问使用子字符串在React组件中裁切文本，而无需停止文字

EN

function trimDownToWord(string, maxLength) {
  if (string <= maxLength) {
    return string;
  }

  let first = string.substr(0, maxLength);
  const second = string.substr(maxLength);

  if (/\w$/.test(first) && /^\w/.test(second)) {
    first = first.replace(/\b[^\w]*\w+$/, '');
  }

  return first.trim() + '...';
}



const lead = `This is multiple words, many fun words to read!`

// Without word trimming:
const trimmedAtLength = lead.substring(0, 25) + '...';
console.log(trimmedAtLength);

// With word trimming:
const trimmedByWords = trimDownToWord(lead, 26);
console.log(trimmedByWords);