Function preImportMapHook

packages/vite/src/node/plugins/html.ts:1177–1200

(
  config: ResolvedConfig,
)

    }

export function preImportMapHook(
  config: ResolvedConfig,
): IndexHtmlTransformHook {
  return (html, ctx) => {
    const importMapIndex = html.search(importMapRE)
    if (importMapIndex < 0) return

    const importMapAppendIndex = html.search(importMapAppendRE)
    if (importMapAppendIndex < 0) return

    if (importMapAppendIndex < importMapIndex) {
      const relativeHtml = normalizePath(
        path.relative(config.root, ctx.filename),
      )
      config.logger.warnOnce(
        colors.yellow(
          colors.bold(
            `(!) <script type="importmap"> should come before <script type="module"> and <link rel="modulepreload"> in /${relativeHtml}`,
          ),
        ),
      )
    }
  }
}

/**
 * Move importmap before the first module script and modulepreload link