feat: add compatibility with txiki.js (#1895)

* feat: add compatibility with txiki.js
txiki.js is compatible with most of the browser api, but it does not have the document variable.

* style: run lint-fix

* fix: navigator undefined

src/lib/is-browser.ts

@@ -25,6 +25,9 @@ const isStandardBrowserEnv = () => {
 	return false
 }
 
+const isTxikijsEnv = () =>
+	typeof navigator !== 'undefined' && navigator.userAgent === 'txiki.js'
+
 const isWebWorkerEnv = () =>
 	Boolean(
 		// eslint-disable-next-line no-restricted-globals
@@ -37,7 +40,10 @@ const isReactNativeEnv = () =>
 	typeof navigator !== 'undefined' && navigator.product === 'ReactNative'
 
 const isBrowser =
-	isStandardBrowserEnv() || isWebWorkerEnv() || isReactNativeEnv()
+	isStandardBrowserEnv() ||
+	isWebWorkerEnv() ||
+	isReactNativeEnv() ||
+	isTxikijsEnv()
 
 export const isWebWorker = isWebWorkerEnv()