next-csrf
Version:
CSRF mitigation library for Next.js
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Markdown
# AMP Runtime Version
[](https://badge.fury.io/js/%40ampproject%2Ftoolbox-runtime-version)
Use it to query `cdn.ampproject.org` for the current release or canary version of the AMP Runtime. Uses a stale-while-revalidate caching strategy to avoid network requests in the critical path.
You can use the API to re-write AMP runtime URLs to their versioned counter parts to improve browser caching, e.g. to replace:
```
https://cdn.ampproject.org/v0.css
```
with:
```
https://cdn.ampproject.org/rtv/001515617716922/v0.css
```
## Installation
Install via:
```sh
npm install @ampproject/toolbox-runtime-version
```
## Usage
Basic usage:
```js
const runtimeVersion = require('@ampproject/toolbox-runtime-version');
// Release version
runtimeVersion.currentVersion().then(version => {
console.log(version);
});
// Canary version
runtimeVersion.currentVersion({canary: true}).then(version => {
console.log(version);
});
// Rewriting cache URLs
const ampRuntimeUrl = 'https://cdn.ampproject.org/v0.js';
const version = await runtimeVersion.currentVersion();
const versionedAmpRuntimeUrl = ampRuntimeUrl.replace(
'https://cdn.ampproject.org/',
'https://cdn.ampproject.org/rtv/' + version + '/'
);
console.log(versionedAmpRuntimeUrl);
```