JavaScript智能文本换行与截断：基于正则表达式的实现

(?=S).{0,${maxLen-1}}S(?!S)|S{${maxLen}}

/**
 * 将文本智能换行到指定的字符最大长度。
 * 尊重单词边界，并对超长单词进行截断。
 *
 * @param {string} str 待处理的原始文本。
 * @param {number} maxLen 每行的最大字符长度。
 * @returns {string[]} 包含换行后各行的字符串数组。
 */
function wrapLines(str, maxLen) {
    // 动态构建正则表达式
    // 'g' 标志表示全局匹配，查找所有匹配项
    // 'm' 标志表示多行模式，虽然在此特定场景下非必需，但通常用于处理多行文本
    const reg = new RegExp('(?=\S).{0,' + (maxLen - 1) + '}\S(?!\S)|\S{' + maxLen + '}', 'gm');

    // 使用 matchAll 查找所有匹配项，并将其转换为数组
    // m[0] 包含完整的匹配字符串
    return Array.from(str.matchAll(reg), (m) => m[0]);
}

// 示例文本
const sentence = `Wake has three meanings as a noun, and, yes, just about as many meanings as a verb! So get set. To wake is come out of sleep, a verb you'll recognize from "Wake up! You're asleep at the wheel!" You can wake feelings, as well as the people who are having them. The wake before the funeral caused Mike to wake from his depression and decide to live life to the fullest. His first act was to water ski; he eventually mastered staying upright while crossing the wake of the boat that was towing him.`;

// 调用函数进行换行，假设最大行长为100字符
console.log(wrapLines(sentence, 100));

// 期望的输出（部分展示，实际会根据文本和maxLen生成完整数组）
/*
[
  "Wake has three meanings as a noun, and, yes, just about as many meanings as a verb! So get",
  "set. To wake is come out of sleep, a verb you'll recognize from "Wake up! You're asleep at",
  "the wheel!" You can wake feelings, as well as the people who are having them. The wake",
  "before the funeral caused Mike to wake from his depression and decide to live life to the",
  "fullest. His first act was to water ski; he eventually mastered staying upright while",
  "crossing the wake of the boat that was towing him."
]
*/

// 测试更小的maxLen，例如10，以观察截断效果
console.log(wrapLines(sentence, 10));
/*
[
  "Wake has",
  "three",
  "meanings",
  "as a noun,",
  "and, yes,",
  "just about",
  "as many",
  "meanings",
  "as a verb!",
  "So get",
  "set. To",
  "wake is",
  "come out",
  "of sleep,",
  "a verb",
  "you'll",
  "recognize",
  "from "Wake",
  "up! You're",
  "asleep at",
  "the wheel!",
  "" You can",
  "wake",
  "feelings,",
  "as well",
  "as the",
  "people who",
  "are having",
  "them. The",
  "wake",
  "before the",
  "funeral",
  "caused Mike",
  "to wake",
  "from his",
  "depression",
  "and decide",
  "to live",
  "life to",
  "the",
  "fullest.",
  "His first",
  "act was",
  "to water",
  "ski; he",
  "eventually",
  "mastered",
  "staying",
  "upright",
  "while",
  "crossing",
  "the wake",
  "of the",
  "boat that",
  "was towing",
  "him."
]
*/