added example of component mutating an already rendered property

[GavinJoyce]

[GavinJoyce]

Here's a nice tip from Kris Selden:

---

For this issue, here's how it helps:

1. Put a breakpoint in assertNotRendered and note the key:

2. Put a conditional breakpoint with the same key in didRender:

3. Reload the app and you'll break at the original place where the value was first rendered:

4. Navigate up the stack until to the currently executing opcode, you can determine the template from this information:

[bstro]

What do you mean by "navigate...to the currently executing opcode" ?

[GavinJoyce]

@bstro these are a little out of date, but should still help:

https://www.youtube.com/watch?v=vL8sCi1Bv6E&index=1&list=PLpAr6J-75N27wctNT70O0lubaGTPjwi1L

https://www.youtube.com/watch?v=l2nD1IxjHUI