The double dollar sign selector query function, known as $$(), is a handy tool for developers working with web development in modern browsers like Chrome and Firefox. This function allows you to select and manipulate elements within the Document Object Model (DOM) using CSS selectors.
In both Chrome and Firefox, $$() is a shorthand alias for document.querySelectorAll(). This means you can use CSS selectors to target multiple elements on a webpage and perform operations on them efficiently.
To use $$() in your code, simply open the developer tools in your browser by right-clicking on a webpage and selecting "Inspect" or by pressing F12. Then, navigate to the Console tab where you can start typing your JavaScript code.
For example, if you want to select all elements with a class of "example-class," you can use the $$() function like this:
let elements = $$('.example-class');This will return an array-like object containing all the elements that match the specified CSS selector.
Additionally, you can combine $$() with other JavaScript functions to manipulate the selected elements further. For instance, you can iterate through the returned elements using forEach() and apply changes to each element individually.
$$('.example-class').forEach(element => {
element.style.color = 'red';
});By using $$(), you can streamline your development process and speed up your workflow when working with complex web applications that require DOM manipulation.
It's worth noting that while $$() is a convenient feature in Chrome and Firefox, it may not be supported in all browsers. Therefore, it's essential to test your code across different browsers to ensure compatibility.
In conclusion, the double dollar sign selector query function, $$(), is a powerful tool for web developers seeking to select and manipulate multiple elements efficiently using CSS selectors in Chrome and Firefox. By incorporating this function into your workflow, you can enhance your productivity and streamline the development process.