clearRect function doesn't clear the canvas
问题 I\'m using this script on the body onmousemove function: function lineDraw() { // Get the context and the canvas: var canvas = document.getElementById(\"myCanvas\"); var context = canvas.getContext(\"2d\"); // Clear the last canvas context.clearRect(0, 0, canvas.width, canvas.height); // Draw the line: context.moveTo(0, 0); context.lineTo(event.clientX, event.clientY); context.stroke(); } It\'s supposed to clear the canvas each time I move the mouse around, and draw a new line, but it isn\'t