Hi Vednarayan,

One of the possible solution is to register the input widget keypress event handler with the following definition to restrict lowercase characters.

JS Snippet: InputJSTask

document.getElementById($parameters.InputWidget_Id).addEventListener('keypress', function(event){
    // Get the character code of the key that was pressed
    let charCode = event.charCode;

    // Check if the character is a lowercase letter
    if (charCode >= 97 && charCode <= 122) {
        event.preventDefault();
    }
});

(source: Google search)

I hope this helps!

Kind regards,

Benjith Sam

if (event.key >= 'a' && event.key <= 'z') {  

              event.preventDefault();             

   let uppercaseKey = event.key.toUpperCase();             

   inputField.value += uppercaseKey;        

    } 

The keypress event listener prevents lowercase characters from being typed and replaces them with their uppercase counterparts immediately. 

Hi Vednarayan, 

   Try to use this regex code in JS.

document.addEventListener('DOMContentLoaded', function() {

    var inputField = document.getElementById($parameters.InputField);

    inputField.addEventListener('input', function(event) {

        var value = inputField.value;

        var newValue = value.replace(/[a-z]/g, ''); // Remove lowercase letters

        if (newValue !== value) {

            inputField.value = newValue;

        }

    });

});

Thanks,

Gokulprasanth M

Hey @Vednarayan 

*If you want to convert whatever user entered into upper case then use buildin function 

ToUpper("First string") = "FIRST STRING"

*If want to prevent entering lower case character in input then try solution suggested by @Benjith Sam 

Hi @Vednarayan, you try my component Restrict Characters, here is the demo.

Thanks
Gitansh Anand

Hi  Vednarayan

Write this script within the 'onready' function of the screen. 

Refer to this link for the demo  DemoLink

document.getElementById($parameters.Inputboxid).addEventListener("keydown", function(event) {  if (event.key === event.key.toLowerCase()) {    event.preventDefault();  }});

Thanks,

Jothikarthika