{"record":{"id":"7010d1986ee2fd46","repo":"microsoft/playwright","slug":"has-engine-expects-non-empty-selector-list","errorCode":null,"errorMessage":"\"has\" engine expects non-empty selector list","messagePattern":"\"has\" engine expects non-empty selector list","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"packages/injected/src/selectorEvaluator.ts","lineNumber":404,"sourceCode":"    if (args.length === 0)\n      throw new Error(`\"is\" engine expects non-empty selector list`);\n    return args.some(selector => evaluator.matches(element, selector, context));\n  },\n\n  query(context: QueryContext, args: (string | number | Selector)[], evaluator: SelectorEvaluator): Element[] {\n    if (args.length === 0)\n      throw new Error(`\"is\" engine expects non-empty selector list`);\n    let elements: Element[] = [];\n    for (const arg of args)\n      elements = elements.concat(evaluator.query(context, arg));\n    return args.length === 1 ? elements : sortInDOMOrder(elements);\n  },\n};\n\nconst hasEngine: SelectorEngine = {\n  matches(element: Element, args: (string | number | Selector)[], context: QueryContext, evaluator: SelectorEvaluator): boolean {\n    if (args.length === 0)\n      throw new Error(`\"has\" engine expects non-empty selector list`);\n    return evaluator.query({ ...context, scope: element }, args).length > 0;\n  },\n\n  // TODO: we can implement efficient \"query\" by matching \"args\" and returning\n  // all parents/descendants, just have to be careful with the \":scope\" matching.\n};\n\nconst scopeEngine: SelectorEngine = {\n  matches(element: Element, args: (string | number | Selector)[], context: QueryContext, evaluator: SelectorEvaluator): boolean {\n    if (args.length !== 0)\n      throw new Error(`\"scope\" engine expects no arguments`);\n    const actualScope = context.originalScope || context.scope;\n    if (actualScope.nodeType === 9 /* Node.DOCUMENT_NODE */)\n      return element === (actualScope as Document).documentElement;\n    return element === actualScope;\n  },\n\n  query(context: QueryContext, args: (string | number | Selector)[], evaluator: SelectorEvaluator): Element[] {","sourceCodeStart":386,"sourceCodeEnd":422,"githubUrl":"https://github.com/microsoft/playwright/blob/c8fc3bf8d31542d59b4d4d9eaab1df93ff541dc6/packages/injected/src/selectorEvaluator.ts#L386-L422","documentation":"Error \"\"has\" engine expects non-empty selector list\" thrown in microsoft/playwright.","triggerScenarios":"Thrown at packages/injected/src/selectorEvaluator.ts:404 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"c8fc3bf8d31542d59b4d4d9eaab1df93ff541dc6","analyzedAt":"2026-08-12T07:26:36.950Z","schemaVersion":2},"datasetVersion":"2026-08-12T13:17:24.610Z"}