not working in IE10 about arbor HOT 4 OPEN

I resolved this error by adding a shim for the defineGetter method: https://gist.github.com/23limes/2779043/raw/f7a18ee984f273b13b7a66fe76509feae0cdc32e/Box2D_IE9_10_shim.js

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OK, the tree is now created with this. Nevertheless, there are also this error:
SCRIPT438: L’objet ne gère pas la propriété ou la méthode « subtract »
and it's impossible to interact with the tree by mouse moves or clicking

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Hello , have you find a solution to resolve the problem of the method subtract ?
I am currently using the arbor.js lib for a project that has to work on IE 11 (works well currently) and on IE 10/8 (mode document = 10).
Thanks to your posts, i resolved the problem of defineGetter and defineSetter but not the problem of subtract...

EDIT : i found a fork that corrects this problem : https://github.com/vollstock/arbor

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i try https://github.com/vollstock/arbor , find it works well in >IE 8, when you want to support <=IE8, the defineProperty is not support Node object, then i try to use es-sham/es-shim it still work not well

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