wip: add more questions

src/data/question-groups/javascript/content/measure-dimensions.md

@@ -0,0 +1,8 @@
+You can use `getBoundingClientRect` method to get the dimensions of an element.
+
+```js
+const roadmapWrapper = document.querySelector('.roadmap-wrapper');
+const dimensions = roadmapWrapper.getBoundingClientRect();
+
+console.log(dimensions); // DOMRect { x: 8, y: 8, width: 784, height: 784, top: 8, right: 792, bottom: 792, left: 8 }
+```

src/data/question-groups/javascript/content/merge-arrays.md

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+Yes, you can merge multiple arrays into one array using the `concat()` method, or the spread operator `...`.
+
+## concat()
+
+The `concat()` method is used to merge two or more arrays. This method does not change the existing arrays, but instead returns a new array.
+
+```js
+const arr1 = [1, 2, 3];
+const arr2 = [4, 5, 6];
+
+const arr3 = arr1.concat(arr2);
+console.log(arr3); // [1, 2, 3, 4, 5, 6]
+```
+
+## Spread operator
+
+The spread operator `...` is used to expand an iterable object into the list of arguments.
+
+```js
+const arr1 = [1, 2, 3];
+const arr2 = [4, 5, 6];
+
+const arr3 = [...arr1, ...arr2];
+console.log(arr3); // [1, 2, 3, 4, 5, 6]
+```

src/data/question-groups/javascript/content/remove-element.md

@@ -0,0 +1,9 @@
+To remove a DOM element, you can use the `remove` or `removeChild` method of the `Node` interface.
+
+```js
+const roadmapWrapper = document.querySelector('.roadmap-wrapper');
+const roadmapTitle = document.querySelector('#roadmap-title');
+
+roadmapWrapper.removeChild(roadmapTitle);
+roadmapWrapper.remove();
+```

src/data/question-groups/javascript/content/scroll-to-top.md

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+In order to scroll to the top of the page, we can use the `scrollTo` method.
+
+```js
+window.scrollTo(0, 0);
+```

src/data/question-groups/javascript/javascript.md

@@ -368,4 +368,24 @@ questions:
     topics:
       - 'DOM'
       - 'Beginner'
+  - question: How to remove an Element from DOM?
+    answer: remove-element.md
+    topics:
+      - 'DOM'
+      - 'Beginner'
+  - question: How to scroll to the top of the page using JavaScript?
+    answer: scroll-to-top.md
+    topics:
+      - 'DOM'
+      - 'Beginner'
+  - question: How to measure dimensions of an Element?
+    answer: measure-dimensions.md
+    topics:
+      - 'DOM'
+      - 'Beginner'
+  - question: Can you merge multiple arrays in JavaScript?
+    answer: merge-arrays.md
+    topics:
+      - 'Core'
+      - 'Intermediate'
 ---