Turn a Slack reaction into browser proof
Let a simple approval reaction launch the next verification step.
Trigger
Message Reaction Added
Triggered when a reaction is added to a message in Slack. Supports optional filtering by channel and emoji name.
Action
Run Puppeteer Script
Tool to run a Puppeteer script and capture a screenshot. Use when automating headless browser tasks and needing a PNG output. Use after confirming the script logic.
Why this helps
Approved checks often still depend on someone remembering to run them.
- Connects approval to execution
- Reduces forgotten verification
- Returns visual evidence quickly
Setup
Build it in a few focused steps.
- 1Connect Slackbot and Customjs once.
- 2Create an automation named Reaction Browser Proof.
- 3Tell Notis to verify the reacted message contains an approved URL and script intent, then run Puppeteer and capture the result.
- 4Choose Message Reaction Added as the trigger and set the report destination.
- 5React to one test message to verify the flow.
Questions about this workflow
Can any reaction start the script?
Configure the trigger's optional emoji filter and require the expected approval reaction in the prompt.
What if approval context is missing?
The automation should stop and report what information is needed before running.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Slackbot to Customjs. A trigger fires from one place; an action lands in another.
Slackbot triggers
Customjs actions
Recurring trigger
Notis starts this workflow on a schedule, such as daily, weekly, or during business hours.
Authenticate CustomJS API Key
Tool to authenticate a CustomJS API key. Use when verifying a user's API key before making further requests.
Webhook trigger
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Convert HTML to PDF
Tool to convert HTML to a PDF document. Use when you need to generate a PDF from raw HTML. Returns raw PDF bytes suitable for download or storage.
New Channel Created Trigger
Triggered when a new channel is created in Slack.
Convert HTML to PNG
Tool to convert HTML string to PNG image. Use when you need a PNG from HTML after preparing your markup.
Channel Message Received
Triggered when a message is posted in a Slack channel (public, private, or multi-party IM). Does NOT match direct messages.
Capture webpage screenshot
Tool to capture a screenshot of a webpage. Use when you need a visual snapshot of a URL.
Direct Message Received
Triggered when a new direct message (DM) is sent to a user in Slack. Catches all DMs across all DM channels.
Merge multiple PDFs into one
Tool to merge multiple PDF files into a single PDF. Use when you have multiple PDF URLs and want one combined PDF.
Message Reaction Added
Triggered when a reaction is added to a message in Slack. Supports optional filtering by channel and emoji name.
Run Puppeteer Script
Tool to run a Puppeteer script and capture a screenshot. Use when automating headless browser tasks and needing a PNG output. Use after confirming the script logic.
Message Reaction Removed
Triggered when a reaction is removed from a message in Slack. Supports optional filtering by channel and emoji name.
Reaction Added Trigger
DEPRECATED: use `SLACK_MESSAGE_REACTION_ADDED` instead. Triggered when a reaction is added to a message in Slack.
Connect any two apps with Notis in the middle.
Slackbot and Customjs, or any other combination from 1,000+ integrations.
When this happens · Trigger
Do this · Action
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