Telephone input

Learn how to create a telephone input.

Telephone input

Telephone input at a glance

Here's a telephone input with only the required parameter(s):

phone = TelInput(
  | question = What is your phone number?
)

Given below is another telephone input with all the available parameters. The parameter names are case insensitive, and the ones without values after = are boolean parameters. You can find details about all of them in the available parameters section.

phone* = TelInput(
  | question = What is your phone number?
  | description = Some description
  | fieldSize = sm
  | subfield
  | autofocus
  | placeholder = Some placeholder text
  | disabled
  | maxlength = 255
  | pattern = [a-zA-Z0-9\s]+
  | value = Some value
  | country = US
)

Basics of a form field

A form field is a Markdown paragraph in the following format:

{fieldName}{optionalAsterisk} = {fieldType}(
  {parameters}
)

• The {fieldName} is the name of the input. It is used as the key for the value of the input in the form data (which is submitted as JSON). The {fieldName} can also be used to reference the input's value in the template. It must adhere to the following rules:

  • Not start with a number

  • Not contain a dash or hyphen (-)

  • Not contain a space

• The {optionalAsterisk} is an * which (if provided) indicates that the field is required. If this is omitted, then the field becomes optional.

• The {fieldType} must be one of the following: TextInput, EmailInput, TelInput, NumberInput, SelectBox, ChoiceInput, PictureChoice, RatingInput or OpinionScale (case insensitive).

For example, here's a required email input form field with a class name added to the wrapping container:

[.col-6]
yourEmail* = EmailInput(
  | question = What is your email address?
  | description = Please make sure it's correct.
)

Your email is {$ yourEmail $}.

The following is not a valid form field because the empty line means that there are two Markdown paragraphs, and none of them follow the valid format:

address = TextInput(
  | question = What is your address?

  | description = ...
)

Parameters

Parameters are information provided within the (...) when creating form fields. They must be separated by the form-delimiter, which by default is |. The form-delimiter can be changed as a setting. For example, this would render the exact same email input from above:

#! form-delimiter = \\n

[.col-6]
yourEmail* = EmailInput(
  question = What is your email address?
  description = Please make sure it's correct.
)

Your email is {$ yourEmail $}.

Please note once again that parameter names are case insensitive, and boolean parameters only require their names to have effect (no need for values after =).

Available parameters

The following parameters are available for telephone inputs:

question

The main question of the form field. Here, the question is placed inside the main <label> element.

description

Any extra information that the user may need to fill out the form.

fieldSize

When set to sm, the font sizes of the question, description, and answer are made smaller. Can also be globally set via the #! field-size = sm setting.

subfield

Boolean parameter. When set, the question of the form field is made smaller. This is useful for creating subfields, especially inside .col-* classes. For example:

[.form-question]
What is your address?

[.col-8]
city* = TextInput(
  | question = City | subfield | placeholder = New York
)

[.col-4]
zip* = TextInput(
  | question = Zip | subfield | placeholder = 10001
)

autofocus

Boolean parameter. When set, the input will be automatically focused when the parent slide becomes active, or immediately after page load (in case of single page layout). Can also be globally set via the #! autofocus = all-slides setting (only for slides).

placeholder

Sets the placeholder attribute of the input. By default, a generic one is provided, but this can be used to override and set a custom one.

disabled

Boolean parameter. When set, the input is disabled.

maxlength

If set, this becomes the maximum number of allowed characters in the input.

pattern

If set, the input value must match the given pattern. Can be regex, such as pattern = [a-zA-Z0-9\s]+.

value

If set, this becomes the default value of the input.

country

Two letter country code which is used to create the example phone number as the placeholder of the input. If not set, US is used as the default with [phone] as the example placeholder number. Please note, the value of this parameter is also case insensitive. For example, phone = TelInput(country = bd) would have 01812-345678 as the example placeholder number.

Also note, this does not add any validation rules to the input—only the placeholder is affected. For custom validation of your phone numbers, please use the pattern parameter. For a full list of usable country codes, please see src/phone-number-placeholders.js.