-render rule by @marcoroth in #1402
• Implement erb-no-silent-statement rule by @marcoroth in #1403
• Implement erb-no-empty-control-flow rule by @marcoroth in #1412

VS Code / Cursor

• Don't register Toggle Comment as global shortcut by @marcoroth in #1409

Dependencies

• Bump undici from 7.18.2 to 7.24.1 by @dependabot in #1378
• Bump nx from 22.4.4 to 22.5.4 by @dependabot in #1397
• Bump @rollup/plugin-commonjs from 29.0.0 to 29.0.2 by @dependabot in #1398
• Bump @types/vscode from 1.109.0 to 1.110.0 by @dependabot in #1399

Commits

Full Changelog: v0.9.0...v0.9.1

v0.9.0

Herb v0.9

Check out the "What's new in Herb v0.9" post on the Herb Blog.

Core

• Fix TS2304: Cannot find name 'TextDecoder' error by @marcoroth in #1175
• Types: Add discriminated union support across language bindings by @marcoroth in #1154
• Implement lex_file and parse_file in language bindings by @marcoroth in #1325
• Expose Herb.parse_puby to parse Ruby with Prism by @marcoroth in #1353

Parser

• Fix ERB control flow tags in attribute positions by @marcoroth in #873
• Add analyze option to parser_options_T by @citizen428 in #1144
• Introduce HTMLConditionalElementNode by @marcoroth in #1146
• Make parser_options parameter const in herb_parse by @citizen428 in #1151
• Introduce HTMLConditionalOpenTagNode by @marcoroth in #1153
• Handle invalid HTML comment closing tag --!> by @marcoroth in #1156
• Improve error recovery for unclosed open tags and unterminated quotes by @marcoroth in #1169
• Add strict option to parser_options by @marcoroth in #1171
• Improve error recovery for ERB tags by @marcoroth in #1170
• Introduce HTMLOmittedCloseTagNode and OmittedClosingTagError by @marcoroth in #1173
• Introduce MissingAttributeValueError for empty attribute values by @marcoroth in #1182
• Mention strict: false in OmittedClosingTagError message by @marcoroth in #1189
• Don't treat backslash as escape character in attribute values by @marcoroth in #1213
• Fix regressions in analyzing conditional open tags by @marcoroth in #1208
• Store parser options on ParseResult by @marcoroth in #1190
• Introduce UnclosedCloseTagError by @marcoroth in #1216
• Improve ERB case node and end tag matching by @marcoroth in #1237
• Fix ConditionalElementMultipleTagsError on valid templates by @marcoroth in #1240
• Fix lambda block detection by @marcoroth in #1250
• Introduce StrayERBClosingTagError by @marcoroth in #1256
• Friendly token names in Unexpected Token error messages by @marcoroth in #194
• Allow inline case/when and case/in in strict mode by @marcoroth in #1263
• Rename source to element_source for HTMLElementNode by @marcoroth in #1331
• Analyze and transform Action View helpers by @marcoroth in #1347
• Expose Prism Nodes in Herb Syntax Tree by @marcoroth in #1350
• Detect turbo_frame_tag helper by @marcoroth in #1354

Engine

• Turn on strict by default by @marcoroth in #1184
• Fix ERB expression compilation when code contains a heredoc by @pinzonjulian in #1206
• Ensure Engine produces valid Ruby in test suite by @marcoroth in #1207
• Ensure assert_evaluated_snapshot produces valid Ruby in tests by @marcoroth in #1209
• Fix newline handling after heredoc terminators by @marcoroth in #1246
• Add support for disabling debug spans in ERBBlockNode via comments by @kozy4324 in #977
• <%= -%> does not trim trailing newline by @joelhawksley in #1361
• Inline comments on <% end %> on output blocks produce invalid Ruby by @joelhawksley in #1363
• Whitespace stripped between HTML closing tag and ERB control tag by @joelhawksley in #1366

Formatter

• Make sure herb-format respects .herb.yml by @marcoroth in #1185
• Don't collapse multiple ERB expressions in block elements by @marcoroth in #1214
• Add expectFormattedToMatch test helper by @marcoroth in #1215
• Fix infinite loop when rendering multiple groups of adjacent inline elements by @ydah in #1008
• Fix ERB text flow formatting to keep adjacent inline elements together by @ydah in #1010
• Fix punctuation separating from ERB tags in mixed content by @marcoroth in #1266
• Extract Text Flow Engine by @marcoroth in #1267
• Extract Attribute Renderer by @marcoroth in #1269
• Extract Spacing Analyzer and Comment Helpers by @marcoroth in #1270
• Fix adjacent ERB tags in ERB block by @marcoroth in #1278
• Preserve user newlines in block elements with mixed content by @marcoroth in #1279
• Preserve content in white-space significant elements by @marcoroth in #1280
• Refactor Format Printer using withInlineMode by @marcoroth in #1285
• Preserve user newlines for block elements with ERB children by @marcoroth in #1295
• Preserve user newlines for inline elements by @marcoroth in #1305

