Update the readme.

readme.md

@@ -4,6 +4,11 @@
 
 A [terminating Apollo Link](https://apollographql.com/docs/react/api/link/introduction/#the-terminating-link) for [Apollo Client](https://apollographql.com/docs/react) that fetches a [GraphQL multipart request](https://github.com/jaydenseric/graphql-multipart-request-spec) if the GraphQL variables contain files (by default [`FileList`](https://developer.mozilla.org/en-US/docs/Web/API/FileList), [`File`](https://developer.mozilla.org/en-US/docs/Web/API/File), or [`Blob`](https://developer.mozilla.org/en-US/docs/Web/API/Blob) instances), or else fetches a regular [GraphQL POST or GET request](https://apollographql.com/docs/apollo-server/requests) (depending on the config and GraphQL operation).
 
+- [Installation](#installation)
+- [Examples](#examples)
+- [Requirements](#requirements)
+- [Exports](#exports)
+
 ## Installation
 
 To install with [npm](https://npmjs.com/get-npm), run:
@@ -12,6 +17,8 @@ To install with [npm](https://npmjs.com/get-npm), run:
 npm install apollo-upload-client
 ```
 
+Polyfill any required globals (see [_**Requirements**_](#requirements)) that are missing in your server and client environments.
+
 Remove any `uri`, `credentials`, or `headers` options from the [`ApolloClient` constructor](https://apollographql.com/docs/react/api/core/ApolloClient/#the-apolloclient-constructor).
 
 [Apollo Client](https://apollographql.com/docs/react) can only have 1 [terminating Apollo Link](https://apollographql.com/docs/react/api/link/introduction/#the-terminating-link) that sends the GraphQL requests; if one such as [`HttpLink`](https://apollographql.com/docs/react/api/link/apollo-link-http) is already setup, remove it.
@@ -20,7 +27,7 @@ Initialize the client with a [terminating Apollo Link](https://apollographql.com
 
 Also ensure the GraphQL server implements the [GraphQL multipart request spec](https://github.com/jaydenseric/graphql-multipart-request-spec) and that uploads are handled correctly in resolvers.
 
-## Usage
+## Examples
 
 Use [`FileList`](https://developer.mozilla.org/en-US/docs/Web/API/FileList), [`File`](https://developer.mozilla.org/en-US/docs/Web/API/File), or [`Blob`](https://developer.mozilla.org/en-US/docs/Web/API/Blob) instances anywhere within query or mutation variables to send a [GraphQL multipart request](https://github.com/jaydenseric/graphql-multipart-request-spec).
 
@@ -112,12 +119,12 @@ function UploadFile() {
 
 ## Requirements
 
-- [Node.js](https://nodejs.org): `^18.15.0 || >=20.4.0`
-- [Browsers](https://npm.im/browserslist): `> 0.5%, not OperaMini all, not IE > 0, not dead`
+- [Node.js](https://nodejs.org) versions `^18.15.0 || >=20.4.0`.
+- Browsers matching the [Browserslist](https://browsersl.ist) query [`> 0.5%, not OperaMini all, not dead`](https://browsersl.ist/?q=%3E+0.5%25%2C+not+OperaMini+all%2C+not+dead).
 
 Consider polyfilling:
 
-- [`Promise`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise)
+- [`AbortController`](https://developer.mozilla.org/en-US/docs/Web/API/AbortController)
 - [`fetch`](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API)
 - [`FormData`](https://developer.mozilla.org/en-US/docs/Web/API/FormData)