Events

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Events
Events were introduced in version 3.5.0. If you are using an older userTrack version you must upgrade it before you can use events.
Note: Currently the events are only stored and displayed per user in the dashboard. In the future versions you will be able to filter and generate charts based on those events. Until then, you can use MySQL to directly query the database.
Events allow you to store arbitrary data for a specific session or pageview.
The main difference between events and tags is that tags are unique strings stored per session, whereas events are complex objects saved per individual page visited.
UST.addEvent(eventData)
Example:
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// NOTE: Make sure this code snipped is added AFTER the tracking snippet
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UST.addEvent({
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    category: 'SHOP', // REQUIRED
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    action: 'PURCHASED', // REQUIRED
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    label: 'Football Shoes',
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    value: 49.99,
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    value_secondary: 15.99,
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    item_id: 'SHOE123',
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    data: { img: "prod/img/shoe.png" }
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});
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Input parameters
You can pass those values in the eventData argument:
Parameter
Type
Example value
Info
category
string - REQUIRED
"SHOP"
​
action
string - REQUIRED
"PURCHASED"
​
label
string - OPTIONAL
"Football Shoes"
​
value
number - OPTIONAL
49.99
eg. product price
value_secondary
number - OPTIONAL
15.99
eg. shipping costs/tax
item_id
string - OPTIONAL
"SHOE123"
eg. item SKU
data
string - OPTIONAL
{ img: "prod/img/shoe.png" }
This can be any object. 
Data types limits
strings (category, action, label, item_id) have a character limit of 128.
numbers (value and value_secondary) are stored as fixed precision decimal numbers. 
They always have 2 decimals and a maximum of 13 digits before the decimal.
Max decimal number format example: 9,999,999,999,999.99
The data field is stored as a MySQL TEXT variable and can have any size (limited by the database engine).
Note: The data field is automatically converted to JSON using JSON.stringify() on the client-side if the passed value is not already a string.
Autofilled values
Those values are automatically added by the server for each event
Name
Type
Info
id
UNSIGNED INTEGER
ID of the event
clientid
UNSIGNED INTEGER
ID of the client (session)
clientpageid
UNSIGNED INTEGER
ID of the client page (pageview)
date
DATETIME
Date and time when the event was added to the database
The events system is loosely opinionated, meaning that you can store values in any way you prefer. The system provides multiple string and number fields that you populate.
In the future, the value of some of those fields might gain a specific meaning in order to automatically generate and display specific charts. For example, the userTrack dashboard could automatically show "Revenue" as being the sum of "value" for events that have the action name "PURCHASED".
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