Enum JsTask 

pub enum JsTask {
    SetDocumentUrl {
        url: String,
    },
    SetOrigin {
        origin: String,
    },
    SetPermissions {
        permissions: Permissions,
    },
    SetViewport {
        width: f32,
        height: f32,
    },
    SetLanguage {
        language: String,
    },
    SetLayoutMetrics {
        metrics: HashMap<u64, JsLayoutMetrics>,
        computed_styles: HashMap<u64, Vec<(String, String)>>,
    },
    RunScript {
        source: String,
        label: Option<String>,
    },
    DispatchDomContentLoaded,
    DispatchWindowLoad,
    RunTimers,
    Click {
        dom_id: u64,
    },
    Scroll {
        dom_id: u64,
    },
    DispatchElementEvent {
        dom_id: u64,
        event_type: String,
    },
    ResolveFetch {
        id: u64,
        response: JsFetchResponse,
    },
    RejectFetch {
        id: u64,
        reason: String,
    },
    ResolveDevTools {
        id: u64,
        result: String,
    },
    ResolveIframe {
        dom_id: u64,
        html: String,
        url: String,
    },
    RejectIframe {
        dom_id: u64,
    },
    SetTracing {
        enabled: bool,
    },
    ClearTrace,
    EvaluateConsole {
        id: u64,
        source: String,
    },
    UpdateDom {
        snapshot: DomSnapshot,
    },
}

What the background JS thread should do next.

Variants

SetDocumentUrl

Set the URL exposed through document and related browser APIs.

Fields

url: String

SetOrigin

Set the serialized origin exposed through window/location/document.

Fields

origin: String

SetPermissions

Install the effective capabilities of the top-level document, inherited by any child frame.

Fields

permissions: Permissions

SetViewport

Update CSS-pixel dimensions exposed through the Window API.

Fields

width: f32

height: f32

SetLanguage

Update the language preferences exposed through navigator.

Fields

language: String

SetLayoutMetrics

Replace DOM geometry and computed styles exposed by measurement APIs.

Fields

metrics: HashMap<u64, JsLayoutMetrics>

computed_styles: HashMap<u64, Vec<(String, String)>>

RunScript

Execute a classic (blocking or deferred) script.

Fields

source: String

label: Option<String>

Human-readable source label shown in DevTools (e.g. script URL).

DispatchDomContentLoaded

Dispatch DOMContentLoaded to document listeners.

DispatchWindowLoad

Dispatch the window load event (fires window.onload).

RunTimers

Run timer callbacks whose deadlines have elapsed (coalescable).

Click

Dispatch a click on the element with the given JS-facing dom id.

Fields

dom_id: u64

Scroll

Dispatch a scroll event on the element with the given JS-facing dom id.

Fields

dom_id: u64

DispatchElementEvent

Dispatch an event on the element with the given JS-facing dom id.

Fields

dom_id: u64

event_type: String

ResolveFetch

Resolve a pending JavaScript fetch() with a network response.

Fields

id: u64

response: JsFetchResponse

RejectFetch

Reject a pending JavaScript fetch() after a network failure.

Fields

id: u64

reason: String

ResolveDevTools

Settle a pending DevTools inspection request with its JSON envelope.

Fields

id: u64

result: String

ResolveIframe

Parse fetched iframe HTML and install it as the host element’s contentDocument, recording the effective URL, then fire its load event.

Fields

dom_id: u64

html: String

url: String

RejectIframe

Mark an iframe load as failed so later contentDocument accesses do not keep re-queuing a fetch.

Fields

dom_id: u64

SetTracing

Start or stop JavaScript execution tracing.

Fields

enabled: bool

ClearTrace

Clear the buffered JavaScript execution trace.

EvaluateConsole

Evaluate a DevTools console expression in the page’s JavaScript runtime.

Fields

id: u64

source: String

UpdateDom

Replace the JS thread’s mirror DOM with the UI’s tree (write-backs).

Fields

snapshot: DomSnapshot

Trait Implementations

impl Debug for JsTask

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

Formats the value using the given formatter.