feat: add warnOnce

.changeset/fresh-buses-lay.md

@@ -0,0 +1,5 @@
+---
+"@masknet/kit": patch
+---
+
+add warnOnce

src/ecmascript/warnOnce.ts

@@ -0,0 +1,15 @@
+/**
+ * Warn a message only once.
+ * @example
+ * const warn = warnOnce('This is a warning')
+ * warn() // This is a warning
+ * warn() // (no output)
+ */
+export function warnOnce(...data: any[]) {
+    let warned = false
+    return () => {
+        if (warned) return
+        warned = true
+        console.warn(...data)
+    }
+}

src/index.ts

@@ -3,6 +3,7 @@ export { concatArrayBuffer } from './ecmascript/concatArrayBuffer.js'
 export { isArrayBufferEqual } from './ecmascript/isArrayBufferEqual.js'
 export { decodeHexString, encodeHexString } from './ecmascript/hex-string.js'
 export { lazy } from './ecmascript/lazyDecorator.js'
+export { warnOnce } from './ecmascript/warnOnce.js'
 
 export {
     detectAudioSupport,