Question

I am trying to make a function to check if all checkboxes are unchecked. I have a similar function for text boxes. As I have not worked with checkboxes much before, I’m not sure how to adapt it except for changing input[type=text] to input[type=checkbox].

Can anyone help me out? Thanks.

var textinputs = document.querySelectorAll('input[type=text]'); 
var empty = [].filter.call( textinputs, function( el ) {
     return !el.value
});

    if (textinputs.length == empty.length) {
        alert("None filled");
        return false;
}

Answer 1

The following should do the trick:

var textinputs = document.querySelectorAll('input[type=checkbox]'); 
var empty = [].filter.call( textinputs, function( el ) {
   return !el.checked
});

if (textinputs.length == empty.length) {
    alert("None filled");
    return false;
}