cachedRequest() — vite Function Reference

Source Code

packages/vite/src/module-runner/runner.ts lines 170–222

  private async cachedRequest(
    url: string,
    mod: EvaluatedModuleNode,
    callstack: string[] = [],
    metadata?: SSRImportMetadata,
  ): Promise<any> {
    const meta = mod.meta!
    const moduleId = meta.id

    const { importers } = mod

    const importee = callstack[callstack.length - 1]

    if (importee) importers.add(importee)

    // check circular dependency
    if (
      callstack.includes(moduleId) ||
      this.isCircularModule(mod) ||
      this.isCircularImport(importers, moduleId)
    ) {
      if (mod.exports) return this.processImport(mod.exports, meta, metadata)
    }

    let debugTimer: any
    if (this.debug) {
      debugTimer = setTimeout(() => {
        const getStack = () =>
          `stack:\n${[...callstack, moduleId]
            .reverse()
            .map((p) => `  - ${p}`)
            .join('\n')}`

        this.debug!(
          `[module runner] module ${moduleId} takes over 2s to load.\n${getStack()}`,
        )
      }, 2000)
    }

    try {
      // cached module
      if (mod.promise)
        return this.processImport(await mod.promise, meta, metadata)

      const promise = this.directRequest(url, mod, callstack)
      mod.promise = promise
      mod.evaluated = false
      return this.processImport(await promise, meta, metadata)
    } finally {
      mod.evaluated = true
      if (debugTimer) clearTimeout(debugTimer)
    }
  }