re #103454. editor.

src/vs/editor/contrib/parameterHints/parameterHintsWidget.ts

@@ -152,7 +152,7 @@ export class ParameterHintsWidget extends Disposable implements IContentWidget {
 		this.visible = true;
 		setTimeout(() => {
 			if (this.domNodes) {
-				dom.addClass(this.domNodes.element, 'visible');
+				this.domNodes.element.classList.add('visible');
 			}
 		}, 100);
 		this.editor.layoutContentWidget(this);
@@ -169,7 +169,7 @@ export class ParameterHintsWidget extends Disposable implements IContentWidget {
 		this.visible = false;
 		this.announcedLabel = null;
 		if (this.domNodes) {
-			dom.removeClass(this.domNodes.element, 'visible');
+			this.domNodes.element.classList.remove('visible');
 		}
 		this.editor.layoutContentWidget(this);
 	}
@@ -225,7 +225,7 @@ export class ParameterHintsWidget extends Disposable implements IContentWidget {
 				documentation.textContent = activeParameter.documentation;
 			} else {
 				const renderedContents = this.renderDisposeables.add(this.markdownRenderer.render(activeParameter.documentation));
-				dom.addClass(renderedContents.element, 'markdown-docs');
+				renderedContents.element.classList.add('markdown-docs');
 				documentation.appendChild(renderedContents.element);
 			}
 			dom.append(this.domNodes.docs, $('p', {}, documentation));
@@ -237,7 +237,7 @@ export class ParameterHintsWidget extends Disposable implements IContentWidget {
 			dom.append(this.domNodes.docs, $('p', {}, signature.documentation));
 		} else {
 			const renderedContents = this.renderDisposeables.add(this.markdownRenderer.render(signature.documentation));
-			dom.addClass(renderedContents.element, 'markdown-docs');
+			renderedContents.element.classList.add('markdown-docs');
 			dom.append(this.domNodes.docs, renderedContents.element);
 		}
 

src/vs/workbench/contrib/codeEditor/browser/suggestEnabledInput/suggestEnabledInput.ts

@@ -4,7 +4,7 @@
  *--------------------------------------------------------------------------------------------*/
 
 import 'vs/css!./suggestEnabledInput';
-import { $, Dimension, addClass, append, removeClass } from 'vs/base/browser/dom';
+import { $, Dimension, append } from 'vs/base/browser/dom';
 import { Widget } from 'vs/base/browser/ui/widget';
 import { Color } from 'vs/base/common/color';
 import { Emitter, Event } from 'vs/base/common/event';
@@ -152,11 +152,11 @@ export class SuggestEnabledInput extends Widget implements IThemable {
 
 		this._register((this.inputWidget.onDidFocusEditorText(() => {
 			if (options.focusContextKey) { options.focusContextKey.set(true); }
-			addClass(this.stylingContainer, 'synthetic-focus');
+			this.stylingContainer.classList.add('synthetic-focus');
 		})));
 		this._register((this.inputWidget.onDidBlurEditorText(() => {
 			if (options.focusContextKey) { options.focusContextKey.set(false); }
-			removeClass(this.stylingContainer, 'synthetic-focus');
+			this.stylingContainer.classList.remove('synthetic-focus');
 		})));
 
 		const onKeyDownMonaco = Event.chain(this.inputWidget.onKeyDown);