How to make JavaScript universal

Hi reader . My removeAttribute code works in chromium browsers but not in MS edge can you tell me how I can make my code more universal.

Here is the code


<!DOCTYPE html>
<html lang="en">

    <meta charset="UTF-8">
    <title>Shipping and Billing</title>
        input {
            border: 1px solid black;

        input:focus {
            background-color: #E6E6E6;

        fieldset {
            margin-bottom: 4%;

    <script src="js.js"></script>

    <h1>JavaScript Homework</h1>
    <p>Add the JavaScript code needed to enable auto-complete on this form. Whenever the checkbox is checked, the code should automatically copy the values from Shipping Name and Shipping Zip into the Billing Name and Billing Zip. If the checkbox is unchecked, the Billing Name and Billing Zip should go blank.</p>

            <legend>Shipping Information</legend> <label for="shippingName">Name:</label> <input type="text" name="Name" id="shippingName" required><br />

            <label for="shippingzip">Zip code:</label> <input type="text" name="zip" id="shippingZip" pattern="[0-9]{5}" required><br />

        <input type="checkbox" id="same" name="same" onchange="billingFunction()" />
        <label for="same">Is the Billing Information the Same?</label>

            <legend>Billing Information</legend> <label for="billingName">Name:</label> <input type="text" name="Name" id="billingName" required><br />

            <label for="billingzip">Zip code:</label> <input type="text" name="zip" id="billingZip" pattern="[0-9]{5}" required><br />

        <input type="submit" value="Verify" />



function billingFunction() {
    if (document.getElementById('same').checked) {
        var si = document.getElementById('shippingName');
        var sz = document.getElementById('shippingZip');

        document.getElementById('billingName').setAttribute("value", si.value);
        document.getElementById('billingZip').setAttribute("value", sz.value);

    } else {

You don’t need to remove value attribute, just assign it to empty string:

document.getElementById('billingName').value = '';

Thanks it worked.
But why did the removeAttribute version of the didn’t work for MS edge?

In w3schools it says it is supported in edge .

It surely works for custom or non-essential attributes, but deleting value attribute from input is like removing engine from the car, I’m really surprised Chrome allowed you to do so…

Ok got it. Thanks for the help.