lab-js-chornometer/javascript/chronometer.js at e31863985b7324f21142e084e0c522a61ac7b7d9 · web-dev-open/lab-js-chornometer · GitHub

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class Chronometer {
  constructor() {
    // ... your code goes here
    this.currentTime = 0;
    this.intervalID = 0;
  }

  start(callback) {
    // ... your code goes here
    this.intervalID = setInterval(() => {
      this.currentTime ++;
      if (callback){
        callback();
      }
    }, 1000);
  }

  getMinutes() {
    // ... your code goes here
    return Math.floor(this.currentTime / 60);
  }

  getSeconds() {
    // ... your code goes here
    return this.currentTime % 60;
  }

  computeTwoDigitNumber(value) {
    // ... your code goes here
    return value.toString().padStart(2,'0');
  }

  stop() {
    // ... your code goes here
    clearInterval(this.intervalID);
  }

  reset() {
    // ... your code goes here
    this.currentTime = 0;
  }

  split() {
    // ... your code goes here
    return `${this.computeTwoDigitNumber(this.getMinutes())}: ${this.computeTwoDigitNumber(this.getSeconds())}`;
  }
}

// The following is required to make unit tests work.
/* Environment setup. Do not modify the below code. */
if (typeof module !== 'undefined') {
  module.exports = Chronometer;
}