@a11ywatch/a11ywatch

v0.3.82

Published

9 months ago

A11yWatch lite sidecar for web accessibility automation.

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jeffmendez

accessibility accessibility-automation testing WCAG sidecar a11ywatch

sidecar

A11yWatch Lite native javascript sidecar

Getting started

Make sure to have either nodejs or bun installed. Protoc is required to install the crawler, depending on the OS an automatic installation is performed.

nodejs

node - v14.0 and up, pref node ^v18.

yarn add @a11ywatch/a11ywatch.
npx playwright install

bun

npx playwright install # we need pre-install scripts
bun install @a11ywatch/a11ywatch.

In order to build @a11ywatch/crawler >= 0.5.0, you need the protoc Protocol Buffers compiler, along with Protocol Buffers resource files.

Ubuntu

sudo apt update && sudo apt upgrade -y
sudo apt install -y protobuf-compiler libprotobuf-dev

Alpine Linux

sudo apk add protoc protobuf-dev

macOS

Assuming Homebrew is already installed. (If not, see instructions for installing Homebrew on the Homebrew website.)

brew install protobuf

optional

Use the packages exported methods, use a client, or your own handling of request like curl/fetch.

optional: start mongodb on port 27017.
optional: start redis on 6379.
optional: add scripts to .gitignore (auto generated javascript page fixes) or A11YWATCH_NO_STORE=false to disable storage.
optional: add DISABLE_HTTP=true env variable to prevent http server startup (disables OpenAPI & GraphQL)

Usage

import { scan, multiPageScan, crawlList } from "@a11ywatch/a11ywatch";

// single page website scan.
await scan({ url: "https://a11ywatch.com" });

// all pages
await multiPageScan({ url: "https://a11ywatch.com" });

// all pages and subdomains
await multiPageScan({
  url: "https://a11ywatch.com",
  subdomains: true,
});

// all pages and tld extensions
await multiPageScan({ url: "https://a11ywatch.com", tld: true });

// all pages, subdomains, and tld extensions
await multiPageScan({
  url: "https://a11ywatch.com",
  subdomains: true,
  tld: true,
});

// multi page scan with callback on each result asynchronously
const callback = ({ data }) => {
  console.log(data);
};
await multiPageScan(
  {
    url: "https://a11ywatch.com",
  },
  callback
);

// crawl a list of static urls - does not perform site wide scans
const pages = await crawlList({
  pages: [
    "https://a11ywatch.com",
    "https://newegg.com",
    "https://bun.sh",
    "https://nodejs.org",
  ],
  userId: 0,
});

You can also drill in to the specific modules like @a11ywatch/pagemind (accessibility service) and etc.

import { detectImage } from "@a11ywatch/mav/ai/detectImage";

// prediect an image from a base64. You can also pass in a url as the url key.
await detectImage({
  imageBase64:
    "data:image/jpeg;base64,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",
  height: 50,
  width: 50,
});

Jest

Here is an example of using A11yWatch with jest.

describe("accessibility suite", () => {
  // can scan a single website url
  test("passes web accessibility test for home page", async () => {
    const { scan } = await import("@a11ywatch/a11ywatch");

    const results = await scan({ url: "https://a11ywatch.com" });

    // expect to have no issues
    expect(results.data.issues.length).toBe(0);
  });

  // can scan an entire website
  test("passes web accessibility test entire website", async () => {
    const { multiPageScan } = await import("@a11ywatch/a11ywatch");

    await multiPageScan(
      {
        url: "https://jeffmendez.com",
        userId: data.id,
      },
      ({ data }) => {
        const issuesCount = data.issues.filter(
          (issue) => issue.type === "error"
        ).length;
        console.info(`${data.url}: ${data.issues.length}`);
        expect(issuesCount).toBeLessThan(4);
      }
    );
  });
});

Docker

You can run the suite with docker by running:

docker run -p 3280:3280 \
  -v ${PWD}:/a11ywatch/conf \
  -e SUPER_MODE=true \
  a11ywatch/a11ywatch

Example docker compose configuration:

version: "3.9"
services:
  a11ywatch:
    image: a11ywatch/a11ywatch
    ports:
      - 3280:3280

Validate scan:

curl --location --request POST 'http://localhost:3280/api/crawl' \
--header 'Transfer-Encoding: chunked' \
--header 'Content-Type: application/json' \
--header 'Authorization: $A11YWATCH_TOKEN' \
--data-raw '{
    "websiteUrl": "https://a11ywatch.com",
    "subdomains": false,
    "tld": false,
    "robots": false
}'

Packages exposed

The following packages can be imported to use directly to extend A11yWatch Lite.

Examples

View the bun example or nodejs example for a getting started point.

Environmental variables

You can update the env variables below to adjust the gRPC server ports and other application features.

# grpc configs
GRPC_HOST_PAGEMIND=127.0.0.1:50052
GRPC_HOST_MAV=127.0.0.1:50053
GRPC_HOST_CRAWLER=127.0.0.1:50055
# store js scripts for CDN
SCRIPTS_ENABLED=false
# disabling AI may drastically improve performance across certain pages
AI_DISABLED=false
# disable core http server API
DISABLE_HTTP=true
# unlock all features
SUPER_MODE=true
# prevent auto starting suite - must use initApplication manually when ready
A11YWATCH_AUTO_START=true
# disable storing scripts
A11YWATCH_NO_STORE=true
# disable db install if already started locally
DISABLE_POSTINSTALL=true
# do not store data and use memory db
A11YWATCH_MEMORY_ONLY=true
# enable screen recording to a directory
PAGEMIND_RECORD=true
# set the chrome host
CHROME_HOST=

Pipelines

We use dagger to build pipelines for builds, test, and deploys.

# deps check
dagger do deps
# build img
dagger do build
# push img locally
# make sure to have localhost listening - `docker run -d -p 2222:5000 --restart=always --name localregistry registry:2`
dagger do push
# now you can run `docker run localhost:2222/a11ywatch:latest`

Client

We bundled the client for a one stop install for javascript at @a11ywatch/a11ywatch/client.

import { setAPIToken, setA11yWatchURL, crawlWebsite, scanWebsite } from "@a11ywatch/a11ywatch/client"

// set at runtime to a new token - if you use the env variable below it is also set without the method
setAPIToken(process.env.A11YWATCH_TOKEN)
setA11yWatchURL("https://api.a11ywatch.com")

// single page audit
const audit = await scanWebsite({ url: "https://mywebsite.com" })
console.log(audit)

// stream multi page full website audit results
await crawlWebsite({ url: "https://mywebsite.com" }, (audit) => { 
  console.log(audit)
})

Help

When on node v18 and above the flag --no-experimental-fetch is required ex: node --no-experimental-fetch server.js.

If you run into issues with modules not loading try deleting all of the node_modules and running npm install again. Upon switching node versions certain modules need to be re-installed for the native compilation to work.

The project starts a valid A11yWatch Lite instance.

LICENSE

check the license file in the root of the project.