The width in px the browser paints text at in a UI font: for sizing a control to a sample
label (a toolbar button to its widest value). Nothing to do with cells: spreadsheet text is
measured by the sdk's font collection, with Excel's numbers.
A cached canvas measures with the browser's own advances. Where there is no canvas (jsdom, a
server) the width is estimated from the character count, which is enough to size a control.
The width in px the browser paints
textat in a UI font: for sizing a control to a sample label (a toolbar button to its widest value). Nothing to do with cells: spreadsheet text is measured by the sdk's font collection, with Excel's numbers.