fallbacks.md

title
Fallbacks rules definition

A data field can be defined by more than one rule that will be used as fallback rules:

const mql = require('@microlink/mql')

const github = username =>
  mql(`https://github.com/${username}`, {
    data: {
      avatar: [
        {
          selector: 'meta[name="twitter:image:src"]:not([content=""])',
          attr: 'content',
          type: 'image'
        },
        {
          selector: 'meta[property="og:image"]:not([content=""])',
          attr: 'content',
          type: 'image'
        }
      ]
    }
  })

const username = 'kikobeats'
const { response, data } = await github(username)

console.log(`GitHub avatar for @${username}: ${data.avatar.url} (${data.avatar.size_pretty})`)

The rules provided under the same data value will be evaluated respecting the order:

• If the first rule fails, then it fallback in the second rule.
• If the second rule fails, time to fallback in the third rule.
• etc

Being the value obtained the first rule that satisfies the condition successfully, if that's possible.