merge-headers

Easily merge HTTP headers

merge-headers is a utility function that merges all your headers (plain objects, Headers instances or in Arrays format) and gives you the possibility to remove specific headers without too much headache.

Usage

import mergeHeaders from 'merge-headers';

const oldHeaders = new Headers({
    'Content-Type': 'text/xml',
    'Authorization': 'basic'
});

// Remove `Authorization` header without altering `oldHeaders`
const newHeaders = mergeHeaders(oldHeaders, {
    'Authorization': undefined
});

console.log(newHeaders.has('Authorization'));
// => false

// Or just merge two headers object
const headers = mergeHeaders(oldHeaders, {
    'rainbow': 'rainbow'
});

console.log(headers.has('Autorization'));
// => true

console.log(headers.has('rainbow'));
// => true

API

mergeHeaders(...sources)

The sources are the same as what the Headers constructor can take.

A TypeError will be thrown if sources contains something else than an object.

Returns a Headers object.

Why?

This is mostly for convenience. It is much easier to do mergeHeaders() instead of deleting them one by one, thus mutating your headers instance. This way you create a new one with the exact headers you want.

Roadmap

• [x] Tests
• [x] Usage
• [ ] Advanced use cases