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melanke / Watch.JS

watch the changes of any object or attribute
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Uncaught TypeError: Cannot set property 'x' of undefined #128

Closed noisiak closed 6 years ago

noisiak commented 6 years ago

Hello. I just got this error and I am not sure what is causing it. I am working with the Three.js library.

It happens when I watch for the "position" attribute from my object. The position attribute it's a vector with 3 properties (x,y,z).

The error happens after I call this: watch(object, "position", function(){ // console.log("object changed!"); });

Any idea of what could be the cause of this error?

Here is the log:

screen shot 2018-09-23 at 23 14 15

Curiously, the watcher itself does work as intended, so I not sure why the error is happening.

swindex commented 6 years ago

Should be watching properties of HTML elements and other non-plain objects?

noisiak commented 6 years ago

Not really. I just need it to watch the "position" of the "object".

noisiak commented 6 years ago

I found the reason: you need to give the full path of property: object.position, instead of just "position"