'rows' and 'lang' attribute of dcc.Textarea

Hi!

I am trying to set a dash-core-components.Textarea. I would like to fix its height to only one row and define the language used in the element as French.
I tried to change the ‘rows’ and ‘lang’ properties, but I did not find any example of their use. In the documentation, they are both strings. So I tried the following values but none of them worked :

  • rows: 1, ‘one’, ‘1’
  • lang: ‘french’, ‘fr’

A code so you can test easily:

import dash
import dash_core_components as dcc
import dash_html_components as html

external_stylesheets = ['https://codepen.io/chriddyp/pen/bWLwgP.css']
app = dash.Dash(__name__, external_stylesheets=external_stylesheets)

app.layout = html.Div([
    dcc.Textarea(
        id="textarea",
        placeholder='Recherche...',
        value='Texte en français : baguette et camembert',
        rows='1',
        title='This is a tooltip',
        style={'width': '100%'},
        lang='fr'
    ),
])

if __name__=='__main__':
    app.run_server()