Drop javascript in html and auto-format all <code> and/or <pre> blocks

Question

I am looking at this google prettify project: https://github.com/google/code-prettify

In the usage section it says to use it like so:

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

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

I am looking for a way to style all pre tags without having to add a class to the pre tag. Is there some way to do this with this library or another similar library? I am trying to syntax highlighting in the browser for Java/JavaScript etc.

Answer 1

This is a somewhat hacky solution, but looking at the (minified) code in that library, prettyprint is used in the following section:

u = /\bprettyprint\b/

and

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)) {

It tests whether the className of the iterated elements matches that regular expression. So, if you just remove those tests against u, it should work without having to add a class to the <pre>s:

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

It's now only testing if w (/^(?:pre|code|xmp)$/i) matches the tagName of the element.

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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>