- Tags: Form, Pseudo-Class, Selector
- Categories: CSS Reference, CSS Selectors, Reference
Quick Reference
The :invalid selector selects form elements with a value that does not validate according to the element’s settings.
The :invalid selector only works for form elements with limitations, such as input elements with min/max attributes, email fields, or number fields without a valid numeric value.
/* selects all form input fields that are invalid */
input:invalid {
box-shadow: 0 0 1px 1px red;
}
Selecting Multiple Elements
#intro, #footer, .my_paragraphs, h3 {
background: white;
}
Increasing Specificity
.grandfather #son .child p {
background: white;
}
h1.intro, p#footer, h1#header.primary, #sidebar#topper.image {
background: white;
}
We’d like to acknowledge that we learned a great deal of our coding from W3Schools and TutorialsPoint, borrowing heavily from their teaching process and excellent code examples. We highly recommend both sites to deepen your experience, and further your coding journey. We’re just hitting the basics here at 1SMARTchicken.
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CSS NOTES:
- The “inherit”, “initial” and “unset” keywords can be used with any CSS property to set its value
- In CSS there are many ways to express a color value in a property
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