microsoft/playwright · error · Error

"scope" engine expects no arguments

Error message

"scope" engine expects no arguments

What it means

Error ""scope" engine expects no arguments" thrown in microsoft/playwright.

Source

Thrown at packages/injected/src/selectorEvaluator.ts:415

    return args.length === 1 ? elements : sortInDOMOrder(elements);
  },
};

const hasEngine: SelectorEngine = {
  matches(element: Element, args: (string | number | Selector)[], context: QueryContext, evaluator: SelectorEvaluator): boolean {
    if (args.length === 0)
      throw new Error(`"has" engine expects non-empty selector list`);
    return evaluator.query({ ...context, scope: element }, args).length > 0;
  },

  // TODO: we can implement efficient "query" by matching "args" and returning
  // all parents/descendants, just have to be careful with the ":scope" matching.
};

const scopeEngine: SelectorEngine = {
  matches(element: Element, args: (string | number | Selector)[], context: QueryContext, evaluator: SelectorEvaluator): boolean {
    if (args.length !== 0)
      throw new Error(`"scope" engine expects no arguments`);
    const actualScope = context.originalScope || context.scope;
    if (actualScope.nodeType === 9 /* Node.DOCUMENT_NODE */)
      return element === (actualScope as Document).documentElement;
    return element === actualScope;
  },

  query(context: QueryContext, args: (string | number | Selector)[], evaluator: SelectorEvaluator): Element[] {
    if (args.length !== 0)
      throw new Error(`"scope" engine expects no arguments`);
    const actualScope = context.originalScope || context.scope;
    if (actualScope.nodeType === 9 /* Node.DOCUMENT_NODE */) {
      const root = (actualScope as Document).documentElement;
      return root ? [root] : [];
    }
    if (actualScope.nodeType === 1 /* Node.ELEMENT_NODE */)
      return [actualScope as Element];
    return [];
  },

View on GitHub (pinned to c8fc3bf8d3)

When it happens

Trigger: Thrown at packages/injected/src/selectorEvaluator.ts:415 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of microsoft/playwright@c8fc3bf8d3 (2026-08-12). Data as JSON: /api/errors/de01710dae898dbb. Report an issue: GitHub.