从字符串中删除空方括号

function removeEmptyBrackets(str) {
  let charArray = str.split('');
  let result = '';

  for (let i = 0; i < charArray.length; i++) {
    let currentChar = charArray[i];

    if (currentChar === '[' || currentChar === ']') {
      let prevChar = charArray[i - 1];
      let nextChar = charArray[i + 1];

      if (prevChar !== ' ' && nextChar !== ' ') {
        result += currentChar;
      }
    } else {
      result += currentChar;
    }
  }

  return result;
}

let inputString = 'This is a [ ] sample [ ] string.';
let outputString = removeEmptyBrackets(inputString);
console.log(outputString);