docs: function registerBreakpoints(breakpoints) {
  		let register = [];
  
  		Object.keys(breakpoints).forEach(name => {
  			register.push('(^' + escRgx(name) + '$)');
  		});
  
  		if (! register.length) {
  			return false;
  		}
  
  		return new RegExp(register.join('|'));
  	}