✏️ Fix spelling mistake in description and update filterObject function to handle null and undefined values

Author: realvishalrana

public/data/javascript.json

@@ -121,18 +121,26 @@
     "snippets": [
       {
         "title": "Filter Object",
-        "description": "Filters out entries in an object where the value is falsy.",
+        "description": "Filter out entries in an object where the value is falsy, including empty strings, empty objects, null, and undefined.",
         "code": [
           "export const filterObject = (object = {}) =>",
           "  Object.fromEntries(",
           "    Object.entries(object)",
-          "      .map(([key, value]) => value && [key, value])",
-          "      .filter((item) => item),",
+          "      .filter(([key, value]) => value !== null && value !== undefined && value !== '' && (typeof value !== 'object' || Object.keys(value).length > 0))",
           "  );",
           "",
           "// Usage:",
-          "const obj = { a: 1, b: null, c: undefined, d: 4 };",
-          "console.log(filterObject(obj)); // Output: { a: 1, d: 4 }"
+          "const obj1 = { a: 1, b: null, c: undefined, d: 4, e: '', f: {} };",
+          "console.log(filterObject(obj1)); // Output: { a: 1, d: 4 }",
+          "",
+          "const obj2 = { x: 0, y: false, z: 'Hello', w: [] };",
+          "console.log(filterObject(obj2)); // Output: { z: 'Hello' }",
+          "",
+          "const obj3 = { name: 'John', age: null, address: { city: 'New York' }, phone: '' };",
+          "console.log(filterObject(obj3)); // Output: { name: 'John', address: { city: 'New York' } }",
+          "",
+          "const obj4 = { a: 0, b: '', c: false, d: {}, e: 'Valid' };",
+          "console.log(filterObject(obj4)); // Output: { e: 'Valid' }"
         ],
         "tags": ["javascript", "object", "filter", "utility"],
         "author": "realvishalrana"