How to sum a filtered html table?

Question

I have a HTML Table that I am able to filter with jquery. At the bottom of my table, i want to have a "total" row, that sums all values displayed. The sum displaye

Answer 1

You can query the DOM and filter by attr as follows:

Array
.from(document.querySelectorAll('table#datatable td')) // Or some other selector you wish
.filter(r=>r.hidden) // Enter here your filter func. Can also filter by `r.style.display` etc.
.reduce((sum, curr)=>sum+(Number(curr.innerHTML) || 0), 0) // Here we try to get the value of the td. If it will resolve to NaN ==> We will return 0 and won't affect the value.

This will yield the sum you desire. Place that value wherever you want then :)

Resources:

1. Array.from()
2. Array.prototype.filter()
3. Array.prototype.reduce()