Setup: main_project is stencil application. lib is stencil component library. main_project renders only app-home component, which depends on my-component from lib. We are using defineCustomElements from loader to prefix custom element tags. To link the lib project with main_project we used yarc. npm link is not sufficient. Install yalc globaly `npm i -g yalc` Initialize / update the lib package via yalc by using `npm run link` (call on each change of the build). Please use `yalc link lib` on main_project once to link to local lib package. Experiments: State: good (partially) Commit hash: fc0ebd3f6a4e756c409c8943917c538c81e4fba6 Titel: render component from lib with original tag as well as prefixed. Description: my-component includes a slot and will be rendered properly on app-home by original as well as prefixed tag name. Issues: * Problem: Stencil generates a definition file on loader folder with wrong definition Error message: TypeScript: ./src/global/app.ts:7:34 Argument of type '{ transformTagName: (tagName: any) => string; }' is not assignable to parameter of type 'CustomElementsDefineOptions'.Object literal may only specify known properties, and 'transformTagName' does not exist in type 'CustomElementsDefineOptions'. Reproduction: just start main project without mitigation Mitigation: after build job, we delete the file ./loader/index.d.ts Reported: ionic-team/stencil#2847 * Problem: sporadically errors can be thrown Error message: TypeError: Cannot read properties of undefined (reading '$instanceValues$') Reproduction: on main_project 'npm run start'; open browser inspector (chrome); reload main_project > 1 of 4 reloads results in the error message Mitigation: none ----- State: bad Commit hash: 800ed183595ba7c3318a4d743b10e71d9aeb10c2 Titel: render component from lib (original and and prefixed). my-component renders a child component (my-child) Description: my-component includes my-child. The build process of the lib will create a file called ./dist/my-child_2.entry.js. The build process of main_project on the other hand creates a file ./www/build/my-child.entry.js. Unfortunatelly stencil tries to load my-child_2.entry.js as well as my-child.entry.js. Issues: * Problem: main_project tries to load not existing entry file. Error message: TypeError: Failed to fetch dynamically imported module: http://localhost:3333/build/my-child_2.entry.js undefined Reproduction: allways on start of main_project Mitigation: none ----- State: good Titel: Mitigation via data-opt Prepare Lib: * use custom JSX Factory function h() instead of method of stencil/core * prefix name of all lib components with '__prefix__'; e.g. '__prefix__-component' * set data-opt property on corresponding script element on global script, see ./lib/src/global/lib.ts * set stencil.config property extras.tagNameTransform = true Prepare Main Project: * activate data-opt via extras.scriptDataOpts: true inside stencil.config * activate tag name transformation via extras.tagNameTransform: true inside stencil.config * define a proper prefix for all lib components (__prefix__ will be replaced by) env.prefix: 'xxxx' inside stencil.config * mirror the namespace of the main project by setting env.namespace: 'main' inside stencil.config * set attribute on main project script data-stencil-namespace and mirror the namespace as value; e.g. data-stencil-namespace="main" * (optional) extend JSX.IntrinsicElements interface with your transformed component tags and import definition file on index.ts; see ./main_project/src/lib-components.d.ts