How to make a field required?

Question

Angular

Hello!
There is a mold and one input.
How can I make this input required and make the button unavailable until the required fields are filled in?
jsfiddle.net/uptnx/386

Answer 1

Let's you read the documentation anyway...
https://docs.angularjs.org/api/ng/directive/input
https://docs.angularjs.org/api/ng/directive/form

Answer 2

In addition to Sergei Protko's answer :
https://docs.angularjs.org/api/ng/directive/ngDisabled
example (2 required fields, 1 not) jsfiddle :

<form name="myForm" ng-submit="yourSubmitFun()">
    <input type="text" ng-model="yourModel1" required />
    <input type="text" ng-model="yourModel2" required />
    <input type="text" ng-model="yourModel3" />
    <button type="submit" ng-disabled="myForm.$invalid"> Submit form </button>
</form>