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Use optional chaining, where possible, in the web/
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By using optional chaining, see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Optional_chaining, it's possible to reduce unnecessary code-repetition in many cases.
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11 changed files with 27 additions and 32 deletions
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@ -122,7 +122,7 @@ class PDFLayerViewer extends BaseTreeViewer {
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this._optionalContentConfig = optionalContentConfig || null;
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this._pdfDocument = pdfDocument || null;
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const groups = optionalContentConfig && optionalContentConfig.getOrder();
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const groups = optionalContentConfig?.getOrder();
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if (!groups) {
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this._dispatchEvent(/* layersCount = */ 0);
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return;
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