Angular’s two-way data binding is a feature that allows data to be synchronized between a component’s template and its TypeScript code. With two-way data binding, changes made to a value in the template are automatically propagated to the corresponding property in the component’s TypeScript code, and vice versa.
To implement two-way data binding in Angular, you use a combination of property binding and event binding. You bind the value of an input element in the template to a property in the component’s TypeScript code using property binding, and you bind the change event of the input element to a method in the component’s TypeScript code using event binding.
Here is an example of how two-way data binding works in Angular:
<input [(ngModel)]="name">In this example, the ngModel directive is used for two-way data binding. The value of the input element is bound to the name property of the component’s TypeScript code using square brackets for property binding. The parentheses around ngModel indicate that the change event of the input element is bound to the name property using round brackets for event binding.
When the user types a new value into the input element, the change event is triggered and the name property is updated with the new value. At the same time, because of the two-way data binding, the new value is immediately reflected in the input element as well.