JavaScript 函数：反转长单词

function reverseLongWords(str) { var words = str.split(' '); for (var i = 0; i < words.length; i++) { if (words[i].length >= 5) { words[i] = words[i].split('').reverse().join(''); } } return words.join(' '); }

// 示例 var str = 'This is a sample string'; var result = reverseLongWords(str); console.log(result); // 'sihT is a elpmas gnirts'