Linter

• Fix html-no-empty-headings to detect non-output ERB by @marcoroth in #1162
• Update html-anchor-require-href with erblint-github insights by @marcoroth in #1228
• Link Linter rule IDs to docs in CLI output by @marcoroth in #1241
• Improve colors in Linter CLI output by @marcoroth in #1242
• Link file paths in Linter CLI output by @marcoroth in #1243
• Make RuleClass().name static by @citizen428 in #1268
• Fix false positive for dynamic IDs across separate ERB blocks by @marcoroth in #1299
• Access rule type from class instead of instance by @marcoroth in #1298
• Accessibility rules should be warnings, not errors by @joelhawksley in #1066
• Improve html-img-require-alt rule by @marcoroth in #1311
• Move path to CLI-only bundle by @marcoroth in #1352
• Make html-anchor-require-href Action View Helper aware by @marcoroth in #1367
• CLI: Implement a Linter Worker to parallelize file processing by @marcoroth in #1371

Linter Rules

New Rules

• Implement erb-no-conditional-html-element rule by @marcoroth in #1150
• Implement html-no-aria-hidden-on-body rule by @marcoroth in #1163
• Implement html-no-abstract-roles rule by @marcoroth in #1164
• Implement erb-no-trailing-whitespace rule by @markokajzer in #1168
• Implement erb-no-conditional-open-tag rule by @markokajzer in #1200
• Implement html-allowed-script-type rule by @markokajzer in #1201
• Implement html-require-closing-tags rule by @markokajzer in #1199
• Implement turbo-permanent-require-id rule by @pardeyke in #1229
• Implement erb-no-inline-case-conditions rule by @marcoroth in #1265
• Implement erb-no-interpolated-class-names rule by @marcoroth in #1283
• Implement erb-no-duplicate-branch-elements rule by @marcoroth in #1301
• Implement erb-no-then-in-control-flow rule by @marcoroth in #1309
• Implement erb-no-statement-in-script rule by @marcoroth in #1330
• Implement erb-no-javascript-tag-helper rule by @marcoroth in #1330
• Implement erb-no-unsafe-script-interpolation rule by @marcoroth in #1330
• Implement erb-no-raw-output-in-attribute-value rule by @marcoroth in #1330
• Implement erb-no-unsafe-raw rule by @marcoroth in #1330
• Implement erb-no-unsafe-js-attribute rule by @marcoroth in https://github.com/marcoroth/herb/pull/...

v0.8.10

Parser

• Upgrade Prism to v1.9.0 by @marcoroth in #1110
• Add error for case/when in same ERB tag by @tvararu in #1112

Engine

• Handle trailing comments in ERB output tags by @marcoroth in #1083
• Show component names in DebugVisitor by @marcoroth in #1132

Linter

• Allow nested parens in erb-strict-locals-comment-syntax rule by @marcoroth in #1141

Formatter

• Fix heredoc formatting by @citizen428 in #1142

Dev Tools

• Show colored outlines in Herb Debug Menu by @marcoroth in #1133

Language Server

• Don't add \n when formatting ranges by @marcoroth in #1126

libherb

• Mark certain targets as .PHONY in Makefile by @citizen428 in #1118
• Change LLVM detection on macOS by @citizen428 in #1123
• Add test for herb_read_file by @citizen428 in #1127
• Remove old visit subcommand by @citizen428 in #1129
• Add free calls to prism command by @citizen428 in #1128
• Add default language case in herb_extract by @citizen428 in #1131
• Introduce string_equals utility function by @citizen428 in #1130
• Simplify main.c by @citizen428 in #1134
• Add support for .envrc.local by @citizen428 in #1120

