Struct WaitForFunctionBuilder 

pub struct WaitForFunctionBuilder<'a> { /* private fields */ }

Builder for wait_for_function.

Implementations

impl<'a> WaitForFunctionBuilder<'a>

pub fn arg<A: Serialize>(self, arg: A) -> Self

Set an argument to pass to the function.

pub fn timeout(self, timeout: Duration) -> Self

Set the timeout.

pub fn polling(self, polling: Polling) -> Self

Set the polling mode.

pub async fn wait(self) -> Result<Option<JsHandle>, PageError>

Wait for the function to return a truthy value.

Returns Ok(Some(JsHandle)) when the result is a truthy object (DOM elements, objects, arrays). Returns Ok(None) when the result is a truthy primitive (booleans, numbers, strings). Primitive values have no object handle in the JavaScript runtime.

Example

// Wait for a condition - primitives return None
let _handle = page.wait_for_function("() => document.body.innerText.includes('loaded')")
    .wait()
    .await?;
// handle is None because `.includes()` returns a boolean

// Wait for an element - objects return Some(JsHandle)
let handle = page.wait_for_function("() => document.querySelector('.ready')")
    .wait()
    .await?;
// handle is Some(JsHandle) referencing the element

Trait Implementations

impl<'a> Debug for WaitForFunctionBuilder<'a>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.