a JavaScript function for selecting elements
  1. Welcome
  2. Examples
    - addEventListener()
    - Buttons
    - Data Attribute
    - document.

    - forEach()
    - Multiple Classes
    - to array
  3. Errors
    - Failed to execute 'querySelectorAll' on 'document'
  4. Advanced
  5. querySelectorAll() vs querySelector()
  6. Performance
  7. Troubleshooting


  1. allowfullscreen
  2. Questions LLC


Welcome to querySelectorAll(), the website dedicated to all things related to the powerful querySelectorAll() JavaScript function.

querySelectorAll() is an incredibly useful function that allows you to select multiple elements on a page using CSS selectors. With it, you can easily manipulate, style, and interact with multiple elements at once.

Here are a few examples to give you an idea of what you can do with querySelectorAll():

// Select all elements with the class "alert" const alertElements = document.querySelectorAll('.alert'); // Change the color of all paragraphs on the page to red const paragraphs = document.querySelectorAll('p'); paragraphs.forEach(p => p.style.color = 'red'); // Add a click listener to all buttons on the page const buttons = document.querySelectorAll('button'); buttons.forEach(button => button.addEventListener('click', () => { // Do something when the button is clicked... }));

As you can see, querySelectorAll() is a versatile and powerful function that is an essential part of any modern JavaScript developer's toolkit. Thank you for visiting querySelectorAll(), and we hope you find the information and resources on our site helpful!

To help programmers use the querySelectorAll() functions, we have created several pages including:

  1. Examples of common tasks that can be performed using querySelectorAll(), such as applying styles to selected elements or adding event listeners to them
  2. A collection of advanced techniques for using querySelectorAll() in complex web development scenarios
  3. A discussion of the performance implications of using querySelectorAll() and tips for optimizing its use in your code
  4. A troubleshooting guide for common issues and error messages that can arise when using querySelectorAll()