(opts, bundle)
| 294 | apply: 'build', |
| 295 | |
| 296 | async generateBundle(opts, bundle) { |
| 297 | if (config.build.ssr) { |
| 298 | return |
| 299 | } |
| 300 | |
| 301 | const chunkFileNameToPolyfills = |
| 302 | outputToChunkFileNameToPolyfills.get(opts) |
| 303 | if (chunkFileNameToPolyfills == null) { |
| 304 | throw new Error( |
| 305 | 'Internal @vitejs/plugin-legacy error: discovered polyfills should exist', |
| 306 | ) |
| 307 | } |
| 308 | |
| 309 | if (!isLegacyBundle(bundle)) { |
| 310 | // Merge discovered modern polyfills to `modernPolyfills` |
| 311 | for (const { modern } of chunkFileNameToPolyfills.values()) { |
| 312 | modern.forEach((p) => modernPolyfills.add(p)) |
| 313 | } |
| 314 | if (!modernPolyfills.size) { |
| 315 | return |
| 316 | } |
| 317 | if (isDebug) { |
| 318 | console.log( |
| 319 | `[@vitejs/plugin-legacy] modern polyfills:`, |
| 320 | modernPolyfills, |
| 321 | ) |
| 322 | } |
| 323 | await buildPolyfillChunk( |
| 324 | this, |
| 325 | config.mode, |
| 326 | modernPolyfills, |
| 327 | bundle, |
| 328 | facadeToModernPolyfillMap, |
| 329 | config.build, |
| 330 | 'es', |
| 331 | opts, |
| 332 | true, |
| 333 | genLegacy, |
| 334 | ) |
| 335 | return |
| 336 | } |
| 337 | |
| 338 | if (!genLegacy) { |
| 339 | return |
| 340 | } |
| 341 | |
| 342 | // Merge discovered legacy polyfills to `legacyPolyfills` |
| 343 | for (const { legacy } of chunkFileNameToPolyfills.values()) { |
| 344 | legacy.forEach((p) => legacyPolyfills.add(p)) |
| 345 | } |
| 346 | |
| 347 | // legacy bundle |
| 348 | if (options.polyfills !== false) { |
| 349 | // check if the target needs Promise polyfill because SystemJS relies on it |
| 350 | // https://github.com/systemjs/systemjs#ie11-support |
| 351 | await detectPolyfills( |
| 352 | `Promise.resolve(); Promise.all();`, |
| 353 | targets, |
nothing calls this directly
no test coverage detected