I'm experiencing an issue in Electron where window.webContents.send() behaves as expected on the first execution, but after I call it again the function runs twice, then three times, etc.

Here's a stripped back example of one of the menubar functions I'm using to tell the renderer to package data for saving.

Main.js

   {
      label: 'Save',
      click() {
         window.webContents.send('myChannel', myArgs); 
      }
   }

Renderer.js

   ipcRenderer.once('myChannel', (evt, myArgs) => {
      // package data for saving
   });

My understanding is that Electron is creating a new event handler each time I click save in the menubar. I can't seem to find any documentation on how to dispose the event handler in the electron docs.

Here's a link to a similar problem. The solution isn't of much help to me, as I need these functions to only be run when they're called from the menubar, not when the app first launches.

Thanks!