Dependencies

• Bump @typescript-eslint/parser from 8.53.1 to 8.54.0 by @dependabot[bot] in #1104
• Bump zod from 4.3.5 to 4.3.6 by @dependabot[bot] in #1105
• Bump playwright from 1.57.0 to 1.58.0 by @dependabot[bot] in #1103
• Bump @typescript-eslint/eslint-plugin from 8.53.1 to 8.54.0 by @dependabot[bot] in #1106
• Bump @shikijs/vitepress-twoslash from 3.21.0 to 3.22.0 by @dependabot[bot] in #1117
• Bump nx from 22.3.3 to 22.4.4 by @dependabot[bot] in #1116
• Bump rollup from 4.55.2 to 4.57.1 by @dependabot[bot] in #1115
• Bump playwright from 1.58.0 to 1.58.1 by @dependabot[bot] in #1114
• Bump vitepress from 2.0.0-alpha.15 to 2.0.0-alpha.16 by @dependabot[bot] in #1113
• Bump @types/vscode from 1.108.1 to 1.109.0 by @dependabot[bot] in #1138
• Bump prettier from 3.8.0 to 3.8.1 by @dependabot[bot] in #1140
• Bump @types/node from 25.0.10 to 25.2.2 by @dependabot[bot] in #1137
• Bump oxlint from 1.39.0 to 1.43.0 by @dependabot[bot] in #1136
• Bump eslint from 9.39.2 to 10.0.0 in /javascript/packages/vscode by @dependabot[bot] in #1135
• Bump @typescript-eslint/eslint-plugin from 8.54.0 to 8.55.0 by @dependabot[bot] in #1139

New Contributors

• @citizen428 made their first contribution in #1120
• @tvararu made their first contribution in #1112

Commits

Full Changelog: v0.8.9...v0.8.10

v0.8.9

Parser

• Fix next within if in single ERB tag by @marcoroth in #1100

Linter

• Catch <%# locals:() %> in erb-strict-locals-comment-syntax by @marcoroth in #1087

Playground

• Add option for Formatter maxLineLength by @marcoroth in #1101

Dependencies

• Bump rollup from 4.55.1 to 4.55.2 by @dependabot[bot] in #1091
• Bump prettier from 3.7.4 to 3.8.0 by @dependabot[bot] in #1089
• Bump vitepress-plugin-group-icons from 1.6.5 to 1.7.1 by @dependabot[bot] in #1092
• Bump @typescript-eslint/parser from 8.53.0 to 8.53.1 by @dependabot[bot] in #1090
• Bump @typescript-eslint/eslint-plugin from 8.51.0 to 8.53.1 by @dependabot[bot] in #1093
• Bump lodash-es from 4.17.21 to 4.17.23 in the npm_and_yarn group across 1 directory by @dependabot[bot] in #1097
• Bump lodash from 4.17.21 to 4.17.23 in the npm_and_yarn group across 1 directory by @dependabot[bot] in #1098
• Bump @types/node from 25.0.3 to 25.0.10 by @dependabot[bot] in #1107

Commits

Full Changelog: v0.8.8...v0.8.9

v0.8.8

Linter

• Add support for --fix-unsafely flag by @marcoroth in #1072
• Allow empty headings in template for html-no-empty-headings by @marcoroth in #1073
• Fix tinyglobby migration issues in linter CLI by @marcoroth in #1074
• Allow style inside svg for html-head-only-elements by @marcoroth in #1082

New Linter Rules

• Implement erb-strict-locals-comment-syntax rule to enforce Rails strict locals comment syntax by @ydah in #1049
• Implement erb-strict-locals-required rule by @marcoroth in #1070

Formatter

• Preserve Unicode whitespace when formatting by @marcoroth in #1080

Language Server

• Fix case with then being marked as unnecessary by @marcoroth in #1079

Ruby gem

• Improve native extension loading for preview versions by @marcoroth in #1081

Engine

• Exclude SVG and MathML contexts from DebugVisitor by @marcoroth in #1084

Visual Studio Code Extension

• Fix bundling of fdir in CJS context by @marcoroth in #1071

Parser

• Prioritize blocks over yield in control flow detection by @marcoroth in #1076
• Add then_keyword for if, unless, when and in by @marcoroth in #1078
• Upgrade Prism to v1.8.0 by @marcoroth in #1067

libherb (WebAssembly)

• Build Optimizations by @marcoroth in #1075

Dependencies

• Bump oxlint from 1.37.0 to 1.39.0 by @dependabot[bot] in #1055
• Bump @shikijs/vitepress-twoslash from 3.20.0 to 3.21.0 by @dependabot[bot] in #1054
• Bump vite from 7.3.0 to 7.3.1 by @dependabot[bot] in #1053
• Bump @typescript-eslint/parser from 8.51.0 to 8.53.0 by @dependabot[bot] in #1057
• Bump undici from 7.15.0 to 7.18.2 in the npm_and_yarn group across 1 directory by @dependabot[bot] in #1062
• Bump @types/vscode from 1.107.0 to 1.108.1 by @dependabot[bot] in #1056

