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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.
What do you need to know about aura components?
The Aura Components Basics Trailhead module walks you through building a form for creating an expense record. Client-side field validation provides an initial check for user data before submitting it to the server. Implement your own server-side validation to ensure that user data is saved in the expected format.
What does submit button handler do in aura?
The submit button handler checks the validity of each component registered in the aura id named ‘field’. Reduce is standard Javascript array function that reduces the array values into a single output values based on the defined callback.
Where does the error message Go in Lightning aura?
The message in the error is displayed to the user in a dynamically created ui:message component. The body of the ui:message is a ui:outputText component containing the error text.
When is an input field in Lightning is invalid?
A lightning:input field that expects a certain data type is invalid if an incorrect data format is entered. For example, the email type on lightning:input expects an email address and the number type expects a number.
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.
How to retain input values during custom flow screen Lightning?
Previous inputs from user get lost when the component rerenders. So in order to get around this we can use SessionStorage to store the input values. With SessionStorage, web applications can store data locally within the user’s browser per session. To know more, follow this link: