Populating an unbound repeater with a button click

[Xavier_Le_Boulenge]

Hi everyone,

I am making an invoice generator using Editor X. I am facing 2 challenges and seeking for help.

So here’s how it goes, I have created a series of fields to collect data and store in with code in a dataset (I haven’t connected it with the in-built CMS system, I feel like I have better control over it).
Now reaching the area where the user can insert an actual job/quantity/hours/tax rates.
I have set it up using an unbound repeater with only one item in it.
This item shows 4 fields: object, quantity, price, tax rate (this one is actually a dropdown).
I have set up a + button right under this section, to allow the user to insert a new line into the invoice document. Problem is, I can’t figure out how to do that. Here’s what I tried to do.

export function buttonAddLine_click(event) {
	const repeater = $w('#repeater1');
	const firstRow = repeater.data[0];
	const newRow = {...firstRow};

	repeater.data = repeater.data.concat(newRow);
}

Clicking the button does absolutely nothing xD