handleDecrement (step = this.step) {
      if (!this.isInteractive) return
      let nextValue = Number(this._value) - Number(step)

      if (this.keepWithinRange) {
        nextValue = Math.max(nextValue, this.min)
      }

      nextValue = roundToPrecision(nextValue, this._precision)
      this.updateValue(nextValue)
      this.$emit('decrement', nextValue)
      this.focusInput()
    }
Handles value decrement
@param {Number} step Value to be decremented