Attribute example in JavaScript

 setAttribute using Function()

-- example 1 --

<input value="OK" onclick="myVal()"disabled >

    <button onclick="myFunction()">Try it</button>

script>

        function myFunction(x) {

            document.getElementsByTagName("INPUT")[0].setAttribute("type", "button");

            document.getElementsByTagName("INPUT")[0].disabled = false;

        }

        function myVal() {

            alert('This is button')

        }

    </script>

-- example 2 --

<button id="btnSend">Send</button>

   

    <script>

        let btnSend = document.querySelector('#btnSend');

        if (btnSend) {

            //btnSend.setAttribute('name', 'send');

            //btnSend.setAttribute('disabled', '');

            //alert('This is work automatically');

            //btnSend.setAttribute("style", "background-color: red;");

        }

    </script>

getAttribute

-- example --