Custom control not validating mike dating

I am a Google Developer Expert in Angular, as well as founding consultant and trainer at Angular Training where I help web development teams learn and become fluent with Angular.

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The above form would be invalid as long as the user does not enter a credit card number that passes our validation criteria.

Now let’s add some error handling to render the right error message from our validator function: My name is Alain Chautard.

Hi, I'm using a Rad Grid with a popup form for editing and inserting records based on the excellent Edit Form types demo.

At first, I put the functions in the user control (ascx file) but this is obviously not the thing to do because I got an error when the functions were called saying that they were undefined.The validator is going to make sure that a credit card number has 16 digits and that it comes from an accepted credit card company.In order to perform such validation, we have to implement a validator function that has the following signature: That’s the method signature used for both template-driven and reactive forms.This post will go over how to create a custom input component which supports validation and is compatible with both ng Model forms and Reactive Forms.As an example we will create a custom textarea component, where the validation checks that the user input is a valid JSON string.

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