Struct JSContext 

pub struct JSContext { /* private fields */ }

JavaScript execution context.

This struct represents a JavaScript execution context. It is the top-level object for evaluating JavaScript code.

Can be obtained initially from View::lock_js_context.

Implementations

impl JSContext

pub fn new(lib: Arc<Library>) -> Self

Create a new JavaScript execution context.

pub fn global_object(&self) -> JSObject<'_>

Get the global object for this context.

pub fn global_context(&self) -> JSContext

Get the global context for this context.

pub fn name(&self) -> Option<JSString>

Get the name of this context.

A JSGlobalContext’s name is exposed when inspecting the context to make it easier to identify the context you would like to inspect.

The context may not have a name, in which case this method will return None.

pub fn is_inspectable(&self) -> bool

Gets whether the context is inspectable in Web Inspector.

pub fn evaluate_script(&self, script: &str) -> Result<JSValue<'_>, JSValue<'_>>

Evaluate a JavaScript script in this context.

If an exception is thrown during evaluation, it will be returned as an Err value, otherwise the result of the script evaluation will be returned as an Ok value.

pub fn check_script_syntax(&self, script: &str) -> Result<bool, JSValue<'_>>

Checks for syntax errors in a string of JavaScript.

true if the script is syntactically correct, otherwise false.

pub fn garbage_collect(&self)

Performs a JavaScript garbage collection.

JavaScript values that are on the machine stack, in a register, protected by JSValueProtect, set as the global object of an execution context, or reachable from any such value will not be collected.

During JavaScript execution, you are not required to call this function; the JavaScript engine will garbage collect as needed. JavaScript values created within a context group are automatically destroyed when the last reference to the context group is released.

Trait Implementations

impl Clone for JSContext

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for JSContext

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

Formats the value using the given formatter.

impl Drop for JSContext

fn drop(&mut self)

Executes the destructor for this type.