Typebot · Written review
Inline Variable Formatting Is Typebot's Most Underrated Feature
TL;DR — the 20-second version
Typebot's inline variable formatting lets you write JavaScript directly inside any text block — fallbacks, ternaries, transforms — no extra blocks. Here's why I build with it every day.
Most people use Typebot like a flow chart: one block per idea, variables set here, displayed there, a “Script” block whenever the logic gets spicy. That works — until your flow is forty blocks of scaffolding around three lines of actual logic.
The video covers the feature that changed how I build: inline variable formatting — JavaScript, evaluated directly inside any text block.
What it actually is
Anywhere you can type a variable in Typebot, you can also type an expression. That means you can:
- Fall back gracefully —
{{Name === undefined ? "there" : Name}}turns “Hey , welcome back!” into “Hey there, welcome back!” without a single extra block. - Transform on the spot — upper-case a coupon code, format a date, trim whitespace, all inline.
- Branch with ternaries — a greeting that changes based on a score or a plan tier, written in one line inside the bubble itself.
No “Set variable” block. No “Script” block. The logic lives exactly where the reader sees the output.
Why I think it’s underrated
Every extra block in a chat flow is a place to click, a thing to name, and a place to break. Inline expressions collapse all of that into the message itself. In the video I refactor a flow that needed three blocks per conditional greeting into one block that handles every case. Fewer blocks, fewer bugs, faster edits.
It also changes who can maintain a bot. A teammate can read a bubble that says Hey {{Name ? Name : "there"}} and understand it without tracing the flow graph.
The gotchas nobody mentions
- Readability has a ceiling. The moment an inline expression needs a second ternary, it belongs in a Set variable block. Inline is for one-liners, not mini-programs.
- Undefined variables fail silently — which is exactly why the fallback pattern is the first thing the video demonstrates. Always ask: what does this show if the variable is empty?
- Quoting matters. Nesting quotes inside a text block that’s already wrapped in quotes will bite you. Use single quotes inside expressions.
Who this is for
If you’ve built more than two Typebot flows, you’ve already felt the pain this solves. If you’re brand new, learn blocks first — then this, immediately. It’s the difference between using Typebot and thinking in it.