You might be able to use some custom CSS to do this maybe try the following replacing textInput1 with the id of your text input?
#retool-widget-textInput1 input{
text-transform: uppercase;
}
That won't capitalize the actual value meaning you would still need to transform it in any references:
But for that, _.upperCase
might be helpful:
Similarly, text-transform: capitalize;
and _.startCase
will capitalize the first letter of each word.