Object instantiation is occurring without any issues:
let paginationDetails: Common.Models.PaginationModel = {
PageNumber: this.pageNumber,
PageSize: this.pageSize,
SearchText: this.denominationFilter,
Ascending: true
};
However, when attempting to instantiate the object in this manner:
let pagDetails = new Common.Models.PaginationModel(
this.pageNumber,
this.pageSize,
true,
this.denominationFilter);
An error is being encountered:
Exploring the concept of an interface and its implementation can be intriguing. The code snippet at TS playground provides a clear example of this.
namespace Common.Models
{
export interface IPaginationModel {
PageNumber: number;
PageSize: number;
SearchText: string;
Ascending: boolean;
}
export class PaginationModel implements IPaginationModel {
constructor(
public PageNumber: number,
public PageSize: number,
public SearchText: string,
public Ascending: boolean
){}
}
}
Utilizing the interface, we can ensure that the types align as they should. By constructing objects that adhere to the structure of IPaginationModel, we create instances with the desired properties.
// Using an Interface for type validation
let paginationParams: Common.Models.IPaginationModel = {
PageNumber: this.pageNumber,
PageSize: this.pageSize,
SearchText: this.denominationFilter,
Ascending: true
};
// Alternatively, using a class constructor
let pagParams = new Common.Models.PaginationModel(
this.pageNumber,
this.pageSize,
this.denominationFilter,
true);
// This showcases how a class can serve as an interface (similar to the first example)
let paginationParamsAsClassAPI: Common.Models.PaginationModel = {
PageNumber: this.pageNumber,
PageSize: this.pageSize,
SearchText: this.denominationFilter,
Ascending: true
};
In conclusion, interfaces and classes play pivotal roles in defining types when creating JavaScript objects. To delve deeper into this topic, refer to the detailed breakdown provided here.
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