Waits for a JavaScript function or predicate to return a truthy value when executed in the page’s context. Example: waitForFunction(functionOrPredicate: "() => window.myAppInitialized === true") Returns true if the function returns truthy within the timeout.

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Definition

waitForFunction(
  functionOrPredicate: String!
  arg: JSON
  options: WaitForFunctionOptions
): Boolean!

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Arguments

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functionOrPredicate

String! A string containing the JavaScript function or predicate to evaluate. It should return a truthy value when the condition is met. Example: "() => document.querySelector('#dynamicElement') !== null"

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arg

JSON An optional JSON serializable argument to pass to the function.

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options

WaitForFunctionOptions Options for waiting, such as polling interval and timeout.

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Returns

Boolean! The Boolean scalar type represents true or false.