11. **Random Number Generator**:
```javascript
const randomNum = Math.floor(Math.random() * 100) + 1;
console.log(`Random number between 1 and 100: ${randomNum}`);
```
This code generates a random integer between 1 and 100 and logs it to the console. You can adjust the range as needed.
12. **String Interpolation**:
```javascript
const name = "Alice";
const greeting = `Hello, ${name}!`;
console.log(greeting);
```
This code uses template literals to create a dynamic string with the value of the `name` variable inserted into the greeting.
13. **Check if Element Exists**:
```javascript
if (document.getElementById("myElement")) {
console.log("Element exists.");
} else {
console.log("Element does not exist.");
}
```
This code checks if an HTML element with the ID "myElement" exists on the page and logs the result.
14. **Scroll to Top Button**:
```javascript
const scrollToTopButton = document.getElementById("scrollToTop");
scrollToTopButton.addEventListener("click", function() {
window.scrollTo({
top: 0,
behavior: "smooth"
});
});
```
This code adds a click event listener to a button with the ID "scrollToTop" that, when clicked, smoothly scrolls the page to the top.
15. **Simple Form Validation**:
```javascript
const form = document.getElementById("myForm");
form.addEventListener("submit", function(event) {
if (!form.checkValidity()) {
alert("Please fill out the required fields.");
event.preventDefault();
}
});
```
This code adds a form submission event listener to check if all required fields are filled out. If not, it displays an alert and prevents the form from submitting.
These additional JavaScript snippets cover a range of practical tasks, including random number generation, string interpolation, checking element existence, implementing a "scroll to top" button, and basic form validation.
