Function read

packages/vite/src/node/plugins/css.ts:3244–3270

(filePath)

          projectRoot: config.root,
          resolver: {
            async read(filePath) {
              if (filePath === filename) {
                return src
              }

              const code = fs.readFileSync(filePath, 'utf-8')
              const lang = CSS_LANGS_RE.exec(filePath)?.[1] as
                | CssLang
                | undefined
              if (isPreProcessor(lang)) {
                const result = await compileCSSPreprocessors(
                  environment,
                  id,
                  lang,
                  code,
                  workerController,
                )
                result.deps?.forEach((dep) => deps.add(dep))
                // TODO: support source map
                return result.code
              } else if (lang === 'sss') {
                const sssResult = await transformSugarSS(environment, id, code)
                // TODO: support source map
                return sssResult.code
              }
              return code
            },
            async resolve(id, from) {
              const publicFile = checkPublicFile(
                id,