I have a NodeJS server running on port 3001 of my computer. I can use fetch to access a localhost endpoint, like this: fetch(/api_endpoint).

However, I also want to include url parameters in my GET request.

Normally, I could include url parameters by doing this:

const url = new URL(localhost:3001)

const params = { sources: JSON.stringify(this.state.sources), timeRange: JSON.stringify(this.state.timeRange), minReacts: this.state.minReacts }

url.search = new URLSearchParams(params)

let data = await fetch(url)

However, this throws an error:

Fetch API cannot load localhost:3001?sources=%5B%22Confessions%22%2C%22Summer+Confessions%22%2C%22Timely+Confessions%22%5D&timeRange=%5B%222017-01-12T23%3A35%3A07.666Z%22%2C%222019-01-12T23%3A35%3A07.667Z%22%5D&minReacts=20. URL scheme must be http or https for CORS request.

How can I use create a fetch request that works with localhost that also uses URL parameters?

Edit:

Adding http:// to the front doesn't fix the problem.

Access to fetch at 'http://localhost:3001/?sources=%5B%22Confessions%22%2C%22Summer+Confessions%22%2C%22Timely+Confessions%22%5D&timeRange=%5B%222017-01-13T00%3A00%3A17.309Z%22%2C%222019-01-13T00%3A00%3A17.310Z%22%5D&minReacts=20' from origin 'http://localhost:3000' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.