javascript - 为每个字母添加跨度，但避免使用 javascript 的 html 标签

Question

我有一个字符串

var string = "Selected<br>Works"

我需要用 <span></span> 包装每个字母，避免包装 <br>跨度内的标签。可以用正则表达式吗？

我做到了:

'Selected<br>Works'.replace(/\S/g, '<span class="letter">$&</span>')

哪个返回:

<span class="letter">S</span>
<span class="letter">e</span>
<span class="letter">l</span>
<span class="letter">e</span>
<span class="letter">c</span>
<span class="letter">t</span>
<span class="letter">e</span>
<span class="letter">d</span>
<span class="letter">&lt;</span>
<span class="letter">b</span>
<span class="letter">r</span>
<span class="letter">&gt;</span>
<span class="letter">W</span>
<span class="letter">o</span>
<span class="letter">r</span>
<span class="letter">k</span>
<span class="letter">s</span>

虽然期望的结果是:

<span class="letter">S</span>
<span class="letter">e</span>
<span class="letter">l</span>
<span class="letter">e</span>
<span class="letter">c</span>
<span class="letter">t</span>
<span class="letter">e</span>
<span class="letter">d</span>
<br>
<span class="letter">W</span>
<span class="letter">o</span>
<span class="letter">r</span>
<span class="letter">k</span>
<span class="letter">s</span>

其他字符串示例是:

• Art Direction<br>Creative Concept<br>UX/UI Design

• Digital Branding<br>Website

Answer 1

你可以使用 replace使用一种前瞻性的正则表达式:

var string = "Selected<br>Works",
    result = string.replace(/(?![^<]*>)[^<]/g, c => `<span>${c}</span>\n`);

console.log(result);

这也会跳过其他标签，比如 <p>或 </canvas> .尽管如此，它仍无法处理更复杂的 HTML(包括脚本、注释等)，正则表达式对此不适用。