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JavaScript Simple Form and DOM
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
| <meta http-equiv="X-UA-Compatible" content="ie=edge"> | |
| <link rel="stylesheet" href="style.css"> | |
| <title>JS Crash Course</title> | |
| </head> | |
| <body> | |
| <header> | |
| <h1>JS Crash Course</h1> | |
| </header> | |
| <section class="container"> | |
| <form id="my-form"> | |
| <h1>Add User</h1> | |
| <div class="msg"></div> | |
| <div> | |
| <label for="name">Name:</label> | |
| <input type="text" id="name"> | |
| </div> | |
| <div> | |
| <label for="email">Email:</label> | |
| <input type="text" id="email"> | |
| </div> | |
| <input class="btn" type="submit" value="Submit"> | |
| </form> | |
| <ul id="users"></ul> | |
| <ul class="items"> | |
| <li class="item">Item 1</li> | |
| <li class="item">Item 2</li> | |
| <li class="item">Item 3</li> | |
| </ul> | |
| </section> | |
| <!-- put JS at the bottom, allow DOM to finish loading first --> | |
| <script src="main.js"> | |
| // embedded JS | |
| </script> | |
| </body> | |
| </html> |
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| // ------ working with the UL in comment ------- | |
| // const ul = document.querySelector('.items'); | |
| // ul.remove(); | |
| // ul.lastElementChild.remove(); | |
| // ul.firstElementChild.textContent = 'Hello World'; | |
| // ul.children[1].innerText = 'Dome Potikanond'; | |
| // ul.lastElementChild.innerHTML = '<h1>The Last Item</h1>'; | |
| // --- What to do when clicking the button? --- | |
| // btn.addEventListener('click', (e) => { | |
| // e.preventDefault(); // prevent the default submit input behavior (no refresh) | |
| // // ---- playing ---- | |
| // // console.log('click'); | |
| // // console.log(e); | |
| // // console.log(e.target); | |
| // // console.log(e.target.value); | |
| // // document.querySelector('#my-form').style.background = '#ccc'; | |
| // // document.querySelector('body').classList.add('bg-dark'); | |
| // // document.querySelector('.items').lastElementChild.innerHTML = '<h2> Submit button is clicked! </h2>'; | |
| // }); | |
| const myForm = document.querySelector('#my-form'); | |
| const nameInput = document.querySelector('#name'); | |
| const emailInput = document.querySelector('#email'); | |
| const msg = document.querySelector('.msg'); | |
| const userList = document.querySelector('#users'); | |
| myForm.addEventListener('submit', onSubmit); | |
| function onSubmit(e) { | |
| e.preventDefault(); | |
| //console.log(nameInput.value); | |
| if (nameInput.value === '' || emailInput === '') { | |
| // alert('Please enter all fields.'); | |
| msg.classList.add('error'); | |
| msg.innerHTML = 'Please enter all fields'; | |
| setTimeout( () => msg.remove(), 3000); // remove msg in 3 seconds | |
| // setTimeout( () => { | |
| // msg.classList.toggle('error'); | |
| // msg.innerHTML = '' | |
| // }, 3000); // remove msg in 3 seconds | |
| // nameInput.focus(); | |
| } else { | |
| // console.log('success'); | |
| const li = document.createElement('li'); | |
| li.appendChild(document.createTextNode(`${nameInput.value} : ${emailInput.value}`)); | |
| userList.appendChild(li); | |
| // clear fields | |
| nameInput.value = ''; | |
| emailInput.value = ''; | |
| } | |
| } |
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| * { | |
| margin: 0; | |
| padding: 0; | |
| box-sizing: border-box; | |
| } | |
| body { | |
| font-family: Arial, Helvetica, sans-serif; | |
| line-height: 1.6; | |
| } | |
| ul { | |
| list-style: none; | |
| } | |
| ul li { | |
| padding: 5px; | |
| background: #f4f4f4; | |
| margin: 5px 0; | |
| } | |
| header { | |
| background: #f4f4f4; | |
| padding: 1rem; | |
| text-align: center; | |
| } | |
| .container { | |
| margin: auto; | |
| width: 500px; | |
| overflow: auto; | |
| padding: 3rem 2rem; | |
| } | |
| #my-form { | |
| padding: 2rem; | |
| background: #f4f4f4; | |
| } | |
| #my-form label { | |
| display: block; | |
| } | |
| #my-form input[type='text'] { | |
| width: 100%; | |
| padding: 8px; | |
| margin-bottom: 10px; | |
| border-radius: 5px; | |
| border: 1px solid #ccc; | |
| } | |
| .btn { | |
| display: block; | |
| width: 100%; | |
| padding: 10px 15px; | |
| border: 0; | |
| background: #333; | |
| color: #fff; | |
| border-radius: 5px; | |
| margin: 5px 0; | |
| } | |
| .btn:hover { | |
| background: #444; | |
| } | |
| .bg-dark { | |
| background: #333; | |
| color: #fff; | |
| } | |
| .error { | |
| background: orangered; | |
| color: #fff; | |
| padding: 5px; | |
| margin: 5px; | |
| } |
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