[−][src]Function deno_core::json_op_sync
pub fn json_op_sync<F>(op_fn: F) -> Box<OpFn> where
F: Fn(&mut OpState, Value, &mut [ZeroCopyBuf]) -> Result<Value, AnyError> + 'static,
Creates an op that passes data synchronously using JSON.
The provided function op_fn
has the following parameters:
&mut OpState
: the op state, can be used to read/write resources in the runtime from an op.Value
: the JSON value that is passed to the Rust function.&mut [ZeroCopyBuf]
: raw bytes passed along, usually not needed if the JSON value is used.
op_fn
returns a JSON value, which is directly returned to JavaScript.
When registering an op like this...
ⓘ
let mut runtime = JsRuntime::new(...); runtime.register_op("hello", deno_core::json_op_sync(Self::hello_op));
...it can be invoked from JS using the provided name, for example:
Deno.core.ops();
let result = Deno.core.jsonOpSync("function_name", args);
The Deno.core.ops()
statement is needed once before any op calls, for initialization.
A more complete example is available in the examples directory.