Force numeric editor to return a number in hot.getSourceData()

Tags: #<Tag:0x00007f3446961438>


First post in a long time :slight_smile:

We have some numeric editors, quite simple, but are finding that they are returning empty strings sometimes, rather than null values:


See that rate is string?

This usually happens if we type a space, then tab out of the cell.

I’m a little rusty on the code as I’m picking it up after about a year (it’s HoT 7x).

I can share the editor definition if needs be, but hoping it’s as simple as a configuration property I’ve missed.

OK… I think I fixed it!

import Handsontable from 'handsontable'

const NumericEditor = Handsontable.editors.TextEditor.prototype.extend()

NumericEditor.prototype.createElements = function () {
  Handsontable.editors.TextEditor.prototype.createElements.apply(this, arguments)
  this.TEXTAREA.onchange = (event => {
    const value =,/g, '').trim(), this.col, value || null) // <-- needed to set || null

export default NumericEditor

The reason we need to do this, is so that JSON is properly parsed on the server.

That’s a quick update, Dave!
I guess that we have this issue reported here but I’m glad that you find a way to make it work in a custom editor.