Add Custom Keyboard Shortcuts

PSPDFKit.load(configuration).then((instance) => {
  const isIE11 = navigator.userAgent.indexOf("Trident/") > -1;
  instance.contentDocument.addEventListener(
    "keydown",
    keyDownHandler,
    isIE11
      ? {
          capture: true
        }
      : true
  );
  document.addEventListener(
    "keydown",
    keyDownHandler,
    isIE11
      ? {
          capture: true
        }
      : true
  );

  function keyDownHandler(event) {
    // As an example, use Control-H or ⌘-H to set the `INK` interaction mode.
    // Watch for `metaKey` too (⌘ on Mac).
    if ((event.ctrlKey || event.metaKey) && event.keyCode === 72) {
      instance.setViewState((v) =>
        v.set("interactionMode", PSPDFKit.InteractionMode.INK)
      );
    }
  }
});