Trying to remove whitespace from a column header

This is really two questions in one. Hopefully someone can help me…

I have a lambda function written in node.js which uses the library to convert an excel spreadsheet into JSON. This was working fine except for that some of the column headers had whitespace at the end. I was trying to remove it by adding the code below (in visual studio code), which I found in another issue.

https://github.com/SheetJS/js-xlsx/issues/443#event-1012916154

 var range = XLSX.utils.decode_range(ws['!ref']);
    for(var R = range.s.r; R <= range.e.r; ++R){
      for(var C = range.s.c; C <= range.e.c; ++C) {
        var coord = XLSX.utils.encode_cell({r:R, c:C}), cell = ws[coord];
        if(!cell || !cell.v) continue;
        // clean up raw value of string cells
        if(cell.t == 's') cell.v = cell.v.trim();
        // clean up formatted text
        if(cell.w) cell.w = cell.w.trim();
      }
    }

Instead of removing white space it removed the entire column. When I reverse these changes the column was still missing when I ran the previously working code.

1. Does anyone know why column is still missing when I have reverted to the original code?
2. How can I trim just the white space from a column header with this library?

[SheetJSDev]

If a column is missing, likely the header label is missing or the range is incorrect.

To trim column headers:

function trim_headers(ws) {
	if(!ws || !ws["!ref"]) return;
	var ref = XLSX.utils.decode_range(ws["!ref"]);
	for(var C = ref.s.c; C <= ref.e.c; ++C) {
		var cell = ws[XLSX.utils.encode_cell({r:ref.s.r, c:C})];
		if(cell.t == "s") {
			cell.v = cell.v.trim();
			if(cell.w) cell.w = cell.w.trim();
		}
	}
}

[MelvinVermeer]

We also wanted to trim headers, this is what we used. Lodash - mapKeys (docs) Hope this helps.

const json = XLSX.utils
        .sheet_to_json(workbook.Sheets['Sheet1'])	        
        .map(row => mapKeys(row, (value, key) => key.trim()))