Question

I have a filter and used this script for the filter.

filteredData = filteredData.filter(function() {
  var elm = $(this),
  price = parseInt('0' + elm.attr('data-price'), 10) || 0;
  if ($(price < 15)) {
    return !(250 <= price);
  } else {
    return !(sliderData <= price);
  }
});

But something is wrong. The price value is 15 or more. But the code never enters the else structure.

Answer 1

Try removing the $() function call from this line:

if ($(price < 15)) {

It should be:

if (price < 15) {

The $() function returns an object, and all objects are “truthy” so this code would always go into the if block rather than the else block.

(By the way, assuming you fix the above problem, within the if branch the expression you are returning !(250 <= price) will always be true because price will be < 15, so you might as well just say return true; at that point.)