function isBrowser() {
	return (
		// Check that we are not running in a Node.js runtime:
		IS_NODE === false &&

		// Check for presence of `window` variable:
		typeof window === 'object' &&

		// Check that the `window` variable matches the determined global variable:
		window === Global &&

		// Check that the `window` variable is equal to the global scope:
		globalScope === true
	);
}
Returns a boolean indicating if the runtime is a web browser.

@returns {boolean} boolean indicating if runtime is a web browser

@example
var bool = isBrowser();
// returns <boolean>