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JavaScript

Posted by Roland O'Donnell
Roland O'Donnell
5,667 Points

Limiting checkboxes being checked via certain conditions using javascript/jquery

I'm trying to limit the amount of checkboxes able to be checked according to what select option the user chooses i.e. option1 = 1 checkbox option 2 = 2 checkboxes and if they try to choose more then alert the user and .prop("checked", false).

but i just get weird stuff happening am i close or on the right path?

<form>
    <select onclick="systemSelected();" class="mySelectBox">
        <option value="1">option1</option>
        <option value="2">option2</option>
        <option value="3">option3</option>
        <option value="4">option4</option>
        <option value="5">option5</option>
    </select>

</form>

<form onclick="limitCheckbox(userSelected);">
    <input type="checkbox" name="box1">
    <input type="checkbox" name="box2">
    <input type="checkbox" name="box3">
    <input type="checkbox" name="box4">
    <input type="checkbox" name="box5">
</form>

    var userSelected = 0;

function systemSelected() {

$(".mySelectBox option").each(function(){

    if ($(this.selected)) {

        userSelected = parseInt($(".mySelectBox").val());
    }
});
}

function limitCheckbox(userSystem) {

$("input[type=checkbox]").click(function(){

    if($("input[type=checkbox]:checked".length > userSystem)) {

        $(this).prop("checked", false);
        alert("too many numbers");


    } else if ($("input[type=checkbox]:checked".length === 0 )) {

        alert("please select a game too play");
    }
});

}

1 Answer

Jesus Mendoza
Jesus Mendoza
23,289 Points
Jesus Mendoza
Jesus Mendoza
23,289 Points

Hey,

You could do something like this:

let limit = 2;
let checkBoxes = $('input[type="checkbox"]');

checkBoxes.on('click', function() {
   if ($(this).siblings(':checked').length >= limit) {
      $(this).prop('checked', false);
   }
});