tre-watch-heads

Observe mutable ssb messages

const WatchHeads = require('tre-watch-heads')
const h = require('mutant/html-element')
const computed = require('mutant/computed')

// pass your ssb client instance
const head = WatchHeads(ssb)

// head() takes a revisionRoot and returns a mutant-compatible observable
// This is how you get the revisionRoot from any ssb message, mutated or not
const revRoot = kv.value.content.revisionRoot || kv.key

// html will update in realtime whenever we receive a new revision of this particular message
document.body.appendChild(
  h('div', [
    h('div', 'latest version:'),
    computed(head(revRoot), kvm => {
      // 'kvm' stands for key/value/meta
      const text = kvm && kvm.value.content.text
      const isForked = kvm && kvm.meta.forked
      return [
        h('span', isForked ? 'forked' : 'not forked'),
        h('div', text)
      ]
    })
  ])
)

// When the element is removed from the dom, the underlying pull-stream
// will be aborted automatically

See Also:

• ssb-revisions
• mutant
• collect-mutations

License: ISC