Add header to every request in Postman in pre-request script

Question

I want to automatically add a header to every request in my whole collection using this pre-request script:

pm.request.headers.add({
    \'key\': \"myvar\",
             


        

Answer 1

This certainly works. Loose the inverted commas on key and value

pm.request.headers.add({
    key: "myvar",
    value: pm.environment.get("myvar")    
});