This issue pertains to the following package(s):

• GraphQL Playground - Electron App
• GraphQL Playground HTML
• GraphQL Playground
• GraphQL Playground Express Middleware
• GraphQL Playground Hapi Middleware
• GraphQL Playground Koa Middleware
• GraphQL Playground Lambda Middleware

Setup:

app.use('/', expressPlayground({
  endpoint: '/',
  settings: {
    'request.credentials': 'include'
  }
}));

The generated code confirms that the option is being passed:

GraphQLPlayground.init(root, {
  "endpoint": "/",
  "settings": {
    "request.credentials": "include"
  },
  "version": "1.7.2",
  "canSaveConfig": false
})

However, viewing the configuration in the application (browser) shows that the setting did not have effect:

{
  "general.betaUpdates": false,
  "editor.cursorShape": "line",
  "editor.fontSize": 14,
  "editor.fontFamily": "'Source Code Pro', 'Consolas', 'Inconsolata', 'Droid Sans Mono', 'Monaco', monospace",
  "editor.theme": "dark",
  "editor.reuseHeaders": true,
  "prettier.printWidth": 80,
  "request.credentials": "omit",
  "tracing.hideTracingResponse": true
}

I have tried reseting the local storage values with no effect.

Changing the configuration using the application itself makes it work as expected for that local session.

The issue appears to be that GraphQLPlayground.init ignores request.credentials setting.

Related issues:

• Cookies are not being sent in Playground Express #748 Different description, but I suspect it is the same underlying reason.