detect-indent 0.1.0

Detect the indentation of code
Documentation 
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// devtools-detect
// by Sindre Sorhus
// MIT License
(function (window) {
    /*global CustomEvent */
    'use strict';
  var devtools = window.devtools = { open: false };
  var threshold = 150;
  var emitEvent = function (state) {
		window.dispatchEvent(new CustomEvent('devtoolschange', {
			detail: {
				open: state
			}
		}));
    };

    setInterval(function () {
		if (window.outerWidth - window.innerWidth > threshold ||
			window.outerHeight - window.innerHeight > threshold) {
			if (!devtools.open) {
                emitEvent(true);
			}
			devtools.open = true;
        } else {
			if (devtools.open) {
				emitEvent(false);
			}
			devtools.open = false;
		}
	}, 500);
})(window);