不太行，本地和服务器对不上了，应该就是服务器速率限制导致的吧，
亏我特地写个脚本想拖动画画，结果一刷新就没了，
var canvas = document.getElementById("myCanvas");
var isMouseDown = false;

document.addEventListener('mousedown', function (e) {
isMouseDown = true;
});

document.addEventListener('mousemove', function (e) {
if (isMouseDown) {
canvas.onmousedown(e);canvas.onclick(e);
}
});

document.addEventListener('mouseup', function () {
isMouseDown = false;
});