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The polyfill relies on MutationObserver which isn't supported in several environments (like old IE). That's not a big deal since those environments don't typically have the 300ms delay, but we need to exit early if the MutationObserver isn't supported or else we'll get errors in those environments. For example:
IE 9:
PhantomJS 1.9.8:
The text was updated successfully, but these errors were encountered:
The polyfill relies on MutationObserver which isn't supported in several environments (like old IE). That's not a big deal since those environments don't typically have the 300ms delay, but we need to exit early if the MutationObserver isn't supported or else we'll get errors in those environments. For example:
IE 9:
![image](https://cloud.githubusercontent.com/assets/1256329/10920944/db665352-8240-11e5-8145-4d0265340a69.png)
PhantomJS 1.9.8:
![image](https://cloud.githubusercontent.com/assets/1256329/10920904/aae1a4ca-8240-11e5-8d2b-91f9d527168a.png)
The text was updated successfully, but these errors were encountered: