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61 lines
2.0 KiB
JavaScript
61 lines
2.0 KiB
JavaScript
// This example uses @typescript/vfs to create a virtual TS program
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// which can do work on a bg thread.
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// This version of the vfs edits the global scope (in the case of a webworker, this is 'self')
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importScripts("https://unpkg.com/@typescript/vfs@1.3.0/dist/vfs.globals.js")
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/** @type { import("@typescript/vfs") } */
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const tsvfs = globalThis.tsvfs
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/** @type {import("../src/tsWorker").CustomTSWebWorkerFactory }*/
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const worker = (TypeScriptWorker, ts, libFileMap) => {
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return class MonacoTSWorker extends TypeScriptWorker {
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// Adds a custom function to the webworker
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async getDTSEmitForFile(fileName) {
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const result = await this.getEmitOutput(fileName)
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const firstDTS = result.outputFiles.find(o => o.name.endsWith(".d.ts"))
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return (firstDTS && firstDTS.text) || ""
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}
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async printAST(fileName) {
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console.log("Creating virtual TS project")
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const compilerOptions = this.getCompilationSettings()
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const fsMap = new Map()
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for (const key of Object.keys(libFileMap)) {
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fsMap.set(key, "/" + libFileMap[key])
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}
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const thisCode = await this.getScriptText(fileName)
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fsMap.set("index.ts", thisCode)
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console.log("Starting up TS program")
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const system = tsvfs.createSystem(fsMap)
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const host = tsvfs.createVirtualCompilerHost(system, compilerOptions, ts)
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const program = ts.createProgram({
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rootNames: [...fsMap.keys()],
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options: compilerOptions,
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host: host.compilerHost,
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})
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// Now I can look at the AST for the .ts file too
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const mainSrcFile = program.getSourceFile("index.ts")
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let miniAST = "SourceFile"
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const recurse = (parent, depth) => {
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if (depth > 5) return
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ts.forEachChild(parent, node => {
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const spaces = " ".repeat(depth + 1)
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miniAST += `\n${spaces}${ts.SyntaxKind[node.kind]}`
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recurse(node, depth + 1)
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})
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}
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recurse(mainSrcFile, 0)
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return miniAST
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}
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}
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}
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self.customTSWorkerFactory = worker
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