in this tutorial, you will learn how to use JavaScript to check if a checkbox is checked and how to get values of selected checkboxes.

The Input Checkbox object represents an HTML <input> element with type="checkbox". You can access an <input> element with type="checkbox" by using getElementById (): Tip: You can also access <input type="checkbox"> by searching through the collection of a form.

Check whether a checkbox is checked with JavaScript. Display some text when the checkbox is checked: Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.

Sep 11, 2020 · This blog entry recorded the best free JavaScript/JS checkbox example. In this post, I have given you many checkbox examples that are one of a kind, unique, current, and cool. Attempt these awesome checkboxes, and your clients will adore them!

Jan 12, 2021 · Example: function toggle(checked) { var elm = document.getElementById('checkbox'); if (checked != elm.checked) { elm.click(); } } Read more about the click method here: https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/click

Example Use a checkbox to convert text in an input field to uppercase: document.getElementById("fname").value = document.getElementById("fname").value.toUpperCase();

Dec 22, 2008 · JavaScript is your best bet. The link below gives an example using buttons to de/select all. You could try to adapt it to use a check box, just use you 'select all' check box' onClick attribute. Javascript Function to Check or Uncheck all Checkboxes. This page has a simpler example. http://www.htmlcodetutorial.com/forms/_INPUT_onClick.html

We can do this using JavaScript, no need of jQuery. Just pass the changed element and let JavaScript handle it. HTML. syn<input type="checkbox" name="checkfield" id="g01-01" onchange="doalert(this)"/> JS. if (checkboxElem.checked) { alert …

Apr 10, 2025 · In this example we keep track of the ingredients we are collecting for a recipe. When you check or uncheck an ingredient's checkbox, a JavaScript function checks the total number of checked ingredients: If none are checked, the recipe name's checkbox is set to unchecked. If one or two are checked, the recipe name's checkbox is set to indeterminate.

In this lesson, we shall learn how to write code for the JavaScript checkbox. Checkboxes are differently from radio buttons. While radio buttons only allow the user to select one option at a time, checkboxes allow the users to select multiple options.