Functional Programming

You can use JSONata Functional programming to compare values or display data based on certain conditions. You can quickly make any logical statements, and based on the result, you can perform different actions.

Configuration

Result	Expression
Determine if the value is bigger or smaller than a certain number	"[email protected] > 10 ? 'Number is bigger':'Number is lower'"
Variables	="<div style='font-size: 40px'>Welcome on board <b>" & @ctx.datasources.html.name & "</b> - " & @ctx.datasources.html.email & "</div>

Be careful when using complex expressions, such as expressions that iterate one datasource across another, as your solution performance could become slower. To avoid this, try to use the datasource queries to get the desired result rather than an expression.

Examples and code snippets

Compare values

Functional expressions

In this example we determine if the value for entity.field is bigger or smaller that 10.

See the full code sample in GitHub

expression.jigx

datasources:
  mydata: 
    type: datasource.static
    options:
      data:
        - name: Jane Stevens
          title: Doctor
          email: [email protected]
          number: 0.64734
          number2: 12
          color: blue
          time: '2021-11-07T15:07:54.972Z'
          array: [5,1,2,3,7,9]

children:
  - type: component.entity
    options:
      children:
        - type: component.entity-field
          options:
            label: Functional expression
            value: "[email protected] > 10 
                    ? 'Number is bigger':'Number is lower'"

Variables in content

Content

This example shows how to write variables in HTML content.

See the full code sample in GitHub.

variablesInContent.jigx

source:
  documentType: HTML
  content: |
    ="<div style='font-size: 40px'>Welcome on board 
    <b>" & @ctx.datasources.html.name & "</b>
     - " & @ctx.datasources.html.email &
    "</div>
    <br>
    <img src='https://chart.googleapis.com/chart?cht=qr&chl=id"&@ctx.datasources.html.itemId&"&chs=380x380&choe=UTF-8&chld=L|2' alt='qr code'>
    <a href='https://www.qr-code-generator.com' border='0' style='cursor:default'  rel='nofollow'></a>
    <br>"  & @ctx.datasources.html.itemId

Multiple select in a dropdown

Multiple selector expression

In this example, we use the notation in which we select the instanceId of our component from the components, and extract the selected from the state of the component, then choose the required value. For example id, name,...

See the full code sample in GitHub.

multipleSelect.jigx

children:
  - type: component.form
    instanceId: selected-people-form
    options:
      children:
        - type: component.dropdown
          instanceId: selected-people-dropdown
          options:
            label: Select people
            data: [email protected]
            isMultiple: true
            item:
              type: component.dropdown-item
              options:
                title: [email protected] & ' ' & @ctx.current.item.lastname
                value: [email protected]
                leftElement: 
                  element: avatar
                  text: =$substring(@ctx.current.item.firstname, 0, 1) & $substring(@ctx.current.item.lastname, 0, 1)
                  uri: [email protected]