Using initializer in typescript

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hi i have class

C#

export class Options {

    //main properties

    valueField: any;
    labelField:any;
    sortField: string[];
    searchFields: string[];
    items: any[];
    currentResults: any[];
    delimiter: string;
    mode: SelectizeMode;
    selected: any;
    placholder: string;

    get hasOptions(): Boolean {
        return this.items ?  this.items.length > 0 : false;
    }


    constructor(_valueField?: string, _labelField?: string,
        _searchFields?: string[], _items?: any[], _currentResults?: any[],
        _selecetd?: any, _delimiter?: string, _sortField?: string[], _mode?: SelectizeMode, _placholder?: string) {


        this.valueField = _valueField;
        this.labelField = _labelField;
        this.sortField = _sortField || [this.valueField];
        this.searchFields = _searchFields || [this.labelField, this.valueField];
        this.items = _items;
        this.delimiter = _delimiter || ',';
        this.mode = _mode || SelectizeMode.single;
        this.selected = _selecetd;
        this.currentResults = _currentResults || [];
        this.placholder = _placholder || 'select...';
    }
}

i want to instate object of that class without having to pass all optional paramters

like c#

for example i want to like that

JavaScript

Options x =     Options(){
delimiter:','
}

What I have tried:

i made all constructor parameters as optional

create Interface instead of class it worked but produce another problem that i need new Instances so i had to make it class as can not take instance of interface

Posted 9-Aug-16 5:13am

TheSniper105

Updated 9-Aug-16 6:15am

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Pascal Ganaye · Accepted Answer · 2016-08-09T06:15:00

There is no easy way to do exactly what you want.
There is an alternative though which might fit your need.

Rather than creating a class you create an interface with all members optional.

JavaScript

export interface IOptions { 
 	valueField?: string; 
	labelField?: string;
	searchFields?: string[];
	...
}

Then the instantiation can be done from a simple object literal.

JavaScript

var options : IOptions =  {
	valueField: "aa",
	labelField: "bb"
};

It also works in methods:

JavaScript

var x = new class1({ valueField:"AA"});

class class1 {
 	valueField: string; 
	labelField: string;
  
	constructor(options: IOptions){
		this.valueField = options.valueField || "empty";	  
		this.labelField = options.labelField || "empty";	  
	}
}