Params Validator element

The goal of the Validator element is to ensure that the user has provided the necessary and properly formatted information needed to successfully complete an operation.

The Validator can only be used in combination with other fields:

• Params Input field.
• Params Suggestbox field.
• Params Checkbox field.
• Params TextArea field.
• Params Select field.

Available validators:

name	Description
req	Required value.
alpha	Alphabetic value.
alphanum	Alphanumeric value.
dec	Decimal value.
num	Numeric value.
email	Email value.
url	URL value.
maxlen	Set the maximum length allowed.
minlen	Set the minimum required length.
lt	Less than.
gt	Greater than.
min	Minimum value.
max	Maximum value.
regexp	Regular expression.
plugin	Create your own form validator. More information at Creating your own Form Validator plugin.

• Parent:

Basic example

• Value required: “req”.
• Value must be a decimal: “dec”.
• The maximum length of the decimal value is 6 digits: “maxlen”.

<input label="Decimal value" name="decimal">
    <validator type="dec"/>
    <validator type="req"/>
    <validator type="maxlen" parameter="6"/>
</input>

Regular expression

If you want a validation that is not included in these predefined ones, you can use a regular expression. For example, imagine you want to restrict an input to lowercase ASCII values:

<input label="Lowercase value" name="regExp">
    <validator type="regexp" parameter="[a-z]+" />
</input>