cri - use none for no flag value as "" will be undefined in Deno

at least for Windows

Author: cderv

news/changelog-1.6.md

@@ -103,7 +103,7 @@ All changes included in 1.6:
 
 ## Chromium support
 
-- ([#11135](https://github.com/quarto-dev/quarto-cli/issues/11135)): Use `--headless=old` mode for Chromium to avoid recent issues with the new `--headless` mode. Setting `--headless=new` can be configured with `QUARTO_CHROMIUM_HEADLESS_MODE=new` environment variable, however it is not recommended new headless mode seems to be unstable. Only use to be unblocked of a situation (like `QUARTO_CHROMIUM_HEADLESS_MODE=""` if you use a old chrome version somehow).
+- ([#11135](https://github.com/quarto-dev/quarto-cli/issues/11135)): Use `--headless=old` mode for Chromium to avoid recent issues with the new `--headless` mode. Setting `--headless=new` can be configured with `QUARTO_CHROMIUM_HEADLESS_MODE=new` environment variable, however it is not recommended new headless mode seems to be unstable. Only use to be unblocked of a situation (like `QUARTO_CHROMIUM_HEADLESS_MODE="none"` if you use a old chrome version somehow that don't support `--headless=old`).
 - ([#10170](https://github.com/quarto-dev/quarto-cli/issues/10170)): Quarto should find chrome executable automatically on most OS. If this is does not find it, or a specific version is needed, set `QUARTO_CHROMIUM` environment variable to the executable path.
 
 ## Other Fixes and Improvements

src/core/cri/cri.ts

@@ -93,7 +93,7 @@ export async function criClient(appPath?: string, port?: number) {
     // move to the new mode. We'll use `--headless=old` as the default for now
     // until the new mode is more stable, or until we really pin a version as default to be used.
     // This is also impacting in chromote and pagedown R packages and we could keep syncing with them.
-    `--headless${headlessMode ? "=" + headlessMode : ""}`,
+    `--headless${headlessMode == "none" ? "" : "=" + headlessMode}`,
     "--no-sandbox",
     "--disable-gpu",
     "--renderer-process-limit=1",