code: function getCroppedString(text, offset = 0, startCropIndex, endCropIndex) {
    if (!startCropIndex) {
      return text;
    }
  
    const start = offset;
    const end = offset + text.length;
  
    const shouldBeVisible = !(start >= startCropIndex && end <= endCropIndex);
    if (!shouldBeVisible) {
      return null;
    }
  
    const shouldCropEnd = start < startCropIndex && end > startCropIndex;
    const shouldCropStart = start < endCropIndex && end > endCropIndex;
    if (shouldCropEnd) {
      const cutIndex = startCropIndex - start;
      return (
        text.substring(0, cutIndex) +
        ELLIPSIS +
        (shouldCropStart ? text.substring(endCropIndex - start) : "")
      );
    }
  
    if (shouldCropStart) {
      // The string should be cropped at the beginning.
      const cutIndex = endCropIndex - start;
      return text.substring(cutIndex);
    }
  
    return text;
  }
docs: Returns a cropped substring given an offset, start and end crop indices in a
  parent string.
  
  @param {String} text: The substring to crop.
  @param {Integer} offset: The offset corresponding to the index at which
  the substring is in the parent string.
  @param {Integer|null} startCropIndex: the index where the start of the crop
  should happen in the parent string.
  @param {Integer|null} endCropIndex: the index where the end of the crop
  should happen in the parent string
  @returns {String|null} The cropped substring, or null if the text is
  completly cropped.