Features

• If using JS config files, the plugin option can now be given plugin functions to load.
• Permit - within tag names to support typescript-json-schema's @ TJS-type tag, #2972.
• Exposed Context.createSymbolId for use by plugins.

Bug Fixes

• Relative links in <img srcset> will now be discovered by TypeDoc, #2975.
• Relative links in <source src> and <source srcset> elements will now be discovered by TypeDoc, #2975.
• Improved inherited from/overwrites link discovery to point to parent properties in more cases, #2978

Thanks!

• @ jonathanhefner
• @ laymonage

Features

• Introduced the @ sortStrategy tag to override the sort option on a specific reflection, #2965.

Bug Fixes

• Classes and functions exported with export { type X } are no longer missing comments, #2970.
• Setting locale to an unknown value will now cause TypeDoc to operate in English instead of a debug locale.
• Array options will now report an error if set to a non-array/non-string value.

Features

• TypeDoc now supports resolving relative paths in links to the package directory as belonging to the project, #2961.
• Declarations without comments will now check for comments on their export specifier, #2964.

Bug Fixes

• Attempting to highlight a supported language which is not enabled is now a warning, not an error, #2956.
• Improved compatibility with CommonMark's link parsing, #2959.
• Classes, variables, and functions exported with export { type X } are now detected and converted as interfaces/type aliases, #2962.
• Improved warning messaging for links to symbols which were resolved, but the symbols were not included in the documentation, #2967.
• Fixed an issue preventing nested documents from being deserialized from TypeDoc's JSON output or used in packages mode, #2969.

Thanks!

• @ yGuy

Bug Fixes

• References to type aliases defined as mapped types will now correctly create a reference to the type alias, #2954.
• ignoredHighlightLanguages can now be used to prevent warnings for codeblocks containing languages
  which are supported by Shiki but are not loaded, #2956.

Features

• The navigation in the default theme will now attempt to break long names onto multiple lines, #2940.
• Added German (de) localization, #2941.

Bug Fixes

• TypeDoc's default theme now uses the same chevron for all collapsible elements, #2924
  The chevronSmall helper is now deprecated and will be removed with v0.29.0.
• Classes/interfaces marked with @ hidden will no longer appear in the
  "Hierarchy" section of the docs.
• TypeDoc now handles wildcard JSDoc types, #2949.

Thanks!

• @ blutorange
• @ bkeepers

Bug Fixes

• @ inline now functions when referencing tuple types, #2932.
• @ link links to the current page are now rendered, #2934.
• @ includeCode now supports regions in TypeScript files with .mts and .cts file extensions, #2935.
• Aliased symbols (re-exports) are now resolved before checking if they are excluded/external, #2937.
• Improved error reporting when paths including Windows separators are provided as globs, #2938.

Features

• @ group none and @ category none will now render their children without a section
  heading in the default theme, #2922.
• Added @ disableGroups tag to completely disable the grouping mechanism for a
  given reflection, #2922.

Bug Fixes

• Variables using @ class now correctly handle @ category, #2914.
• Variables using @ class now include constructor parameters, #2914.
• Variables using @ class with a generic first constructor function now adopt
  that function's type parameters as the class type parameters, #2914.
• When printing entry point globs which fail to match any paths, TypeDoc will no longer normalize the glob, #2918.
• Inlining types can now handle more type variants, #2920.
• Fixed behavior of externalSymbolLinkMappings option when URL is set to #, #2921.
• Fixed broken links within module pages when structure-dir router was used, #2928.
• Type parameters on JS classes defined with @ typedef now correctly handle the constraint, #2929.
• API: toString on types containing index signatures now behave correctly, #2917.
• Added @ inlineType to the list of tags excluded by default.

Features

• The TypeDocOptions interface now marks options as optional so it no longer has to be wrapped in Partial
  for use in config files, #2901.
• API: Expose control methods for deferred conversion for plugin use (typedoc-plugin-missing-exports)
• API: Expose method to disable TypeDoc usage of localStorage without clearing it, #2908.

Bug Fixes

• --watch can now infer entry points from package.json as supported in non-watch mode, #2899.
• @ include with regions now works on files with CRLF line endings, #2902.
• Generated page names now correctly handles UTF-8 characters requiring more than 16 bits #2905.
• Fixed a crash when converting module.exports = [], #2909.
• Fixed URL generation which introduced a superfluous ./ in relative links, #2910.

