Added some snippets for javascript

Author: technoph1le

public/data/javascript.json

@@ -2,6 +2,30 @@
   {
     "categoryName": "Array Manipulation",
     "snippets": [
+      {
+        "title": "Slugify String",
+        "description": "Converts a string into a URL-friendly slug format.",
+        "code": [
+          "const slugify = (string, separator = \"-\") => {",
+          "  return string",
+          "    .toString() // Cast to string (optional)",
+          "    .toLowerCase() // Convert the string to lowercase letters",
+          "    .trim() // Remove whitespace from both sides of a string (optional)",
+          "    .replace(/\\s+/g, separator) // Replace spaces with {separator}",
+          "    .replace(/[^\\w\\-]+/g, \"\") // Remove all non-word chars",
+          "    .replace(/\\_/g, separator) // Replace _ with {separator}",
+          "    .replace(/\\-\\-+/g, separator) // Replace multiple - with single {separator}",
+          "    .replace(/\\-$/g, \"\"); // Remove trailing -",
+          "};",
+          "",
+          "// Usage:",
+          "const title = \"Hello, World! This is a Test.\";",
+          "console.log(slugify(title)); // Output: 'hello-world-this-is-a-test'",
+          "console.log(slugify(title, \"_\")); // Output: 'hello_world_this_is_a_test'"
+        ],
+        "tags": ["javascript", "string", "slug", "utility"],
+        "author": "dostonnabotov"
+      },
       {
         "title": "Remove Duplicates",
         "description": "Removes duplicate values from an array.",
@@ -94,8 +118,25 @@
     ]
   },
   {
-    "categoryName": "Utilities",
+    "categoryName": "Function Utilities",
     "snippets": [
+      {
+        "title": "Repeat Function Invocation",
+        "description": "Invokes a function a specified number of times.",
+        "code": [
+          "const times = (func, n) => {",
+          "  Array.from(Array(n)).forEach(() => {",
+          "    func();",
+          "  });",
+          "};",
+          "",
+          "// Usage:",
+          "const randomFunction = () => console.log('Function called!');",
+          "times(randomFunction, 3); // Logs 'Function called!' three times"
+        ],
+        "tags": ["javascript", "function", "repeat", "utility"],
+        "author": "dostonnabotov"
+      },
       {
         "title": "Debounce Function",
         "description": "Delays a function execution until after a specified time.",
@@ -180,5 +221,54 @@
         "author": "dostonnabotov"
       }
     ]
+  },
+  {
+    "categoryName": "Local Storage",
+    "snippets": [
+      {
+        "title": "Add Item to localStorage",
+        "description": "Stores a value in localStorage under the given key.",
+        "code": [
+          "const addToLocalStorage = (key, value) => {",
+          "  localStorage.setItem(key, JSON.stringify(value));",
+          "};",
+          "",
+          "// Usage:",
+          "addToLocalStorage('user', { name: 'John', age: 30 });"
+        ],
+        "tags": ["javascript", "localStorage", "storage", "utility"],
+        "author": "dostonnabotov"
+      },
+      {
+        "title": "Retrieve Item from localStorage",
+        "description": "Retrieves a value from localStorage by key and parses it.",
+        "code": [
+          "const getFromLocalStorage = (key) => {",
+          "  const item = localStorage.getItem(key);",
+          "  return item ? JSON.parse(item) : null;",
+          "};",
+          "",
+          "// Usage:",
+          "const user = getFromLocalStorage('user');",
+          "console.log(user); // Output: { name: 'John', age: 30 }"
+        ],
+        "tags": ["javascript", "localStorage", "storage", "utility"],
+        "author": "dostonnabotov"
+      },
+      {
+        "title": "Clear All localStorage",
+        "description": "Clears all data from localStorage.",
+        "code": [
+          "const clearLocalStorage = () => {",
+          "  localStorage.clear();",
+          "};",
+          "",
+          "// Usage:",
+          "clearLocalStorage(); // Removes all items from localStorage"
+        ],
+        "tags": ["javascript", "localStorage", "storage", "utility"],
+        "author": "dostonnabotov"
+      }
+    ]
   }
 ]