javascript - Check whether window.onerror is availale or not -

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In my JavaScript logging framework, I'm holding the unrestricted exception via window. Inter-handler

How do I check whether window.errorerror is available or not? This window will not recognize some of the browsers. Terror

You can check with: 

  if (typeof Window.errorerror === 'undefined') {// You can not use the window. Terror} other {// you can}}   
 See MDN Docs for Headstart, how you can work on cross browser, how to override it or make some type of polyphil Are:

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