Thanks!

• @ jsmith2-coveo
• @ romainmnr

Breaking Changes

• TypeDoc now expects all input globs paths to be specified with / path separators, #2825.
• TypeDoc's --entryPointStrategy merge mode now requires JSON from at least version 0.28.0.
• Removed jp translations from lang, to migrate switch to ja.
• File name references in intentionallyNotExported now use a package name/package relative path instead of an absolute path for matching.
• The source-order sort ordering now considers package names / package relative paths instead of using the absolute paths to a file.
• TypeDoc will only check for a project README file next to the discovered package.json file if --readme is not set
  this change improves handling of monorepo setups where some packages have readme files and others do not, #2875.
• Function-like variable exports will now only be automatically converted as function types if
  they are initialized with a function expression. TypeDoc can be instructed to convert them as functions
  with the @ function tag, #2881.
• Object literal type alias types will now be converted in a way which causes them to be rendered more similarly
  to how interfaces are rendered, #2817.

API Breaking Changes

• ProjectReflection.getReflectionFromSymbol and ProjectReflection.getSymbolFromReflection have been moved to Context
• Path and PathArray parameter types now always contain normalized paths.
• Introduced a Router which is used for URL creation. Reflection.url,
  Reflection.anchor, and Reflection.hasOwnDocument have been removed.
• Deserializer.reviveProject(s) no longer accepts an option to add project documents.
• Deserializer.reviveProjects now requires an alwaysCreateEntryPointModule option.
• Comment.serializeDisplayParts no longer requires a serializer argument.
• ReflectionSymbolId.fileName is now optional, TypeDoc now stores a combination of a package name and package relative path instead.
  The fileName property will be present when initially created, but is not serialized.
• Removed DeclarationReflection.relevanceBoost attribute which was added for plugins, but never used.
• i18n proxy is no longer passed to many functions, instead, reference i18n exported from the module directly.
• ReflectionKind.singularString and ReflectionKind.pluralString now returns translated strings.
  The methods on Internationalization to do this previously have been removed.
• The HTML output structure for the search box has changed to support the new modal.
• DefaultThemeRenderContext's typeDeclaration and typeDetailsIfUseful
  methods now require both a reflection and a type in order to support
  @ expandType

Features

• Add support for TypeScript 5.8.x
• The search modal in the HTML output has been rewritten to provide better mobile support
• Added a --router option which can be used to modify TypeDoc's output folder
  structure. This can be extended with plugins, #2111.
• Introduced the @ primaryExport modifier tag to provide more fine grained
  control over export conversion order, #2856
• Introduced packagesRequiringDocumentation option for validation.notDocumented, TypeDoc will expect comments to be present for symbols in the specified packages.
• TypeDoc now exports a typedoc/browser entrypoint for parsing and using serialized JSON files, #2528.
• Type packageOptions as Partial<TypeDocOptions>, #2878.
• TypeDoc will now warn if an option which should only be set at the root level is set in packageOptions, #2878.
• Introduced @ function tag to force TypeDoc to convert variable declarations with a type annotation as functions, #2881.
• Exposed a TypeDoc global object in the HTML theme which can be used to prevent TypeDoc from using localStorage, #2872.
• Introduced @ preventInline and @ inlineType tags for further control extending the @ inline tag, #2862.
• Introduced @ preventExpand and @ expandType tags for further control extending the @ expand tag, #2862.
• API: Introduced DefaultThemeRenderContext.reflectionIcon for more granular control over displayed reflection icons.

Bug Fixes

• TypeDoc will now only create references for symbols re-exported from modules.
• Variable-functions will now prefer placing the comment on the signature if there is only one signature present, #2824.
• User filter settings will no longer sometimes cause the search to have fewer visible results than expected.
• Fixed handling of expando functions which were also merged with a namespace, #2876.
• Fixed rendering of function types within arrays and union types, #2892.
• Fixed an issue where if the theme JS didn't load, the page wouldn't be shown, #2894.

Thanks!

• @ crimx
• @ jsmith2-coveo
• @ phoneticallySAARTHaK
• @ XeroAlpha

See #2868 (comment) for discussion of changes