Call Javascript code before native invocation

[rricamar]

I've been through the docs and I didn't find a way to call intermediate Javascript code before a native invocation, for example, if I have the following native functions:

// iOS
@objc func echo(_ call: CAPPluginCall) { // native implementation...

// Android
@PluginMethod
public void echo(PluginCall call) { // native implementation...

Is there a way to call inside of the plugin implementation (own npm repo) some Javascript code with custom logic before triggering these native calls? Something like:

// Some typescript file 

async echo(options: { value: string }): Promise<{ value: string }> {
  // Do any javascript custom/share logic to avoid duplicities non-dependant on native platform APIs
  // if (foo) { ... }
  
  // call Swift func on iOS, Java func on Android
  this.nativeEcho(...)
}