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Dom Set and Get Methods in javascript

 <!DOCTYPE html>

<html>
    <head>
        <title>Dom Set and Get Methods</title>
    </head>
    <body>
        <h1 id="heading">Dom Set and Get Methods</h1>
        <input id="first_name" class="abc efg" name="first_name" value="Adnan" placeholder="Enter First Name..." style="border: 3px solid" onclick="xyz()" />
        <script>

            // How to get the attribute of elements


            // innerHTML: To get the inner html of the element
            // innerText: To get the inner text of the element
            var element  = document.head.innerHTML;
            console.log('Taget DOM Element :'+ element);

            var el  = document.getElementById('heading').innerText;
            console.log('Taget DOM Element :'+ el);

            // getAttribute : basicaly it return us the value of attribute
            // attribute could be id,class,placeholder onclick src etc.
            var ele;
            ele = document.getElementById("first_name").getAttribute("class");
            console.log('Target attribute of DOM Element :'+ ele);
            ele = document.getElementById("first_name").getAttribute("id");
            console.log('Target attribute of DOM Element :'+ ele);
            ele = document.getElementById("first_name").getAttribute("style");
            console.log('Target attribute of DOM Element :'+ ele);
            ele = document.getElementById("first_name").getAttribute("placeholder");
            console.log('Target attribute of DOM Element :'+ ele);
            ele = document.getElementById("first_name").getAttribute("onclick");
            console.log('Target attribute of DOM Element :'+ ele);
           
            // getAttributeNode : It will return us property name with its value e.g onclick="xyz"
            console.log('Target attributeNode of DOM Element');
            ele = document.getElementById("first_name").getAttributeNode("style");
            console.log(ele.value);
            console.log(ele.nodeValue);

            // Attributes : It will return all the attributes inside the purticular element in the form of array.

            ele = document.getElementById("first_name").attributes;
            console.log(ele);

            // if i want to get the perticular object value.
            ele = document.getElementById("first_name").attributes[2];
            console.log(ele); // name = "first_name"
            // To get the vlaue of object attribute.
            ele = document.getElementById("first_name").attributes[3].value;
            console.log(ele); // first_name

            // How to set attributes value of elements.
            // we can change
            /*
            1 innerText
            2 innerHTML
            3 setAttribute
            4 Attribute
            5 removeAttribute


            */

            ele = document.getElementById("heading").innerHTML = "<h2> Setting innerHTML value </h2>"

            // set Attribute value
            /*
            i change  class name here
            */
            ele = document.getElementById("first_name").setAttribute('class','newclass');
            ele = document.getElementById("first_name").getAttribute("class");
            console.log(ele);

            // let change the background color of body tag

            ele = document.body.setAttribute('style','background-color:pink');


            // change value using attribute method

            document.getElementById("first_name").attributes[1].value = "fgh";

            ele = document.getElementById("first_name").getAttribute("class");
           
            console.log(ele);


            // removeAttribute

            ele = document.getElementById("first_name").removeAttribute("class");

            console.log(document.body);

        </script>
    </body>
</html>

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