preTransformRequest() — vite Function Reference

Architecture documentation for the preTransformRequest() function in indexHtml.ts from the vite codebase.

Function typescript ViteCore ConfigEngine calls 3 called by 2

Entity Profile

ViteCore→ ConfigEngine→ preTransformRequest() — vite Function Reference

Dependency Diagram

graph TD
  29f999b6_18cf_5f75_7b27_cf12b0774ee0["preTransformRequest()"]
  3f56d5b2_9fca_532f_3bfc_6bfb2be77015["indexHtml.ts"]
  29f999b6_18cf_5f75_7b27_cf12b0774ee0 -->|defined in| 3f56d5b2_9fca_532f_3bfc_6bfb2be77015
  98ce5fcf_1d4d_c6f5_6eed_3bde652f7be3["processNodeUrl()"]
  98ce5fcf_1d4d_c6f5_6eed_3bde652f7be3 -->|calls| 29f999b6_18cf_5f75_7b27_cf12b0774ee0
  c7929a5b_9791_180a_9c0b_4f479fb4cf3f["devHtmlHook()"]
  c7929a5b_9791_180a_9c0b_4f479fb4cf3f -->|calls| 29f999b6_18cf_5f75_7b27_cf12b0774ee0
  795dec35_22f9_80f5_ccab_9c2d170af0d3["unwrapId()"]
  29f999b6_18cf_5f75_7b27_cf12b0774ee0 -->|calls| 795dec35_22f9_80f5_ccab_9c2d170af0d3
  013086ce_01e9_45cb_743f_587baeb03e55["stripBase()"]
  29f999b6_18cf_5f75_7b27_cf12b0774ee0 -->|calls| 013086ce_01e9_45cb_743f_587baeb03e55
  98bdaae6_bc72_05d1_f51a_469bced673c2["warmupRequest()"]
  29f999b6_18cf_5f75_7b27_cf12b0774ee0 -->|calls| 98bdaae6_bc72_05d1_f51a_469bced673c2
  style 29f999b6_18cf_5f75_7b27_cf12b0774ee0 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

packages/vite/src/node/server/middlewares/indexHtml.ts lines 546–556

function preTransformRequest(
  server: ViteDevServer,
  decodedUrl: string,
  decodedBase: string,
) {
  if (!server.config.server.preTransformRequests) return

  // transform all url as non-ssr as html includes client-side assets only
  decodedUrl = unwrapId(stripBase(decodedUrl, decodedBase))
  server.warmupRequest(decodedUrl)
}