Google Sheets with Macro to Reformat and Bold Text in a Cell

macro.js

/** @OnlyCurrentDoc */

function ReformatandBold() {
  var spreadsheet = SpreadsheetApp.getActive();
  var cellText = spreadsheet.getCurrentCell().getValue();
  var newCellText = '';
  var subCompetencies = [];
  cellText.split('[').forEach((element) => {
    if (!element){
      return;
    }
    var subsplits = element.split('] ');
    subCompetencies.push(subsplits[0].trim());
    newCellText += subsplits[0].trim() + "\n" + subsplits[1].trim() + "\n\n";
  });
  newCellText = newCellText.trim();
  var newRichValue = SpreadsheetApp.newRichTextValue().setText(newCellText);
  subCompetencies.forEach((subComp) => {
    var i = newCellText.search(subComp);
    newRichValue.setTextStyle(i, i+subComp.length, SpreadsheetApp.newTextStyle()
    .setBold(true)
    .build())
  });
  spreadsheet.getCurrentCell().setRichTextValue(newRichValue.build());
};