Vue を使用して画像シミュレーションとフィルター処理を実装するにはどうすればよいですか?

methods: { applyFilter: function(imageUrl, filter) { // 创建一个canvas元素 var canvas = document.createElement('canvas'); var ctx = canvas.getContext('2d'); // 加载图片 var image = new Image(); image.src = imageUrl; image.onload = function() { // 设置canvas元素的大小 canvas.width = image.width; canvas.height = image.height; // 将图像绘制到canvas上 ctx.drawImage(image, 0, 0); // 根据滤镜选项对图像进行处理 if (filter === 'grayscale') { // 灰度滤镜 var imageData = ctx.getImageData(0, 0, canvas.width, canvas.height); var data = imageData.data; for (var i = 0; i < data.length; i += 4) { var grayscale = data[i] * 0.2126 + data[i + 1] * 0.7152 + data[i + 2] * 0.0722; data[i] = grayscale; data[i + 1] = grayscale; data[i + 2] = grayscale; } ctx.putImageData(imageData, 0, 0); } else if (filter === 'sepia') { // 棕褐色滤镜 var imageData = ctx.getImageData(0, 0, canvas.width, canvas.height); var data = imageData.data; for (var i = 0; i < data.length; i += 4) { var r = data[i]; var g = data[i + 1]; var b = data[i + 2]; data[i] = r * 0.393 + g * 0.769 + b * 0.189; data[i + 1] = r * 0.349 + g * 0.686 + b * 0.168; data[i + 2] = r * 0.272 + g * 0.534 + b * 0.131; } ctx.putImageData(imageData, 0, 0); } // 获取滤镜处理后的图像URL var filteredImageUrl = canvas.toDataURL(); // 更新filteredImageUrl属性，触发计算属性的重新计算 this.$set(this, 'filteredImageUrl', filteredImageUrl); } } }