feat(std/node): add isPrimitive (#4673)

2 files changed, 30 insertions, 0 deletions

diff --git a/std/node/util.ts b/std/node/util.ts
index 9879da513..73cbbf823 100644
--- a/std/node/util.ts
+++ b/std/node/util.ts
@@ -46,6 +46,12 @@ export function isRegExp(value: unknown): boolean {
   return value instanceof RegExp;
 }
 
+export function isPrimitive(value: unknown): boolean {
+  return (
+    value === null || (typeof value !== "object" && typeof value !== "function")
+  );
+}
+
 export function validateIntegerRange(
   value: number,
   name: string,
diff --git a/std/node/util_test.ts b/std/node/util_test.ts
index 05cec15df..b4e6ea41f 100644
--- a/std/node/util_test.ts
+++ b/std/node/util_test.ts
@@ -124,3 +124,27 @@ test({
     assert(!util.isArray(null));
   },
 });
+
+test({
+  name: "[util] isPrimitive",
+  fn() {
+    const stringType = "hasti";
+    const booleanType = true;
+    const integerType = 2;
+    const symbolType = Symbol("anything");
+
+    const functionType = function doBest(): void {};
+    const objectType = { name: "ali" };
+    const arrayType = [1, 2, 3];
+
+    assert(util.isPrimitive(stringType));
+    assert(util.isPrimitive(booleanType));
+    assert(util.isPrimitive(integerType));
+    assert(util.isPrimitive(symbolType));
+    assert(util.isPrimitive(null));
+    assert(util.isPrimitive(undefined));
+    assert(!util.isPrimitive(functionType));
+    assert(!util.isPrimitive(arrayType));
+    assert(!util.isPrimitive(objectType));
+  },
+});