I am using <em>fabric</em><em>js</em> 1.5 and I am stuck on 1 thing. I want to show the preview of the canvas to the user on click of button and I can not come up with a proper solution. Some things that crossed my mind are:
Save the current canvas state and then render it on the other canvas
Create a temporary image save function and then show this image
But I want to know if there is any specific function in the <em>fabric</em><em>js</em> that can help me achieve this. I did some R&D and could not find anything and hence I have not tried anything.
使用Fabric.<em>js</em>循环添加图片，总是堆叠在一起。
代码如下：
```
var canvas = new <em>fabric</em>.Canvas("myPanel");
for (var i = 0; i < 5; i++) {
var myLeft = i * 100;
<em>fabric</em>.Image.fromURL("Images/PC.png", function (oImg) {
oImg.left = myLeft;
oImg.top = 400,
canvas.add(oImg);
});
```
发现这5张图片的left都是按照i=4的时候计算的，显示以后全部重合，请教一下这个情况是怎么回事儿？
因为快要毕业设计开题了，大概找的方向需要用到canvas画图，但是画起来real麻烦，就找呀找，发现了Fabric.<em>js</em>，然后就开始学习，发现了胜洪宇老师的教程，做了一下学习笔记，敲了一下代码放在了github上，欢迎大家参考～～
GitHub地址：https://github.com/YZlingyu/<em>fabric</em>.<em>js</em>
Fabric官网地址：http://<em>fabric</em><em>js</em>.com
Fab
