Add property to object only if it is not undefined

I have the following object:

let params = {
limit: limit,
offset: 15,
status: "completed",
product_id: this.route.snapshot.queryParams.product_id,
};


The above object contain parameters that filter my data source.

this.route.snapshot.queryParams.product_id is a query/get parameter

?product_id=123
​

However if this value is not present it's undefined. So I do not want to add product_id member to the parameters object if this value is undefined.

If it is undefined the object should look like:


let params = {
limit: limit,
offset: 15,
status: "completed",
};

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