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How to hot reload a virtual module in a Vite plugin
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| function vitePlugin() { | |
| const virtualModuleDependency = 'virtual-module-conf.json'; | |
| const virtualModuleId = 'virtual:module'; | |
| const resolveVirtualId = (id) => '\0' + id; | |
| let virtualModuleContent; | |
| async function refreshVirtualModuleContent(reader) { | |
| const json = JSON.parse(await reader()); | |
| virtualModuleContent = `export default ${JSON.stringify(json.value)};`; | |
| } | |
| async function loadVirtualModule() { | |
| await refreshVirtualModuleContent(fs.readFile.bind(fs, virtualModuleDependecy)); | |
| return virtualModuleContent; | |
| } | |
| return { | |
| name: 'vite-plugin', | |
| resolveId(id) { | |
| if (id === virtualModuleId) { | |
| return resolveVirtualId(virtualModuleId); | |
| } | |
| }, | |
| load(id) { | |
| if (id === resolveVirtualId(virtualModuleId)) { | |
| return loadVirtualModule(); | |
| } | |
| }, | |
| handleHotUpdate({server, file, modules, read}) { | |
| if (!file.endsWith(virtualModuleDependency) { | |
| return modules; | |
| } | |
| refreshVirtualModuleContent(read); | |
| const virtualModule = server.moduleGraph.getModuleById( | |
| resolveVirtualId(virtualModuleId) | |
| ); | |
| return [...modules, virtualModule]; | |
| } | |
| }; | |
| } |
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