使用TypeScript去除数字字符串后面的零：高效实现方法

function removeTrailingZeros(numberString: string): string {
  const trimmedString = numberString.trim(); // 去除首尾空格
  const decimalIndex = trimmedString.indexOf('.');
  
  if (decimalIndex !== -1) {
    let endIndex = trimmedString.length - 1;
    
    while (trimmedString[endIndex] === '0') {
      endIndex--;
    }
    
    if (trimmedString[endIndex] === '.') {
      endIndex--; // 如果小数点后面全是零，也去掉小数点
    }
    
    return trimmedString.slice(0, endIndex + 1);
  }
  
  return trimmedString;
}

// 示例用法
const numberString1 = '3.1400';
const result1 = removeTrailingZeros(numberString1);
console.log(result1);  // 输出: "3.14"

const numberString2 = '10.00';
const result2 = removeTrailingZeros(numberString2);
console.log(result2);  // 输出: "10"

const numberString3 = '5.50';
const result3 = removeTrailingZeros(numberString3);
console.log(result3);  // 输出: "5.5"