Compiled version of https://github.com/theinterned/backbone-responsive-view, slightly modified.

backbone-enquire-mixin.js

(function(_, Enquire) {

  'use strict';

  window.BackboneEnquireMixin = {

    enquire: function(breakpoints) {
      var breakpoint, handler, method, _i, _len, _ref;
      if (!breakpoints) {
        breakpoints = this.breakpoints;
      }
      breakpoints = this._getBreakpoints(breakpoints);
      if (typeof breakpoints !== 'object') {
        return;
      }
      for (breakpoint in breakpoints) {
        handler = breakpoints[breakpoint];
        if (typeof handler === 'string') {
          handler = this[handler];
        } else if (typeof handler === 'object') {
          _ref = ['match', 'unmatch', 'setup', 'destroy'];
          for (_i = 0, _len = _ref.length; _i < _len; _i++) {
            method = _ref[_i];
            if (typeof handler[method] === 'string') {
              handler[method] = this[handler[method]];
            }
          }
        }
        Enquire.register(breakpoint, _.bind(handler, this));
      }
      return this;
    },

    unenquire: function(breakpoints, breakpoint) {
      var handler;
      if (!breakpoints) {
        breakpoints = this.breakpoints;
      }
      if (breakpoints === false) {
        Enquire.unregister(breakpoint);
      } else {
        breakpoints = this._getBreakpoints(breakpoints);
        for (breakpoint in breakpoints) {
          handler = breakpoints[breakpoint];
          if (typeof handler === 'string') {
            handler = this[handler];
          }
          Enquire.unregister(breakpoint, handler);
        }
      }
      return this;
    },

    _getBreakpoints: function(breakpoints) {
      if (typeof breakpoints === 'string') {
        breakpoints = this[breakpoints];
      }
      if (breakpoints === true) {
        breakpoints = this.breakpoints;
      }
      return breakpoints;
    }
  };

})(window._, window.enquire);