fix: allow nullish color for colorReplacement, fix ansi highlighting …

…with dark-plus, fix #597 (#598)

packages/core/src/utils.ts

@@ -147,7 +147,7 @@ export function splitTokens<
 }
 
 export function applyColorReplacements(color: string, replacements?: Record<string, string>): string {
-  return replacements?.[color.toLowerCase()] || color
+  return replacements?.[color?.toLowerCase()] || color
 }
 
 export function getTokenStyleObject(token: TokenStyles) {

packages/shiki/test/ansi.test.ts

@@ -31,3 +31,16 @@ Packages: +1038
 
   expect(out).toMatchFileSnapshot('./out/ansi-background.html')
 })
+
+// https://github.com/shikijs/shiki/issues/597
+it('renders ansi to html with theme dark-plus', async () => {
+  const out = await codeToHtml(` WARN  using --force I sure hope you know what you are doing
+Scope: all 6 workspace projects
+Lockfile is up to date, resolution step is skipped
+Packages: +952
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+Progress: resolved 952, reused 910, downloaded 42, added 952, done
+Done in 15.7s`, { theme: 'dark-plus', lang: 'ansi' })
+
+  expect(out).toMatchFileSnapshot('./out/ansi-dark-plus.html')
+})