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Focus PDF viewer on load | Nutrient

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To focus on the Nutrient instance when it loads, get a reference to the window object of the Nutrient Web SDK viewer frame and call focus() on it after the NutrientViewer.load promise resolves:

NutrientViewer.load(configuration).then((instance) => {
  instance.contentWindow.focus();
});

This has been tested with Nutrient Web SDK 2020.5.1.