truncate.js

const truncate = (label, divisor, precision = 1) => {
  if(!label){
    return label
  }
  
  const labelSplited = label.split(divisor);
  const hiddenNames = ['DOS', 'DAS', 'DE', 'DO'];

  const divisors = labelSplited.map((element, index) => {
    if (!index || index + 1 === labelSplited.length) {
      return element;
    }

    if (hiddenNames.includes(element)) {
      return false;
    }

    return `${element.substr(0, precision)}`;
  }).filter(element => element);

  return divisors.join(' ');
};