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psi

(★ 3,101)

PageSpeed Insights Reporting for Node

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Download Latest Version (.zip)

- - cli.js
  - json.js
  - tap.js
- options-handler.js
- output.js
- string-utils.js
- utils.js
- - response.json
- api-response.test.js
- format.test.js
- index.test.js
- options-handler.test.js
- string-utils.test.js
- utils.test.js
.editorconfig
.gitattributes
.gitignore
.npmrc
.travis.yml
cli.js
index.js
LICENSE
package.json
README.md
screenshot.png

# Installation Guide

1. Get the code

git clone https://github.com/GoogleChromeLabs/psi

Downloads the entire project code from GitHub to your computer.

cd psi

Moves into the project folder you just downloaded.

2. Node.js

Easy Recommended

Prerequisites

Git Needed to download the project code from GitHub.
Node.js Node.js must be installed to use npm. The LTS version is recommended.

$ npm install psi

Downloads and installs the libraries listed in package.json.

$ npm install --global psi

Downloads and installs the libraries listed in package.json.

✅ After running the command, open the address shown in the terminal (usually something like http://localhost:3000) in your browser.

Pulled directly from this repo's README.

// repository documentation

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# psi [![Build Status](https://travis-ci.org/GoogleChromeLabs/psi.svg?branch=master)](https://travis-ci.org/GoogleChromeLabs/psi) [![NPM psi package](https://img.shields.io/npm/v/psi.svg)](https://npmjs.org/package/psi)

> PageSpeed Insights with reporting

![](https://raw.githubusercontent.com/GoogleChromeLabs/psi/master/screenshot.png)

Run mobile and desktop performance tests for your deployed site using [Google PageSpeed Insights v5](https://developers.google.com/speed/docs/insights/v5/about) with tidy reporting for your build process.

## Install

```
$ npm install psi
```

## Usage

```js
const psi = require('psi');

(async () => {
  // Get the PageSpeed Insights report
  const { data } = await psi('https://theverge.com');
  console.log('Speed score:', data.lighthouseResult.categories.performance.score);

// Output a formatted report to the terminal
  await psi.output('https://theverge.com');
  console.log('Done');

// Supply options to PSI and get back speed
  const data2 = await psi('https://theverge.com', {
    nokey: 'true',
    strategy: 'desktop'
  });
  console.log('Speed score:', data2.data.lighthouseResult.categories.performance.score);
})();
```

As of PSI 2.x, we expose both the PageSpeed Insights speed and usability scores. The latter is based on [usability rules](https://developers.google.com/speed/docs/insights/rules) that score a page based on factors like the presence of a sensible mobile [viewport](https://developers.google.com/speed/docs/insights/ConfigureViewport).

## API

### psi(url, [options])

Returns a promise for the response data from Google PageSpeed Insights.

#### url

Type: `string`

URL of the page for which the PageSpeed Insights API should generate results.

#### options

Type: `Object`

##### key

Type: `string`<br>
Default: Free tier

When using this module for a production-level build process, registering for an API key from the [Google Developer Console](https://developers.google.com/speed/docs/insights/v1/getting_started#auth) is recommended.

##### strategy

Type: `string`<br>
Default: `mobile`<br>
Values: `mobile` `desktop`

Strategy to use when analyzing the page.

##### locale

Type: `string`<br>
Default: `en_US`

Locale results should be generated in.

##### threshold

Type: `number`<br>
Default: `70`

Threshold score to pass the PageSpeed test. Useful for setting a performance budget.

##### links

Type: `boolean`<br>
Default: `false`

If passed adds links with more info about opportunities. Useful for checking documentation about opportunities.

### psi.output(url, [options])

Output the formatted report to the terminal.

Returns a promise for the response data from Google PageSpeed Insights.

`url` and `options` are the same as `psi()`.

## CLI

```
$ npm install --global psi
```

```
$ psi --help

Usage
    $ psi <url>

Options
    --key        Google API Key. By default the free tier is used
    --strategy   Strategy to use when analyzing the page: mobile|desktop
    --format     Output format: cli|json|tap
    --locale     Locale results should be generated in
    --threshold  Threshold score to pass the PageSpeed test

Example
    $ psi https://addyosmani.com --strategy=mobile
```

## Common Use cases

<details>
 <summary>Getting PSI into your build process.</summary><br>

A sample [Gulp](https://github.com/addyosmani/psi-gulp-sample) project using PSI is available.

If you use Grunt, [`grunt-pagespeed`](https://github.com/jrcryer/grunt-pagespeed) is a task by James Cryer that uses PSI under the hood.

For testing local projects, we recommend using [`psi-ngrok`](https://github.com/denar90/psi-ngrok) or [`ngrok`](http://www.jamescryer.com/2014/06/12/grunt-pagespeed-and-ngrok-locally-testing/).
</details>

<details>
  <summary>Getting filmstrips</summary>

**Filmstrips** are returned by the v5 API as data uri's but the psi tool does not expose them on the cli. If you want to get **filmstrips** (or any audit details) you can require `psi` and get them from the `audits` object:

```javascript
const psi = require('psi');

(async () => {
  // Get the PageSpeed Insights report
  const {data} = await psi('https://theverge.com');
  console.log(data.lighthouseResult.audits['screenshot-thumbnails'].details.items);
})();
```

</details>

## License

Apache-2.0 - Copyright 2015 Google Inc