Passing JSON object to spec results in error

Hi

When looking to use RedocStandalone, passing a json object to spec results in incorrect behaviour.

I am using a spec from:
https://raw.githubusercontent.com/OAI/OpenAPI-Specification/master/examples/v3.0/api-with-examples.json

ReDoc Version: 2.0.0-rc.45
npm --version: 6.14.8

Expected Output

Provide either:

• json object to spec
• or path/ url to specUrl

Should result in the docs being displayed.

Current Output

I get the following error:

Document must be valid OpenAPI 3.0.0 definition
Stack trace
Error: Document must be valid OpenAPI 3.0.0 definition
    at OpenAPIParser.validate (http://localhost:3000/static/js/0.chunk.js:101908:19)
    at new OpenAPIParser (http://localhost:3000/static/js/0.chunk.js:101895:16)
    at new SpecStore (http://localhost:3000/static/js/0.chunk.js:102219:25)
    at new AppStore (http://localhost:3000/static/js/0.chunk.js:105287:23)
    at StoreBuilder.makeStore (http://localhost:3000/static/js/0.chunk.js:103097:20)
    at StoreBuilder.render (http://localhost:3000/static/js/0.chunk.js:103183:25)
    at finishClassComponent (http://localhost:3000/static/js/0.chunk.js:71760:35)
    at updateClassComponent (http://localhost:3000/static/js/0.chunk.js:71713:28)
    at beginWork (http://localhost:3000/static/js/0.chunk.js:73298:20)
    at HTMLUnknownElement.callCallback (http://localhost:3000/static/js/0.chunk.js:58263:18)
    at Object.invokeGuardedCallbackDev (http://localhost:3000/static/js/0.chunk.js:58312:20)
    at invokeGuardedCallback (http://localhost:3000/static/js/0.chunk.js:58372:35)
    at beginWork$1 (http://localhost:3000/static/js/0.chunk.js:78114:11)
    at performUnitOfWork (http://localhost:3000/static/js/0.chunk.js:76950:16)
    at workLoopSync (http://localhost:3000/static/js/0.chunk.js:76887:9)
    at renderRootSync (http://localhost:3000/static/js/0.chunk.js:76853:11)
    at performSyncWorkOnRoot (http://localhost:3000/static/js/0.chunk.js:76470:22)
    at http://localhost:3000/static/js/0.chunk.js:65723:30
    at unstable_runWithPriority (http://localhost:3000/static/js/0.chunk.js:109251:16)
    at runWithPriority$1 (http://localhost:3000/static/js/0.chunk.js:65669:14)
    at flushSyncCallbackQueueImpl (http://localhost:3000/static/js/0.chunk.js:65718:13)
    at flushSyncCallbackQueue (http://localhost:3000/static/js/0.chunk.js:65706:7)
    at scheduleUpdateOnFiber (http://localhost:3000/static/js/0.chunk.js:76070:13)
    at Object.enqueueSetState (http://localhost:3000/static/js/0.chunk.js:66846:9)
    at StoreBuilder.push../node_modules/react/cjs/react.development.js.Component.setState (http://localhost:3000/static/js/0.chunk.js:86153:20)
    at StoreBuilder.<anonymous> (http://localhost:3000/static/js/0.chunk.js:103139:24)
    at step (http://localhost:3000/static/js/0.chunk.js:107933:17)
    at Object.next (http://localhost:3000/static/js/0.chunk.js:107864:14)
    at fulfilled (http://localhost:3000/static/js/0.chunk.js:107819:24)

Interestingly, passing the url to either spec or specUrl it works.

The way I am downloading the json:

  async function getJson(url) {
    const resp = await fetch(url);
    const json = await resp.json();

    if (resp.status !== 200) {
      throw Error(resp.message)
    };

    return json;
  }

When I console.log the output looks correct:

Any thoughts on this are appreciated - thanks!

Start at the RedocStandalone spec prop and follow the OpenAPIParser and SpecStore entries named in the stack trace. Reproduce the issue with the supplied fetched JSON object, compare it with the working URL input, and verify that passing the object renders the documentation without the validation error.