If you have EDT with selection mode single or multiple and choose value and then click and hold on left mouse button and scroll over table then error with
in extendedDataTable.js on row 674.
Step to reproduce
1.) Deploy Metamer application and open http://localhost:8080/metamer/faces/components/richExtendedDataTable/selection.xhtml
2) Open Console F12 and Console TAB
3) Click on Alabama. This row is now blue.
4) Click and Hold on Alaska and drag mouse down till you reach Florida.
5) Release mouse. Now error is displayed in console.
6) Optionaly you can choose Selection Mode: multiple its on bottom part of page.