JavaScript/colors.html at main · AnshumanSinghh/JavaScript · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Colors!</title>
    <script>
        document.addEventListener("DOMContentLoaded", () => {

            // for changing font color
            document.querySelectorAll('button').forEach(button => {  // forEach() button run button.onclick function.
                button.onclick = function() {
                document.querySelector('h1').style.color = button.dataset.color;  // to acces the data attribute property we use button.dataset
                                                                                  // and for data-color use button.dataset.color.
                }
            });


            // for selectors
            document.querySelector('select').onchange = function() {
                document.querySelector('h2').style.color = this.value;  // here this is for document.querySelector('select')
                // this always refers to the thing that received the event and here it was select drop-down.
                console.log(this.value);
            }
        });
    </script>
</head>
<body>
    <h1>COLORS!!</h1>
    <button data-color="green">Green</button>
    <button data-color="skyblue">SkyBlue</button>
    <button data-color="red">Red</button>

    <h2>SELECTORS!!</h2>
    <select name="color" id="color">
        <option value="black">Black</option>
        <option value="green">Green</option>
        <option value="blue">Blue</option>
        <option value="red">Red</option>
    </select>
</body>
</html>