How to show custom error on lightning input?

How to show custom error on lightning input?

The basic idea is to have a lightning:input field and associated a lightning:formattedText field with it via aura:id. This formattedText has a css class that hides it (display:none). When the input field is filled out, onblur throws event, which you can capture.

Which is an example of a lightning input component?

Example. A lightning-input component creates an HTML element. This component supports HTML5 input types, including checkbox, date, datetime, time, email, file, password, search, tel, url, number, and toggle. The default is text. You can define an action for input events like blur, focus, and change.

What does Lightning input type mean in Salesforce?

Checkboxes let you select one or more options. lightning-input type=”checkbox” is useful for creating single checkboxes. If you are working with a group of checkboxes, use lightning-checkbox-group instead.

Are there client side validations in Lightning input?

According to the given doc, lightning:input does support client side validations. https://developer.salesforce.com/docs/atlas.en-us.lightning.meta/lightning/js_validate_fields.htm This is a bit of an old question now, but I’ve discovered another way which seems pretty legit.

When to return a valuemissing error in Lightning?

Error message to be displayed when the value is missing. The valueMissing error can be returned when you specify the required attribute for any input type. The minimum acceptable value for the input.

How does checkvalidity work in Lightning input field?

CheckValidity is the another seeded method which returns a boolean value based on the valid property in the validity attribute. The value only be true if the none of the error conditions are met. Go through the link for more details on the custom error message attributes in input component.

How to implement custom validation in Salesforce Lightning input?

The error message are defined based on the pattern mismatch, required, max length, min length, etc. attributes. The custom error message for the mentioned attributes can be defined in the corresponding messageWhenPatternMismatch, messageWhenTypeMismatch, messageWhenValueMissing, etc error message attributes.

What should phone number be in Lightning input?

The requirement I am trying to achieve is that phone number without spaces should be 11 digits. According to the given doc, lightning:input does support client side validations. https://developer.salesforce.com/docs/atlas.en-us.lightning.meta/lightning/js_validate_fields.htm

How does field validation work in Lightning aura?

Built-in field validation is available for the base components discussed in Creating a Form. Base components simplify input validation by providing attributes to define error conditions, enabling you to handle errors by checking the component’s validity state.

How to handle trigger and Validation rule error in Lightning component?

In lightning response object though the state value comes as ERROR but the message in the error object always says ‘Internal Server Error”. Here is an example to handle the Trigger and Validation Rule Error in apex controller to show error messages in Lightning Component.

How does the Lightning input field support requiredness?

lightning-input-field supports requiredness specified on the server and client. In record forms, a required field is displayed with a red asterisk next to the field label. If you interact with a required field but don’t enter a value, an error message is displayed below the field.

How to override display density in Lightning input field?

To override the display density of the parent form, use the variant attribute in lightning-input-field. When the parent form uses the compact density, you can reduce the whitespace between the label and field using the slds-form-element_1-col class on lightning-input-field.

What happens if you don’t enter a value in a lightning field?

If you interact with a required field but don’t enter a value, an error message is displayed below the field. Similarly, if you don’t interact with a required field and try to submit the form, an error message is displayed.

What does a lightning input component do in Salesforce?

Represents interactive controls that accept user input depending on the type attribute. A lightning:input component creates an HTML element. This component supports the following input types:

What happens when a field is filled out in Lightning?

When the input field is filled out, onblur throws event, which you can capture. The controller captures the field that threw the event (not shown in code, but I have five or six fields that have this same validation, so I generalized it a bit). Then run your own custom validation.

How to check if input is valid in Salesforce Lightning?

If the input is valid, clears any displayed error and returns true. Here’s a link to the full documentation and you should look for the Input Validation section: https://developer.salesforce.com/docs/component-library/bundle/lightning:input/documentation I suggest using reportValidity () because it does all the work for you.

How to set validity attribute in Lightning controller?

The validity attribute of lightning:input is not just for reading the validity, you can also set it. So, write the component like this: And then the controller like this: Then, you can write whatever logic you want in that handler method and the result is shown in the normal Lightning way.