How to create new line in Plot.ly JS title

Use <br> to break lines in plotly strings.

To have more control, I'm doing like this for multiple-lines title:

multipleStringLines: (title) => {
    if (title.length > 20) { // check if greater than threshold!
                let y_axis = title.split(' ');    //break into words
                let interval = title.split(' ').length / 2;     //2-lines
                return y_axis.slice(0, interval).join(' ') + '<br>' + y_axis.slice(interval, y_axis.length).join(' ');
    }
     return title;
}