Commits

Full Changelog: v0.8.7...v0.8.8

v0.8.7

Linter

• Improve html-no-duplicate-attributes linter rule to respect ERB Control Flow by @kudoas in #1014
• Add --fail-level option to control exit code by @ydah in #1007

Dev Tools

• Ensure Herb overlay label is visible in overflow-clipped elements by @kozy4324 in #1013

libherb

• Revert lazy array initialization and restore hb_array_size() usage by @marcoroth in #1025

Ruby

• Upgrade to Ruby 4 and rake-compiler-dock to v1.11.1 by @marcoroth in #1012
• Add irb to Gemfile by @kozy4324 in #1035
• Fix test failure caused by year change by @kozy4324 in #1031

JavaScript

• Use tinyglobby and picomatch by @marcoroth in #843
• Bump js-yaml, jws, and mdast-util-to-hast by @dependabot[bot] in #1028
• Upgrade NPM dependencies by @marcoroth in #1029

WASM

• Upgrade to C++17 for Embind compatibility by @marcoroth in #1026

Dependencies

• Bump rollup from 4.53.3 to 4.54.0 by @dependabot[bot] in #1019
• Bump express and @types/express by @dependabot[bot] in #1022
• Bump @typescript-eslint/parser from 8.41.0 to 8.50.1 by @dependabot[bot] in #1020
• Bump @types/vscode from 1.106.0 to 1.107.0 by @dependabot[bot] in #1021
• Bump qs from 6.14.0 to 6.14.1 in the npm_and_yarn group across 1 directory by @dependabot[bot] in #1032
• Bump oxlint from 1.36.0 to 1.37.0 by @dependabot[bot] in #1042
• Bump rollup from 4.54.0 to 4.55.1 by @dependabot[bot] in #1039
• Bump @types/picomatch from 3.0.2 to 4.0.2 in /javascript/packages/config by @dependabot[bot] in #1038
• Bump @types/picomatch from 3.0.2 to 4.0.2 by @dependabot[bot] in #1040
• Bump @types/node from 20.19.27 to 25.0.3 by @dependabot[bot] in #1041
• Bump zod from 4.2.1 to 4.3.5 by @dependabot[bot] in #1043

Commits

Full Changelog: v0.8.6...v0.8.7

v0.8.6

Ruby

• Ruby v4.0 support by @marcoroth in #996

Parser

• Upgrade Prism to v1.7.0 by @marcoroth in #992
• Fix block detection to exclude closed brace blocks without yield by @ydah in #1009

Dev Tools

• Avoid overriding non-static position when attaching herb overlay by @kozy4324 in #999
• Ensure Herb overlay label is visible when attached to html element by @kozy4324 in #1000

libherb

• C: New hb_array implementation by @timkaechele in #782

Documentation

• Fix blog mp4 embeds with video tags by @kudoas in #994

Dependencies

• Upgrade rake-compiler-dock for Ruby v4.0 support by @marcoroth in #996
• Bump vitepress from 2.0.0-alpha.12 to 2.0.0-alpha.15 by @dependabot in #986
• Bump oxlint from 1.13.0 to 1.35.0 by @dependabot in #1006
• Bump @vscode/vsce from 3.6.0 to 3.7.1 by @dependabot in #1002
• Bump @shikijs/vitepress-twoslash from 3.15.0 to 3.20.0 by @dependabot in #1003
• Bump @mapbox/node-pre-gyp from 2.0.0 to 2.0.3 by @dependabot in #1004
• Bump nx from 22.1.3 to 22.3.3 by @dependabot in #1005

New Contributors

• @ydah made their first contribution in #1009

Commits

Full Changelog: v0.8.5...v0.8.6

v0.8.5

Lexer/Parser

• Add support for <%graphql %> tags by @marcoroth in #973
• HTML tags treat as case-insensitive by @kudoas in #968
• Introduce ERBMultipleBlocksInTagError by @marcoroth in #971
• Fix parsing < and > characters in text content by @marcoroth in #974

Linter

• Account for meta[media] in html-no-duplicate-meta-names rule by @marcoroth in #958
• Lowercase both opening/closing tag when fixing html-tag-name-lowercase offense by @kudoas in #976

