MediaWiki:Common.js

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// syntax highlighter
var syntaxElements = document.querySelectorAll("pre");
// for each element do an action
syntaxElements.forEach(checkSyntax);
function checkSyntax() {
  // check if it has the specified keyword
  if (code.textContent.indexOf("game.") > -1) {
    // (technically) insert elements for specified keywords to color them
    code.innerHTML = code.textContent
      .replace(".", "<span style='color: #b1ac8b;'>.</span>")
      .replace("game", "<span style='color: #9cdcfe;'>game</span>");
  }
}