<canvas a:if="{{isRunCanvas}}" class="canvas" id="{{canvasId}}" type="webgl" style="width:{{targetWidth}}rpx;height:{{targetHeight}}rpx" onTouchStart="onTouchHandle" onTouchEnd="onTouchHandle" onTouchMove="onTouchHandle" onTouchCancel="onTouchHandle" onReady="onCanvasReady"></canvas>