how do I put a value in a form using java script. It is a form on the TradinView platform. The input box is identified by a class.
For some reason document.getElementsByClassName() does not work.
function myFunction() {
document.getElementsByClassName("input-uGWFLwEy with-end-slot-uGWFLwEy")[0].value = "3";}
The value is displayed in the input box, but the form does not save this input. Any ideas?
link to the page with the form:
