Cannot read property 'replace' of undefined(..) when calling highlightBlock() or highlightAuto()

When I call hljs.highlightBlock(); or hljs.highlightAuto(); I get this error: Cannot read property 'replace' of undefined(..)

[isagalaev]

Ah… This doesn’t work because hljs.initHighlighting only works once. To highlight anything dynamically you call hljs.highlightBlock on specific code blocks. It’s okay to let hljs.initHighlighting work on $(document).read but on pjax:end you should first figure out which blocks arent’ highlighted yet:

$(document).on('pjax:end', function() {
  $('pre code:not(.hljs)').each(function(i, block) {
    hljs.highlightBlock(block);
  });
});

I haven’t tested the code, it’s just to show the idea.

And your original code didn’t work because hljs.highlightAuto is a lower level function that accepts code as a simple string, not a DOM node.

[isagalaev]

I think it’s safe to close by now, as it’s obviously not a bug with either of the methods mentioned.