Timer with color stops

/*Downloaded from https://www.codeseek.co/025pro/timer-with-color-stops-pPJzzo */
.timer-progress {
  height: 10px;
  width: 250px;
  border-radius: 25px;
  position: relative;
  background: #ccc;
}
.timer-progress .after {
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  border-radius: 25px;
  transition: width linear 1s, background-color linear .3s;
}

/*Downloaded from https://www.codeseek.co/025pro/timer-with-color-stops-pPJzzo */
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }

var TimerProgress = function (_React$Component) {
  _inherits(TimerProgress, _React$Component);

  function TimerProgress(props) {
    _classCallCheck(this, TimerProgress);

    var _this = _possibleConstructorReturn(this, (TimerProgress.__proto__ || Object.getPrototypeOf(TimerProgress)).call(this, props));

    _this.timer = props.timer;
    _this.max = props.max;
    _this.width = props.width;
    if (props.current > _this.max) {
      throw "Current progress cannot be higher than max value";
    }
    _this.state = {
      current: props.current
    };
    _this.stops = props.stops;
    return _this;
  }

  _createClass(TimerProgress, [{
    key: "componentDidMount",
    value: function componentDidMount() {
      var self = this;
      this.tick = function () {
        self.setState({
          current: self.state.current - 1
        });
      };
      this.timer.addTick(this.tick);
    }
  }, {
    key: "componentWillUnmount",
    value: function componentWillUnmount() {
      this.timer.removeTick(this.tick);
    }
  }, {
    key: "componentWillReceiveProps",
    value: function componentWillReceiveProps(nextProps) {
      if (nextProps.current > this.max) {
        throw "Current progress cannot be higher than max value";
      }
      this.setState({
        current: nextProps.current
      });
    }
  }, {
    key: "getProgressWidth",
    value: function getProgressWidth() {
      return this.state.current / this.max * this.width + "px";
    }
  }, {
    key: "getBackColor",
    value: function getBackColor() {
      var curPercent = this.state.current / this.max * 100;
      var backs = this.stops.sort(function (a, b) {
        return a.percent - b.bercent;
      });
      var first = backs.filter(function (a) {
        return a.percent <= curPercent;
      })[0];
      return first.color;
    }
  }, {
    key: "render",
    value: function render() {
      return React.createElement(
        "div",
        { className: "timer-progress", style: { width: this.width } },
        React.createElement("div", { className: "after", style: { width: this.getProgressWidth(), background: this.getBackColor() } })
      );
    }
  }]);

  return TimerProgress;
}(React.Component);

/* ==== DEMO ==== */


var current = 15;
var step = 1;
var max = 15;
var colorStops = [{
  percent: 40,
  color: "green"
}, {
  percent: 20,
  color: "orange"
}, {
  percent: 0,
  color: "red"
}];

var GlobalTimer = function GlobalTimer() {
  var o = this;

  var ticks = [];

  o.addTick = function (tick) {
    ticks.push(tick);
  };
  o.removeTick = function (tick) {
    var index = ticks.indexOf(tick);
    ticks.splice(index, 1);
  };

  setInterval(function () {
    ticks.forEach(function (t) {
      t();
    });
  }, 1000);

  return o;
};

var globalTimer = new GlobalTimer();

ReactDOM.render(React.createElement(TimerProgress, { max: max, current: current, width: 200, timer: globalTimer, stops: colorStops }), document.getElementById('root'));