Fork me on GitHub

Conditional Forms

You can use JSON Logic to create complex conditionals and validation criteria.

Formio.createForm(document.getElementById('formio'), {
  components: [
    {
      "type": "textfield",
      "label": "Type \"Show\"",
      "description": "Must be exact, and case sensitive.",
      "key": "typeShow",
      "input": true,
      "inputType": "text",
      "validate": {
        "json": {
          "if": [
            {
              "==": [
                {
                  "var": "data.typeShow"
                },
                "Show"
              ]
            },
            true,
            "You must type 'Show'!"
          ]
        }
      }
    },
    {
      "type": "textfield",
      "label": "Type \"Me\"",
      "description": "Must be exact, and case sensitive.",
      "key": "typeMe",
      "input": true,
      "inputType": "text",
      "validate": {
        "json": {
          "if": [
            {
              "==": [
                {
                  "var": "data.typeMe"
                },
                "Me"
              ]
            },
            true,
            "You must type 'Me'!"
          ]
        }
      },
      "conditional": {
        "json": {
          "===": [
            {
              "var": "data.typeShow"
            },
            "Show"
          ]
        }
      }
    },
    {
      "type": "textfield",
      "label": "Type \"The\"",
      "description": "Must be exact, and case sensitive.",
      "key": "typeThe",
      "input": true,
      "inputType": "text",
      "validate": {
        "json": {
          "if": [
            {
              "==": [
                {
                  "var": "data.typeThe"
                },
                "The"
              ]
            },
            true,
            "You must type 'The'!"
          ]
        }
      },
      "conditional": {
        "json": {
          "===": [
            {
              "var": "data.typeMe"
            },
            "Me"
          ]
        }
      }
    },
    {
      "type": "textfield",
      "input": true,
      "inputType": "text",
      "label": "Type \"Monkey!\"",
      "description": "Don't forget the '!'.",
      "key": "typeMonkey",
      "validate": {
        "json": {
          "if": [
            {
              "==": [
                {
                  "var": "data.typeMonkey"
                },
                "Monkey!"
              ]
            },
            true,
            "You must type 'Monkey!'"
          ]
        }
      },
      "conditional": {
        "json": {
          "===": [
            {
              "var": "data.typeThe"
            },
            "The"
          ]
        }
      }
    },
    {
      "key": "monkey",
      "input": false,
      "tag": "img",
      "attrs": [
        {
          "attr": "src",
          "value": "https://ichef.bbci.co.uk/news/660/cpsprodpb/025B/production/_85730600_monkey2.jpg"
        },
        {
          "attr": "style",
          "value": "width: 100%;"
        }
      ],
      "className": "",
      "content": "",
      "type": "htmlelement",
      "conditional": {
        "json": {
          "===": [
            {
              "var": "data.typeMonkey"
            },
            "Monkey!"
          ]
        }
      }
    },
    {
      "key": "submit",
      "type": "button",
      "action": "submit",
      "label": "Submit",
      "theme": "primary"
    }
  ]
});

Result


powered by

Copyright © Form.io LLC 2019. All rights reserved

Renderer v