How Do I Make Link Annotations Open In The Same Tab As WebViewer?

FAQ
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1

By default, WebViewer opens links in documents in another tab. If you wish for links to open in the same window that WebViewer is in:

WebViewer(/*...*/).then(instance => {
  // Assumes WebViewer 8.0+
  const { Annotations } = instance.Core;

  const createInnerElement = Annotations.Link.prototype.createInnerElement;
  Annotations.Link.prototype.createInnerElement = function() {
    const button = this;

    const el = createInnerElement.apply(this, arguments);
    el.addEventListener('mouseup', () => {
      window.open(button.actions['U'][0].uri, '_self');
    });

    return el;
  };
});
2

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