In the world of web design, one of the very important features of CSS is the selectors that allow us to apply specific styles to specific elements on the page. One of the selectors that may be less recognized is the :valid selector. This selector enables us to style elements that have received valid data from input fields. We will further explore this selector and its applications later.
The :valid selector is specifically for input elements and can help you determine whether the submitted data in the form complies with the defined validation rules. This means that if the entered data matches the validation rules you have established, it could potentially alter the appearance of that input. For example, you can change the color of valid inputs to notify the user that their data is correct.
This selector, along with other form selectors like :invalid, :required, and :optional, allows you to have complete control over different states of the forms. Using this selector not only enhances user experience but also increases the usability of your interface.
Therefore, utilizing the :valid selector can assist in creating user-friendly and aesthetically pleasing forms, guiding users through the input process seamlessly. To better understand this selector and see it in action, we will provide an example of its use later on.
<style>
input:valid {
border-color: limegreen;
background-color: #eaffea;
}
</style>
<form>
<input type="text" pattern="[a-zA-Z0-9]+" required>
<input type="email" required>
</form>
In this example, a <style> is defined for the input:valid selector, applying two styles: changing the border color to green and the background color to a light green.
This means that whenever valid input is provided in the text and email fields, these styles will be applied.
In HTML, an example form includes two inputs: a text field and an email field, both of which have specific validation rules.
The text field accepts only letters and numbers, while the email field is also validated for correct email input.
Ultimately, if the input data is correct in any of the fields, the styles defined in CSS will be applied successfully.