html - 在 html 中删除 javascript 并自动格式化所有 <code> 和/或 <pre> block

Question

我正在查看这个 google 美化元素: https://github.com/google/code-prettify

在用法部分，它说要像这样使用它:

<pre class="prettyprint">class Voila {
public:
  // Voila
  static const string VOILA = "Voila";

  // will not interfere with embedded <a href="#voila2">tags</a>.
}</pre>

我正在寻找一种无需向 pre 标签添加类即可设置所有 pre 标签样式的方法。有没有办法用这个库或另一个类似的库来做到这一点？我正在尝试在浏览器中为 Java/JavaScript 等突出显示语法。

Answer 1

这是一个有点 hacky 的解决方案，但查看该库中的(缩小的)代码，prettyprint 在以下部分中使用:

u = /\bprettyprint\b/

和

if ((k !== h || u.test(n)) && !e.test(n)) {
  q = !1;
  for (l = d.parentNode; l; l = l.parentNode)
    if (w.test(l.tagName) && l.className &&
        u.test(l.className)) {

它测试迭代元素的 className 是否匹配那个正则表达式。因此，如果您只是删除针对 u 的那些测试，它应该可以工作而无需向 <pre> 添加类:

if (!e.test(n)) {
  q = !1;
  for (l = d.parentNode; l; l = l.parentNode)
    if (w.test(l.tagName)) {

现在只测试 w ( /^(?:pre|code|xmp)$/i ) 是否与元素的 tagName 匹配。

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<pre>class Voila {
public:
  // Voila
  static const string VOILA = "Voila";

  // will not interfere with embedded <a href="#voila2">tags</a>.
}</pre>