window.postMessage and corresponding window.onmessage listeners enable secure communication between cross-origin windows, including IFRAMEs. The postMessage API is ubiquitous, used by popular JS widgets like media players (YouTube, Spotify) →
A client found a single recipient domain where every Marketo email went to Spam due to failing DKIM validation. (A bad DKIM signature should really result in the message being →
A client recently asked about connecting Marketo to Clay and we were dismayed at Clay’s official docs: See how they recommend Request Token Encoding: None? That’s totally wrong, →
Knowing if the current pageview is associated with a known lead vs. anonymous is key to a lot of cool personalization. For example, you can build the equivalent of “If →
At the moment of approval, fields on the $𝚕𝚎𝚊𝚍 object are empty strings (meaning "", not 𝑛𝑢𝑙𝑙). Your code needs to deal with that gracefully. →
Reminder (if you needed one) that newer doesn’t mean more predictable. →
Gotta love devs who don’t know Marketo but say “Just drop it in, trust us.” →
Troubleshooting slow-loading email images reveals a classic culprit. →