Language Server

• Add Unnecessary diagnostics for all ERB nodes by @marcoroth in #947

Engine

• Ignore <%graphql %> tags when compiling templates by @marcoroth in #988

Documentation

• Fix file name in Linter Custom Rules example code by @kozy4324 in #966

Dependencies

• Bump esbuild from 0.27.0 to 0.27.1 by @dependabot[bot] in #962
• Bump yaml from 2.8.1 to 2.8.2 by @dependabot[bot] in #960
• Bump vitepress-plugin-group-icons from 1.6.3 to 1.6.5 by @dependabot[bot] in #961
• Bump tsup from 8.5.0 to 8.5.1 by @dependabot[bot] in #963
• Bump rollup from 4.53.2 to 4.53.3 by @dependabot[bot] in #959
• Bump vite from 7.1.11 to 7.3.0 by @dependabot[bot] in #982
• Bump @typescript-eslint/eslint-plugin from 8.48.0 to 8.49.0 by @dependabot[bot] in #985
• Bump prettier from 3.6.2 to 3.7.4 by @dependabot[bot] in #984
• Bump @types/node from 24.10.4 to 25.0.2 in /javascript/packages/tailwind-class-sorter by @dependabot[bot] in #979
• Bump rimraf from 6.1.0 to 6.1.2 by @dependabot[bot] in #983

New Contributors

• @kudoas made their first contribution in #968

Commits

Full Changelog: v0.8.4...v0.8.5

v0.8.4

Formatter

• Disable formatter in default config by @marcoroth in #944
• Keep herb:disable on same line as tag-opening by @marcoroth in #946

Linter

• Resolve custom rules from project root by @marcoroth in #945

Language Server

• Add Unnecessary diagnostic for <% case %> children by @marcoroth in #802

Engine

• Add more tests for left and right ERB Trimming by @marcoroth in #650
• Avoid applying debug spans inside javascript_tag blocks by @kozy4324 in #953

libherb

• C: Deprecate hb_array_size by @timkaechele in #885

Documentation

• Clean up references to old settings/configs by @marcoroth in #943

Dependencies

• Bump mdast-util-to-hast from 13.2.0 to 13.2.1 in the npm_and_yarn group across 1 directory by @dependabot[bot] in #940
• Bump @jothepro/doxygen-awesome-css from v2.3.4 to v2.4.1 by @dependabot[bot] in #924
• Bump jws from 3.2.2 to 3.2.3 in the npm_and_yarn group across 1 directory by @dependabot[bot] in #949

New Contributors

• @kozy4324 made their first contribution in #953

Commits

Full Changelog: v0.8.3...v0.8.4

v0.8.3

Parser

• Re-parse on unexpected ";" error for more accurate errors by @marcoroth in #902

Ruby

• Compile with -fvisibility=hidden flag by @timkaechele in #906

Engine

• Fix incomplete Hash handling in error_formatter by @christos in #915

libherb

• Compile with -fvisibility=hidden flag by @timkaechele in #906
• Add HERB_EXPORTED_FUNCTION macro for symbol visibility control by @marcoroth in #933

Dependencies

See all

• Update glob and js-yaml by @dependabot[bot] in #897
• Bump glob from 11.1.0 to 13.0.0 in /javascript/packages/config by @dependabot[bot] in #918
• Bump zod from 4.1.12 to 4.1.13 by @dependabot[bot] in #925
• Bump playwright from 1.55.1 to 1.56.1 by @dependabot[bot] in #922
• Bump glob from 11.1.0 to 13.0.0 in /javascript/packages/linter by @dependabot[bot] in #919
• Bump glob from 11.1.0 to 13.0.0 in /javascript/packages/printer by @dependabot[bot] in #920
• Bump typescript from 5.9.2 to 5.9.3 by @dependabot[bot] in #923
• Bump glob from 11.1.0 to 13.0.0 in /javascript/packages/rewriter by @dependabot[bot] in #921
• Bump body-parser from 2.2.0 to 2.2.1 in the npm_and_yarn group across 1 directory by @dependabot[bot] in #927
• Bump nx from 21.1.2 to 22.1.3 by @dependabot[bot] in #934
• Bump monaco-editor from 0.52.2 to 0.55.1 by @dependabot[bot] in #936
• Bump playwright from 1.56.1 to 1.57.0 by @dependabot[bot] in #935
• Bump @typescript-eslint/eslint-plugin from 8.46.4 to 8.48.0 by @dependabot[bot] in #937
• Bump express from 5.1.0 to 5.2.0 in the npm_and_yarn group across 1 directory by @dependabot[bot] in #938

New Contributors

• @christos made their first contribution in #915

Commits

Full Changelog: v0.8.2...v0.8.3