I'm puzzled by the variable declaration within an Angular component and I'd like to understand why we declare it in the following way:
export class AppComponent {
serverElements = [];
newServerName = '';
newServerContent = '';
}
and why aren't we using type declarations here in TypeScript.
Ever wondered why we declare properties in this specific way?
These declarations are for initializing properties. These properties will be available on class instances and will be public by default, similar to if they were declared with the keyword public.
Have you noticed the absence of type declarations in TypeScript here?
TypeScript automatically infers types from initialization values (more details can be found in the documentation). If a value is initialized during declaration, specifying the type explicitly is often unnecessary.
However, it's important to provide a type for serverElements to prevent it from defaulting to never[]. For example, if it should be an array of ServerElement instances:
export class AppComponent {
serverElements: ServerElement[] = [];
newServerName = '';
newServerContent = '';
}
newServerName and newServerContent are correctly inferred as strings.
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