I am having trouble referring to any variables with "-" in the variable name. I feel the answer is something very simple but I can't figure it out.

For Example

var headers = {
  "content-type": "application/json;charset=UTF-8",
  "content-length": "261",
  "connection": "close",
  "date": "Fri, 01 Apr 2022 09:12:56 GMT",
  "server": "nginx",
  "vary": "Accept-Encoding",
  "x-mbx-uuid": "88911a02-ff75-4cc0-b8ef-1ea4ab0edabd",
  "x-mbx-used-weight": "10",
  "x-mbx-used-weight-1m": "10"
}

to refer to an element, the following works

console.log(headers.server)

But the following doesnt work because javascript doesn't recognise - . How do I refer to x-mbx-used-weight-1m in this case?

console.log(headers.x-mbx-used-weight-1m)