JavaScript Utilities

This section documents the utilities functions available within the JavaScript SDK

Introduction

The Form.io Utilities class is a part of the JavaScript SDK, but provides a number of methods that makes working with Form.io forms within your applications easier.

Installation

To install the Utilities, you can either import them directly into your application as follows.

import Utils from 'formiojs/utils';

or they can be used as part of the Form.io renderer by including the following script in your application.

<script src="https://cdn.form.io/formiojs/formio.form.min.js"></script>

and then you can find the Utilities methods as part of the Utils property on the Formio object.

Formio.Utils.eachComponent(....)

Utility Functions

The following are common functions that can be used within the Form.io Utilities library.

eachComponent(components, fn, [includeAll])

Calls fn(component) for each component in components, accounting for nested layout components. (Does not call for layout components themselves, unless includeAll is true).

Parameter	Description
components	An array of JSON form components to iterate over.
fn	The function to call for each input component.
includeAll	Boolean to indicate if we should include all components including layout components.

The current data path of the element. Example: data.user.firstName

var utils = require('formiojs/utils');
utils.eachComponent(form.components, function(component) {
  // Do something...
})

getComponent(components, key)

Returns the component with the given key or undefined if not found.

Parameter	Description
components	An array of JSON form components to iterate over.
key	The key of the component you would like to retrieve.

var utils = require('formiojs/utils');
var component = utils.getComponent(form.components, 'myKey');

findComponents(components, query)

Returns an array of components that match the find query criteria. This query is very similar to MongoDB where if you wish to find a nested query, you would provide the key as the path of the property using dot notation.

Parameter	Description
components	An array of JSON form components to iterate over.
query	A JSON object to use as a query to find a certain component within a form.

Here is an example.

// Find all textfields with a specific custom property.
var utils = require('formiojs/utils');
var comps = utils.findComponents(form.components, {
  'type': 'textfield',
  'properties.objectId': '2345'
});

// Should return all textfield components with 'properties.objectId' = '2345'.
console.log(comps);

searchComponents(components, query)

Finds a component provided a query of properties of that component.

Parameter	Description
components	An array of JSON form components to iterate over.
query	The query to pass to matchComponent.

matchComponent(component, query)

Matches if a component matches the query.

Parameter	Description
component	A component JSON you would like to match against a query.
query	A JSON query to use as the match query.

const component = {
    type: 'textfield',
    key: 'firstName',
    label: 'First Name'
};
if (utils.matchComponent(component, {
    key: 'firstName
}) {
    console.log('The component matches!!');
}

flattenComponents(components, includeAll)

Returns a key-value object where the keys are the keys for each component in components and each key points to the corresponding component. This includes nested components as well. Pass true for includeAll if you want to include layout components.

Parameter	Description
components	An array of JSON form components to iterate over.
includeAll	Boolean to indicate if you wish to include all components including layout components.

var utils = require('formiojs/utils');
var flattened = utils.flattenComponents(form.components);
console.log(flattened['myNestedComponent']);

isLayoutComponent(component)

Determine if a component is a layout component.

Parameter	Description
component	The component JSON to determine if this is a layout component

var utils = require('formiojs/utils');
var layoutComponent = utils.isLayoutComponent(form.components[0]);
console.log(layoutComponent);

getValue(submission, key)

Get the value for a components API key, from the given submission. Recursively searches the submission for the key.

Parameter	Description
submission	The submission JSON object
key	The component key you would like to fetch the value from within the submission.

var utils = require('formiojs/utils');
var value = utils.getValue(submission, 'myComponent'); // The value or undefined.

parseFloat(value)

Extension of standard parseFloat function, that also clears input string. Useful for Currency component.

Parameter	Description
value	The value you would like to parse.

utils.parseFloat('12,345,678.90'); // -> 12345678.90

formatAsCurrency(value)

Formats provided value in way how Currency component uses it.

Parameter	Description
value	The value you would like to format.

utils.formatAsCurrency(123.4); // -> '123.40'
utils.formatAsCurrency(12345678.9); // -> '12,345,678.90'
utils.formatAsCurrency(12345678.915); // -> '12,345,678.92'
utils.formatAsCurrency('12345678.915'); // -> '12,345,678.92'

escapeRegExCharacters(value)

Escapes RegEx characters in provided String value.

Parameter	Description
value	The value you would like to escape the regex characters from.

utils.escapeRegExCharacters('[form.io](https://form.io/)'); // -> '\[form\.io\]\(https:\/\/form\.io\)'

boolValue(value)

Determines the boolean value of a setting.

isMongoId(text)

Check to see if an ID is a mongoID.

checkCondition(component, row, data, form, instance)

Checks the conditions for a provided component and data.

Parameter	Description
component	The component JSON
row	Contextual row data
data	Full submission data
form	The form JSON schema
instance	The component instance this method is being executed with.

unescapeHTML(str)

Unescape HTML characters like <, >, & and etc.

convertStringToHTMLElement(str, selector)

Make HTML element from string

guid()

Generate a GUID

isValidDate(date)

Checks a date to see if it is valid.

formatDate(value, format, timezone, flatPickrInputFormat)

Format a date provided a value, format, and timezone object.

getBrowserInfo()

Get the browser name and version

isInputComponent(componentJson)

Checks to see if a component JSON is an input component.