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[EX-17.11/st-compl] cr-adding-obj-to-localStorage
Creating "obj/message", adding it to "localStorage". Worth noting: - importance of using the "JSON.stringify()" method. FS-dev: B-3 / JS basic
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‎full-stack-dev/3-js-basic/17-dom/17-11-ex-creating-adding-obj-to-localStorage/index.html‎

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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta http-equiv="X-UA-Compatible" content="IE=edge">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>DOM</title>
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<link rel="stylesheet" href="./styles.css">
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<script src="./index.js" defer></script>
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</head>
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<body style="background-color: #1c1b21; text-align: center">
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<img src="./logo.svg" alt>
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<div class="panel">I love this!</div>
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<div class="input-wrap">
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<input class="input" id="input">
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<button class="button">Change</button>
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</div>
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<div class="notification notification_hide">Changed!</div>
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<div class="new-panel panel"></div>
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</body>
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</html>

‎full-stack-dev/3-js-basic/17-dom/17-11-ex-creating-adding-obj-to-localStorage/index.js‎

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'use strict';
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const panelMessage = document.querySelector('.panel');
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const input = document.querySelector('.input');
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const button = document.querySelector('.button');
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const notificationMessage = document.querySelector('.notification');
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let notificationTimer; // переменная для хранения ID таймера
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// DRY
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function changeMessage() {
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const inputValue = input.value;
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if (!inputValue) {
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return;
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}
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panelMessage.textContent = inputValue;
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input.value = '';
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notificationMessage.classList.remove('notification_hide');
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const messageObj = {
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text: inputValue,
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};
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// добавление в localStorage
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localStorage.setItem('Message', JSON.stringify(messageObj));
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// очищение предыдущего таймер
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clearTimeout(notificationTimer);
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// установка нового таймера (занесение в переменную для ID таймера)
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notificationTimer = setTimeout(() => {
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notificationMessage.classList.add('notification_hide');
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}, 1000);
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}
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// изменение сообщения через "click" по кнопке
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function changeMessageByClick() {
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changeMessage();
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}
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button.addEventListener('click', changeMessageByClick);
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// изменение сообщения через "keydown/Enter" в поле input
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function changeMessageByKeydown(event) {
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// без объекта event не обойтись, т.к. в нём определяем code кнопки.. "Enter"
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if (event.code === 'Enter') {
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changeMessage();
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}
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}
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input.addEventListener('keydown', changeMessageByKeydown);
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// создание/добавление "нового" Html элемента/узла
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const newPanel = document.querySelector('.new-panel');
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const message = document.createElement('p');
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message.classList.add('panel-message');
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message.setAttribute('id', 'panel-message');
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message.textContent = 'Lets do it!';
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newPanel.append(message);

‎full-stack-dev/3-js-basic/17-dom/17-11-ex-creating-adding-obj-to-localStorage/logo.svg‎

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‎full-stack-dev/3-js-basic/17-dom/17-11-ex-creating-adding-obj-to-localStorage/styles.css‎

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.panel {
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margin-bottom: 20px;
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border-radius: 10px;
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padding: 40px;
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font-size: 18px;
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color: white;
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background: rgba(255, 255, 255, .05);
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}
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.input-wrap {
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margin-bottom: 20px;
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}
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.input {
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border: 1px solid rgba(212, 212, 212, .05);
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border-radius: 10px;
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padding: 15px 16px;
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height: 56px;
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box-sizing: border-box;
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font-size: 18px;
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line-height: 21px;
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color: white;
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box-shadow: none;
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outline: none;
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background: rgba(255, 255, 255, .05);
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}
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.button {
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display: inline-flex;
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justify-content: center;
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align-items: center;
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border: none;
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border-radius: 10px;
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padding: 20px 40px;
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box-sizing: border-box;
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text-align: center;
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color: white;
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background: #6c38cc;
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cursor: pointer;
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transition: all .2s;
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}
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.button:hover {
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background-color: #844fe6;
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}
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.notification {
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margin-bottom: 20px;
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font-size: 16px;
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color: white;
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}
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.notification_hide {
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display: none;
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}
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.panel-message {
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margin: 0;
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}

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