Join Justin Schwartzenberger for an in-depth discussion in this video Validation—built in, part of Angular 2 Essential Training (2016).
- [Voiceover] The Angular forms architecture has support…for two approaches to validation.…Built-in validation and custom validation.…You can apply validators to control objects in your form…control group.…Let's start by adding some built-in validators to the form.…The built-in validators are available on the…validators class.…Found in the angular2/common module bundle.…In the media-item-form.component.ts file…we add validators to the import list at the top.…
And down in the new control group method object…we can set validators on the controls.…Let's add a pattern validator for the name.…We will use a regular expression that only allows strings…that are alphanumeric, which is letters and numbers,…with support for dashes, spaces and forward slashes.…So anything entered for a media item name…that does not adhere to that, we want to mark as invalid.…We'll grab that from the sample.txt file…over in the file tree.…And copy the regex pattern.…
Then head back to the component class file.…The second parameter option on a new control is a validator.…
- What is Angular?
- Setting up an Angular template
- Creating a component
- Displaying data
- Working with events
- Using two-way data binding
- Creating a subcomponent
- Using the built-in HTTP module
- Using the built-in router module
Skill Level Intermediate
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Next steps1m 20s
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