Differ

This package helps sending the HTML content of a page to a remote origin repeatedly. It keeps internal state of the last HTMLs it saw and only sends the delta.

const differ = require('delta-differ');
const diffClient = new differ.DiffClient((ticket) => {
    // this method can return a promise - presumably it would perform 
    // a remote call to another machine running the code - the
    // other machine knows what the state is by the passed ticket parameter
    // see the e2e tests for a full example
    return differ.delta(ticket);
});
const pageHtml = diffClient.sync();
// some time later after html changes...
const newPageHtml = diffClient.sync();

Syncing other things

The delta function accepts a second "getHtml" argument that's useful for getting something other than the page body's html.

Tests

Run the linter with npm run lint Run unit tests with npm run unit Run e2e tests with npm run e2e Run the benchmarks with npm run bench