javascript - 对数 slider 返回 NaN

Question

我正在尝试按照 Logarithmic slider 中的示例进行操作.

这是我使用的代码:

Timeline._MIN_PER_MINUTE = 1;
Timeline._MIN_PER_HOUR = Timeline._MIN_PER_MINUTE * 60.0;
Timeline._MIN_PER_DAY = Timeline._MIN_PER_HOUR * 24.0;
Timeline._MIN_PER_WEEK = Timeline._MIN_PER_DAY * 7.0;
Timeline._MIN_PER_MONTH = Timeline._MIN_PER_WEEK * 4.0;
Timeline._MIN_PER_YEAR = Timeline._MIN_PER_MONTH * 12.0;

var scale_down = 0.00001;
var scale_up = 100000;
Timeline._SLIDER_MIN = 0;
Timeline._SlIDER_MAX = 100;
Timeline._SLIDER_STEP = 1;

Timeline._scale = function (value) {
  var minIn = Timeline._SLIDER_MIN;
  var maxIn = Timeline._SLIDER_MAX;

  var minOut = Math.log(Timeline._MIN_PER_MINUTE);
  var maxOut = Math.log(Timeline._MIN_PER_YEAR);

  var scale = (maxOut - minOut) / (maxIn - minIn);

  return Math.exp(minOut + scale * (value - minIn));
};

Timeline._sliderChangedHandler = function(id){
  var val = Timeline._scale($('#scale_slider' + id).val());
  alert(val);
};

出于某种原因，结果我得到了 NaN。有人知道我做错了什么吗？

Answer 1

用这个var val = Timeline._scale(parseInt($('#scale_slider' + id).val(), 10));