用标签包裹单词，保留标记

Question

例如我有一个带有标记的字符串（来自 html 节点）：

hello, this is dog

"h<em>e<strong>llo, thi</strong>s i</em><strong>s d</strong>og"

在其中找到一些单词（比如说“hello”和“dog”）、将它们包裹在一个 span 中（突出显示）并保存所有标记的最正确方法是什么？

所需的输出是这样的（注意正确关闭的标签）

<span class="highlight">h<em>e<strong>llo</strong></em></span><strong>,</strong> <em><strong>thi</strong>s<em> i</em><strong>s <span class="highlight"><strong>d</strong>og</span>

看起来应该是一样的：

hello, this is dog

Answer 1

给你：

//Actual string
var string = "h<em>e<strong>llo, thi</strong>s i</em><strong>s d</strong>og";

//RegExp to cleanup html markup
var tags_regexp = /<\/?[^>]+>/gi;

//Cleaned string from markup
var pure_string = string.replace(tags_regexp,"");

//potential words (with original markup)
var potential_words = string.split(" ");

//potential words (withOUT original markup)
var potential_pure_words = pure_string.split(" ");

//We're goin' into loop here to wrap some tags around desired words
for (var i in potential_words) {

    //Check words here
    if(potential_pure_words[i] == "hello," || potential_pure_words[i] == "dog")

    //Wrapping...
    potential_words[i] = "<span class=\"highlight\">" + potential_words[i] + "</span>";
}

//Make it string again
var result = potential_words.join(" ");

//Happy endings :D
console.log(result);