js实现webp转png/jpg
网上保存的图片是webp类型的，但是我把它嵌入flac格式的音频里后导致网页中无法播放
wps要会员，真麻烦。
完整代码：
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>WebP to PNG Converter</title>
<style> .input-area { margin-bottom: 10px; } .output-area { margin-top: 10px; }
</style>
</head>
<body> <div class="input-area"> <input type="file" id="webp-input" accept=".webp" onchange="javascript:preview()" /><div id="img-preview"></div><button onclick="convertWebp('image/png')">转换成png</button><button onclick="convertWebp('image/jpg')">转换成jpg</button>
</div> <div class="output-area" id="output-area"> <!-- 下载链接将在这里动态生成 -->
</div> <script>
function preview(){const imgContent = document.getElementById('img-preview');const file = document.getElementById("webp-input").files[0];imgContent.innerHTML = '';const img = document.createElement('img');img.src = URL.createObjectURL(file);imgContent.appendChild(img);img.onload = function() {URL.revokeObjectURL(this.src);}
}
function convertWebp(mimeType) { const inputElement = document.getElementById('webp-input'); const file = inputElement.files[0]; if (!file) { alert('Please select a WebP file first.'); return; } const reader = new FileReader(); reader.onload = function(event) { const img = new Image(); img.onload = function() { const canvas = document.createElement('canvas'); canvas.width = img.width; canvas.height = img.height; const ctx = canvas.getContext('2d'); ctx.drawImage(img, 0, 0, img.width, img.height); const pngUrl = canvas.toDataURL(mimeType); const link = document.createElement('a'); link.href = pngUrl;if(mimeType === 'image/png'){link.download = 'converted.png'; }else if(mimeType === 'image/jpg'){link.download = 'converted.jpg';}document.getElementById('output-area').appendChild(link); link.click(); // 触发下载 }; img.src = event.target.result; }; reader.readAsDataURL(file);
}
</script> </body>
</html>