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Html – Change the value of a checkbox using a Java script

can I change the value of a checkbox using a Java script in the DOM of the browser page?

It is necessary that the value remains the next time the form is loaded.

I tried several methods, but it only worked to visually check the box. When you clicked again, the checkbox was updated to a real one, and when submitting the form, a message was displayed that there was no checkmark at all

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2

Answers


  1. 0

    did you try using an if statement to check/change the value?

    something like this could work:

    var checkB = document.getElementsByClassName("Checkbox-input");

if (checkB.checked == true){
checkB.value = 0;
} else if (checkB.checked == false){
checkB.value = 1;
}

    (i just used 0 and 1 as an example)

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  2. 0

    You want to be able to set the checkbox. Here’s a function that I named toggle which receives a checkbox element and a value and if the value is 'checked' then it checks the checkbox, otherwise it unchecks it.

    function toggle(context, value) {
    context.checked = (value === "checked");
}
    <input type="checkbox" id="foo">
<select onchange="toggle(document.getElementById('foo'), this.value)">
    <option value="unchecked">unchecked</option>
    <option value="checked">checked</option>
</select>

    So, when you load your form and it gets clear what to do with the checkbox, just trigger toggle with the right parameters.

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