function configure(userOptions) {
    if (userOptions.useBR) {
      console.warn("'useBR' option is deprecated and will be removed entirely in v11.0");
      console.warn("Please see https://github.com/highlightjs/highlight.js/issues/2559");
    }
    options = inherit$1(options, userOptions);
  }
Highlights to all <pre><code> blocks on a page

@type {Function & {called?: boolean}}