未捕获的TypeError：尝试读取JointJS Hello World示例时，无法读取未定义的属性“ push”

Question

I'm trying to get the JointJS 'Hello World' example to work

Reference: https://resources.jointjs.com/tutorial/hello-world

The dependencies are all loaded in the correct order but I can't get around the following exception: Uncaught TypeError: Cannot read property 'push' of undefined when trying to run the example.

I realize that Backbone requires underscore but I read in a different article that Backbone 1.3.3 should be compatible with Lodash. When I do include underscore it seems to conflict with lodash (which jointjs requires). eg. '_.create is not defined'.

I've tried a multitude of different versions to no avail.

Here's a jsfiddle where I'm trying to get it to work in.

https://jsfiddle.net/0mdg8xja/1/

What am I doing wrong and how can I get around this exception in this scenario?

Answer 1

I came to the idea of looking up existing JSFiddles and stumbled upon this one:

https://jsfiddle.net/robertrozas/gfaL9ype/

I compared the hello world example to this one and it appears that the only thing I was missing was the fact that I had to wrap the javascript inside:

$(function(){ });

This seems to work regardless of what versions I use. I tested it on JointJS 0.9.7 and 1.1.0 , backbone 1.1 , 1.3.3 and lodash 3.10.1 .

Here's the updated JSFiddle for if anyone stumbled upon the same foreheadsmacker as I did.

https://jsfiddle.net/gfaL9ype/30/