How to implement “select all” check box in HTML?

Question

I have an HTML page with multiple checkboxes.

I need one more checkbox by the name \"select all\". When I select this checkbox all checkboxes in the HTML page must b

Answer 1

I'm surprised no one mentioned document.querySelectorAll(). Pure JavaScript solution, works in IE9+.

function toggle(source) {
    var checkboxes = document.querySelectorAll('input[type="checkbox"]');
    for (var i = 0; i < checkboxes.length; i++) {
        if (checkboxes[i] != source)
            checkboxes[i].checked = source.checked;
    }
}

Check all?


Bar 1

Bar 2

Bar 3

Bar 4