CSS – :invalid Selector
The :invalid selector selects form elements with a value that does not validate according to the element’s settings.
The :invalid selector selects form elements with a value that does not validate according to the element’s settings.
The :optional selector selects form elements which are optional (those without the required attribute).
The :out-of-range selector selects elements with a value that is NOT within a specified range, and only works for input elements with min/max attributes.
The ::placeholder selector selects form inputs with placeholder text.
The :read-only selector selects form inputs which are “readonly” (those with a “readonly” attribute).
The :read-write selector selects form inputs which are “readable” and “writeable” (those with no “readonly” or “disabled” attributes).
The :required selector selects form inputs which are required (those with the required attribute).
The :valid selector selects form inputs with a value that properly validates according to the element’s settings.
The accent-color property specifies the accent color for user controls and indicators such as input
elements, and the progress
element.
You may have a form field that auto populates information via JavaScript so you need to disable the input so that the user cannot change the value.
To give a site an interesting and modern feel, the transition property can be used to expand the length of the search field when the user clicks into it.
Placeholders are text shown inside a form field that suggests to the user the type of input requested. They can be hidden with CSS when the field has focus.
The :button selector selects HTML form input
elements and button
elements with type=”button”.
The :checkbox selector selects HTML form input
elements with type=”checkbox”.
The :checked selector selects all checked HTML checkboxes or radio buttons.
The :disabled selector selects all HTML form
elements that are disabled.
The :enabled selector selects all HTML form
elements that are enabled.
The :file selector selects HTML form input
elements with type=”file”.
The :focus selector selects the element that currently has focus.
The :image selector selects HTML form input
elements with type=”image”.
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