diff --git a/javascript/json-transform/src/functions/TransformerFunctionIf.ts b/javascript/json-transform/src/functions/TransformerFunctionIf.ts
index 813fd57..e624953 100644
--- a/javascript/json-transform/src/functions/TransformerFunctionIf.ts
+++ b/javascript/json-transform/src/functions/TransformerFunctionIf.ts
@@ -34,8 +34,8 @@ class TransformerFunctionIf extends TransformerFunction {
       const cje = arr[0];
       if (isNullOrUndefined(cje)) {
         condition = false;
-      } else if (context.isJsonBoolean(cje)) {
-        condition = Boolean(cje);
+      } else if (typeof cje === "boolean") {
+        condition = cje;
       } else {
         condition = isTruthy(await context.transform(cje));
       }
diff --git a/javascript/json-transform/src/functions/TransformerFunctionIs.ts b/javascript/json-transform/src/functions/TransformerFunctionIs.ts
index 820c967..5d4ab27 100644
--- a/javascript/json-transform/src/functions/TransformerFunctionIs.ts
+++ b/javascript/json-transform/src/functions/TransformerFunctionIs.ts
@@ -77,7 +77,7 @@ class TransformerFunctionIs extends TransformerFunction {
       let that: any = null;
       // if operator is not in/nin then prepare the "that" argument which is a JsonElement
       if (op !== "IN" && op !== "NIN") {
-        that = await (context.isJsonNumber(value) ? context.getBigDecimal("that") : context.getJsonElement("that"));
+        that = await (typeof value === "number" ? context.getBigDecimal("that") : context.getJsonElement("that"));
       }
       switch (op) {
         case "IN": {
diff --git a/javascript/json-transform/src/functions/common/FunctionContext.ts b/javascript/json-transform/src/functions/common/FunctionContext.ts
index 56b2c67..5d6e71a 100644
--- a/javascript/json-transform/src/functions/common/FunctionContext.ts
+++ b/javascript/json-transform/src/functions/common/FunctionContext.ts
@@ -93,14 +93,6 @@ class FunctionContext {
     return isNullOrUndefined(value);
   }
 
-  public isJsonNumber(value: any) {
-    return typeof value === "number";
-  }
-
-  public isJsonBoolean(value: any) {
-    return typeof value === "boolean";
-  }
-
   public async getUnwrapped(name: string | null, reduceBigDecimals?: boolean) {
     const value = await this.get(name, true);
     if (value instanceof JsonElementStreamer) {