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A full list of JavaScript operators with examples

Jobber
ServiceTitan
HouseCall Pro
Trusso
FieldPulse
Joist
LawnPilot Pro
Flat-price HVAC software that replaces ServiceTitan, Jobber, and Housecall Pro. Dispatch, memberships, estimates, mobile, QuickBooks sync. No contracts, no per-seat fees.

Which is more popular?
Based on our record, JavaScript Operator Lookup seems to be more popular. It has been mentioned 1 time since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | joshwcomeau.com | runacall.com |
| Pricing | — | |
| Company | — | Startup from the United States · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of JavaScript Operator Lookup yet.
Run a Call is field service management software built specifically for residential HVAC shops with 5 to 25 technicians. The wedge is the kitchen-table moment: a tablet-first estimate presentation techs use to sell tiered options on-site, lifting close rate and average ticket. Where ServiceTitan...
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


No analysis of JavaScript Operator Lookup yet.
Overall verdict
Why this product is good
Recommended for
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing JavaScript Operator Lookup and Run a Call.
Run a Call's answer:
ServiceTitan costs $40K+ in early termination fees, takes 6–12 months to onboard, and is priced for 20+ tech enterprise shops. Jobber and Housecall Pro are friendly but lack the dispatch board and pricebook depth HVAC shops need past 8 techs. Run a Call gives you ServiceTitan-grade ops without ServiceTitan-grade pain — flat price, no contracts, free white-glove migration, and founders on Slack instead of a CSM rotation. We publish pricing on the website. No demo gating.
Run a Call's answer:
Run a Call is built around the kitchen-table moment — the point in a service call where a tech presents options to a customer. The tablet-first estimate presentation isn't a bolted-on feature; it's the core wedge that drives close rate. Pair that with flat $499/mo pricing, no contracts, no per-tech fees, and days-not-months onboarding, and it's the first FSM built specifically for residential HVAC shops with 5 to 25 technicians.
Run a Call's answer:
Residential HVAC shops in the US with 5–25 technicians and $750K–$10M in annual revenue. Owner-operators who still answer phones on busy days and want to see close rate by tech on Monday morning. Typically migrating from ServiceTitan (overpaying, locked in), Jobber or Housecall Pro (outgrown), or paper and whiteboards (ready to digitize).
Run a Call's answer:
The HVAC shops we worked with were stuck. ServiceTitan trapped them in 2-year contracts with $40K early termination fees and onboardings that never finished. Jobber and Housecall Pro were easy to use but lacked the real dispatch board and kitchen-table presentation that drives revenue at 5+ techs. The 5–25 tech sweet spot had nowhere to go that didn't either over-serve enterprise or under-serve the most important moment of the job — the close. So we built it.
Run a Call's answer:
Share your experience with using JavaScript Operator Lookup and Run a Call. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


If you replace your || with ?? You should get the behaviour you are after. This is a good reference for what the operators do in js: https://joshwcomeau.com/operator-lookup. Source: about 5 years ago
Tracking Run a Call since Jun 2026.
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