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test.html
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test.html
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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">
<script src="https://cdnjs.cloudflare.com/ajax/libs/html2canvas/1.3.3/html2canvas.min.js"></script>
<title>商品预览图生成器</title>
</head>
<body>
<div class="container">
<div class="input-section">
<label for="productImage">商品图片：</label>
<input type="file" id="productImage" accept="image/*">
<label for="productName">产品名称：</label>
<input type="text" id="productName" placeholder="产品名称">
<label for="productPrice">价格：</label>
<input type="text" id="productPrice" placeholder="价格">
<label for="priceUnit">价格单位：</label>
<input type="text" id="priceUnit" placeholder="价格单位">
<label for="ingredients">配料：</label>
<textarea id="ingredients" placeholder="配料"></textarea>
</div>
<div class="preview-section" id="previewSection">
<img id="previewImage" src="" alt="商品图片">
<div class="price-container">
<span class="price-value" id="previewPrice"></span>
<span class="price-unit" id="priceUnitPreview"></span>
</div>
<h3 id="previewName"></h3>
<h3 id="previewIngredients"></h3>
</div>
<button onclick="downloadImage()">下载预览图</button>
</div>
<script>
document.getElementById('productImage').addEventListener('change', updatePreview);
document.getElementById('productName').addEventListener('input', updatePreview);
document.getElementById('productPrice').addEventListener('input', updatePreview);
document.getElementById('priceUnit').addEventListener('input', updatePreview);
document.getElementById('ingredients').addEventListener('input', updatePreview);
function updatePreview() {
const image = document.getElementById('productImage').files[0];
if (image) {
const reader = new FileReader();
reader.onload = function (e) {
const img = new Image();
img.src = e.target.result;
img.onload = function () {
const canvas = document.createElement('canvas');
const ctx = canvas.getContext('2d');
// 计算新的高度，保持原始宽高比
const newWidth = 400;
const newHeight = (img.height / img.width) * newWidth;
// 设置canvas的大小
canvas.width = newWidth;
canvas.height = newHeight;
// 将图片绘制到canvas上
ctx.drawImage(img, 0, 0, newWidth, newHeight);
// 将canvas的内容设置为预览图片的源
document.getElementById('previewImage').src = canvas.toDataURL();
};
};
reader.readAsDataURL(image);
} else {
document.getElementById('previewImage').src = ""; // 清除预览图片
}
// 产品名称
if (document.getElementById('productName').value) {
document.getElementById('previewName').innerText = "产品名称：" + document.getElementById('productName').value;
} else {
document.getElementById('previewName').innerText = "";
}
const priceValue = document.getElementById('productPrice').value;
const priceUnitValue = document.getElementById('priceUnit').value;
const priceContainer = document.querySelector('.price-container');
// 价格
if (priceValue) {
document.getElementById('previewPrice').innerText = "￥" + priceValue;
} else {
document.getElementById('previewPrice').innerText = "";
}
// 价格单位
if (priceUnitValue) {
document.getElementById('priceUnitPreview').innerText = " / " + priceUnitValue;
} else {
document.getElementById('priceUnitPreview').innerText = "";
}
// 如果价格或价格单位为空，则隐藏整个price-container
if (!priceValue || !priceUnitValue) {
priceContainer.style.display = 'none';
} else {
priceContainer.style.display = 'block';
}
// 配料
if (document.getElementById('ingredients').value) {
document.getElementById('previewIngredients').innerText = "配料：" + document.getElementById('ingredients').value;
} else {
document.getElementById('previewIngredients').innerText = "";
}
}
function downloadImage() {
const previewSection = document.getElementById('previewSection');
html2canvas(previewSection).then(canvas => {
const link = document.createElement('a');
link.href = canvas.toDataURL('image/png');
link.download = 'product-preview.png';
link.click();
});
}
</script>
<style>
body {
font-family: Arial, sans-serif;
margin: 20px;
}
.container {
display: flex;
flex-direction: column;
align-items: center;
}
label {
display: block;
margin-top: 10px;
margin-bottom: 5px;
}
.input-section {
border: 1px solid #ccc;
/* padding: 20px; */
margin: 10px;
width: 80%;
box-sizing: border-box;
}
.preview-section {
/* border: 1px solid #ccc; */
/* padding: 20px; */
/* margin: 10px; */
/* width: 80%; */
background-color: rgb(247, 247, 247);
box-sizing: border-box;
}
input,
textarea {
width: 100%;
padding: 10px;
margin: 10px 0;
box-sizing: border-box;
}
button {
padding: 10px 20px;
background-color: #007BFF;
color: #fff;
border: none;
cursor: pointer;
}
button:hover {
background-color: #0056b3;
}
.price-container {
/* display: inline-flex; */
/* background: linear-gradient(to right, deepskyblue, gold); */
padding: 20px 20px;
border-radius: 5px;
align-items: center;
flex-direction: column;
}
#previewIngredients,
#previewName {
padding: 0px 20px;
}
.price-value,
.price-unit {
color: white;
padding: 7px 15px;
}
.price-value {
background-color: rgb(43, 53, 65);
border-top-left-radius: 5px;
border-bottom-left-radius: 5px;
}
.price-unit {
background-color: gold;
border-top-right-radius: 5px;
border-bottom-right-radius: 5px;
}
</style>
</body>
</html>