#Java script input box how to#
#Java script input box code#

appendChild( checkbox) Code language: CSS ( css )ĥ) Create a text node and append it to the label: label. tAttribute( 'for', id) Code language: JavaScript ( javascript )ģ) Create a checkbox: const checkbox = document.createElement( 'input') Ĭheckbox.id = id Code language: JavaScript ( javascript )Ĥ) Place the checkbox inside the label: label. If you select one or more checkboxes and click the button, it’ll show the values of the selected checkbox: JavaScript Checkboxes Select your favorite colors: Red Green Blue Get Selected Colors const btn = document.querySelector( '#btn') ītn.addEventListener( 'click', (event) => ` Code language: JavaScript ( javascript )Ģ) Create a label and assign the id to the for attribute: const label = document.createElement( 'label') The following page shows three checkboxes. Getting values of multiple selected checkboxes When you get the value attribute of a checkbox, you always get the 'on' string whether the checkbox is checked or not. Submit const cb = document.querySelector( '#accept') Ĭonst btn = document.querySelector( '#btn') When you click the button, you’ll see the checkbox’s value on the console window: JavaScript Checkbox Accept The following page shows a checkbox and a button. On the console window, you’ll see the value false because the checkbox is unchecked: false Code language: JavaScript ( javascript ) Getting checkbox values Therefore, if the checkbox element with the id #accept is checked, the document.querySelector() will return it. For example, it matches the following element: Accept Code language: HTML, XML ( xml )īut not this one: Accept Code language: HTML, XML ( xml )

In this example, the selector #accept:checked selects the element with the id #accept and has the attribute checked. const checked = document.querySelector( '#accept:checked') != null Ĭonsole.log(checked) // false Code language: HTML, XML ( xml ) Second, select the checkbox with id #accept and examine the checked property: const cb = document.querySelector( '#accept') Ĭonsole.log(cb.checked) Code language: JavaScript ( javascript )īecause the checkbox is unchecked, you’ll see false in the console: false Code language: JavaScript ( javascript )Ĭonsider another example: JavaScript Checkbox Accept const cb = document.querySelector( '#accept') Ĭonsole.log(cb.checked) // false Code language: HTML, XML ( xml )įirst, create the HTML checkbox element: Accept See the following example: JavaScript Checkbox Accept If its checked property is true, then the checkbox is checked otherwise, it is not. Then, access the checked property of the checkbox element.First, select the checkbox using a DOM method such as getElementById() or querySelector().To get the state of a checkbox, you follow these steps: The following works but is bad practice so you should avoid it: Accept Code language: HTML, XML ( xml ) Checking if a checkbox is checkedĪ checkbox has two states: checked and unchecked. Note that the for attribute’s value of the label must match the id of the checkbox. Or: Accept Code language: HTML, XML ( xml ) By doing this, clicking the label also checks or unchecks the checkbox. It’s a good practice to always associate a checkbox with a label to improve usability and accessibility. To create a checkbox, you use the element with the type of checkbox as follows: Accept Code language: HTML, XML ( xml )

#Java script input box how to#

Summary: in this tutorial, you will learn how to use JavaScript to test if a checkbox is checked, get the values of selected checkboxes, and select/unselect all checkboxes.