无法通过NSHTMLTextDocumentType读取<strong>标签，内容无法加粗求助

嘿，我懂你的困扰——代码没法处理<strong>标签，没法把对应内容变成加粗效果对吧？下面给你针对不同场景的实用解决办法：

场景1：浏览器前端处理 #

如果你是在网页里需要把这段HTML文本转成带加粗效果的内容，有两种思路：

直接让浏览器渲染HTML #

如果你的需求是在页面上显示加粗效果，不用转成Markdown，直接把文本插入到DOM元素里就行，浏览器会自动解析<strong>标签：

// 假设你有一个id为content的容器元素
const contentContainer = document.getElementById('content');
let txt = "<p><em>The first day of your <strong>Kerala tour itinerary</strong> starts with a trip along the winding roads to the beautiful hill station of Munnar</em></p>\r\n<p>Your holiday to the mesmerizing Munnar starts with a&nbsp;transfer from Cochin. Enjoy the picturesque hill-station as you drive through the serpentine roads surrounded by lush green hills. En...";

contentContainer.innerHTML = txt;

这样页面上的Kerala tour itinerary就会自动显示为加粗样式。

转成Markdown加粗格式 #

如果需要把<strong>标签替换成Markdown的**加粗语法，用正则表达式替换就很方便：

let txt = "<p><em>The first day of your <strong>Kerala tour itinerary</strong> starts with a trip along the winding roads to the beautiful hill station of Munnar</em></p>\r\n<p>Your holiday to the mesmerizing Munnar starts with a&nbsp;transfer from Cochin. Enjoy the picturesque hill-station as you drive through the serpentine roads surrounded by lush green hills. En...";

// 全局替换<strong>和</strong>为Markdown加粗符号，忽略标签大小写
const processedText = txt.replace(/<strong>(.*?)<\/strong>/gi, "**$1**");
console.log(processedText);

场景2：Node.js后端处理 #

如果是在Node.js环境下处理这段文本（没有浏览器DOM支持），可以用cheerio这个轻量的HTML解析库来处理，比正则更稳妥：

1. 先安装cheerio：

npm install cheerio

2. 然后编写处理代码：

const cheerio = require('cheerio');
let txt = "<p><em>The first day of your <strong>Kerala tour itinerary</strong> starts with a trip along the winding roads to the beautiful hill station of Munnar</em></p>\r\n<p>Your holiday to the mesmerizing Munnar starts with a&nbsp;transfer from Cochin. Enjoy the picturesque hill-station as you drive through the serpentine roads surrounded by lush green hills. En...";

// 加载HTML文本
const $ = cheerio.load(txt);

// 将所有<strong>标签替换为Markdown加粗格式
$('strong').replaceWith(function() {
  return `**${$(this).text()}**`;
});

// 获取处理后的文本
const result = $.html();
console.log(result);

内容的提问来源于stack exchange，提问作者kulss