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前端页面中使用 ppt 功能，并且可以随意插入关键帧

article 2024/9/20 4:04:07

要在前端页面中实现类似 PowerPoint 的功能，并且能够随意插入和控制关键帧动画，你可以使用 HTML、CSS 和 JavaScript 结合的方式来创建一个互动幻灯片系统。以下是一个详细的实现方案，包括如何插入和控制关键帧动画：

1. 基础 HTML 和 CSS 结构

首先，创建一个基本的 HTML 页面结构，用于展示幻灯片和按钮。

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Interactive Presentation with Keyframes</title>
    <link rel="stylesheet" href="styles.css">
</head>
<body>
    <div class="presentation">
        <div class="slide" id="slide1">
            <h1>Slide 1</h1>
            <p>This is the content for slide 1.</p>
        </div>
        <div class="slide" id="slide2">
            <h1>Slide 2</h1>
            <p>This is the content for slide 2.</p>
        </div>
        <!-- Add more slides as needed -->
    </div>
    <button onclick="prevSlide()">Previous</button>
    <button onclick="nextSlide()">Next</button>
    <script src="script.js"></script>
</body>
</html>

/* styles.css */
body {
    font-family: Arial, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0;
}

.presentation {
    width: 80%;
    height: 60%;
    position: relative;
    overflow: hidden;
}

.slide {
    display: none;
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    background: #f0f0f0;
    padding: 20px;
    box-sizing: border-box;
    transition: opacity 1s ease-in-out;
}

.slide.active {
    display: block;
}

2. JavaScript 实现幻灯片切换和关键帧动画

通过 JavaScript 实现幻灯片的切换，并插入和控制关键帧动画。

// script.js
let currentSlide = 0;
const slides = document.querySelectorAll('.slide');

function showSlide(index) {
    slides.forEach((slide, i) => {
        slide.classList.toggle('active', i === index);
    });
}

function nextSlide() {
    currentSlide = (currentSlide + 1) % slides.length;
    showSlide(currentSlide);
}

function prevSlide() {
    currentSlide = (currentSlide - 1 + slides.length) % slides.length;
    showSlide(currentSlide);
}

// Initialize the first slide
showSlide(currentSlide);

// Function to dynamically add keyframe animation
function addKeyframeAnimation(element, animationName, keyframes) {
    const styleSheet = document.createElement('style');
    styleSheet.type = 'text/css';
    const keyframesCSS = `
        @keyframes ${animationName} {
            ${keyframes}
        }
    `;
    styleSheet.innerText = keyframesCSS;
    document.head.appendChild(styleSheet);
    element.style.animation = `${animationName} 2s ease-in-out`;
}

// Example usage: Add an animation to a specific slide
const slide1 = document.getElementById('slide1');
addKeyframeAnimation(slide1, 'fadeIn', '0% { opacity: 0; } 100% { opacity: 1; }');

const slide2 = document.getElementById('slide2');
addKeyframeAnimation(slide2, 'zoomIn', '0% { transform: scale(0.5); opacity: 0; } 100% { transform: scale(1); opacity: 1; }');