How to use the vscode-html-languageservice.TokenType.EOS function in vscode-html-languageservice

export function getDocumentRegions(
    languageService: LanguageService,
    document: TextDocument
): HTMLDocumentRegions {
    const regions: EmbeddedRegion[] = [];
    const scanner = languageService.createScanner(document.getText());
    let lastTagName: string = '';
    let lastAttributeName: string | null = null;
    let languageIdFromType: string | undefined;
    const importedScripts: string[] = [];

    let token = scanner.scan();
    while (token !== TokenType.EOS) {
        switch (token) {
            case TokenType.StartTag:
                lastTagName = scanner.getTokenText();
                lastAttributeName = null;
                languageIdFromType = 'javascript';
                break;
            case TokenType.Styles:
                regions.push({
                    languageId: 'css',
                    start: scanner.getTokenOffset(),
                    end: scanner.getTokenEnd(),
                    onlyPlaceholders: onlyPlaceholdersRegex.test(scanner.getTokenText()),
                });
                break;
            case TokenType.Script:
                regions.push({

export function getDocumentRegions(languageService: LanguageService, document: TextDocument): HTMLDocumentRegions {
	let regions: EmbeddedRegion[] = [];
	let scanner = languageService.createScanner(document.getText());
	let lastTagName: string = '';
	let lastAttributeName: string | null = null;
	let languageIdFromType: string | undefined = undefined;
	let importedScripts: string[] = [];

	let token = scanner.scan();
	while (token !== TokenType.EOS) {
		switch (token) {
			case TokenType.StartTag:
				lastTagName = scanner.getTokenText();
				lastAttributeName = null;
				languageIdFromType = 'javascript';
				break;
			case TokenType.Styles:
				regions.push({ languageId: 'css', start: scanner.getTokenOffset(), end: scanner.getTokenEnd() });
				break;
			case TokenType.Script:
				regions.push({ languageId: languageIdFromType, start: scanner.getTokenOffset(), end: scanner.getTokenEnd() });
				break;
			case TokenType.AttributeName:
				lastAttributeName = scanner.getTokenText();
				break;
			case TokenType.AttributeValue: