“How to check if checkbox is checked javascript” refers to a coding technique to determine the state of a checkbox element in a web form using JavaScript. When a checkbox is checked, it indicates that a user has selected or enabled a particular option. Checking the state of a checkbox is essential for processing user input, handling form submissions, and validating data in web applications.
JavaScript provides various methods to check the checked state of a checkbox. The most straightforward approach is to use the `checked` property of the checkbox element. When checked, this property returns `true`; otherwise, it returns `false`. Additionally, the `indeterminate` property can be used to check if a checkbox is in an indeterminate state, which occurs when the checkbox is neither checked nor unchecked.