javascript-course/09-dom-project.html at main · AnthonyHu05/javascript-course · GitHub

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<!DOCTYPE html>
<html>
    <head>
        <title>DOM Project</title>
        <style>
            body{
                font-family: Arial;
            }
            .subscribe-button{
                border: none;
                background-color: black;
                color: white;
                padding-bottom: 10px;
                padding-top: 10px;
                padding-left: 15px;
                padding-right: 15px;
                font-weight: bold;
                border-radius: 50px;
                cursor:pointer;
                margin-bottom: 30px ;
            }
            .is-subscribed{
                background-color: rgb(240,240,240);
                color: black;
            }
            .cost-input{
                font-size: 15px;
                padding:10px;
            }
            .calculate-button{
                background-color: green;
                color: white;
                border: none;
                font-size: 15px;
                padding: 12px 15px;
                cursor: pointer;
            }
        </style>
    </head>
    <body>
        <p>Youtube Subscribe Button</p>
        <button onclick="
            subscribe();
        " class="js-subscribe-button subscribe-button">
            Subscribe</button>
        <p>Amazon Shipping Calculator</p>
        <input placeholder="Cost of order" class="js-cost-input cost-input" onkeydown="
            handleCostKeyDown(event);
        ">
        <button onclick="
            calculateTotalCost();
        " class="calculate-button">Calculate</button>
        <p class="js-total-cost"></p>
        <script>
            function handleCostKeyDown(event){
                if(event.key==='Enter'){
                calculateTotalCost();
            }
            }
            function calculateTotalCost(){
                const inputElement=document.querySelector('.js-cost-input')
                let cost=Number(inputElement.value);
                if(cost<40){
                    cost+=10;
                }
                document.querySelector('.js-total-cost').innerHTML=`$${cost}`
            }
            function subscribe(){
                const buttonElement = document.querySelector('.js-subscribe-button');
                if(buttonElement.innerText==='Subscribe'){
                    buttonElement.innerText='Subscribed';
                    buttonElement.classList.add('is-subscribed');
                }
                else{
                    buttonElement.innerText='Subscribe';
                    buttonElement.classList.remove('is-subscribed');
                }
            }
        </script>
    </body>
</html>