SCRIPT NOT ABLE TO INJECT CODE INTO SPECIFIC HTML ELEMENT

I am writing a simple react based program. but html file showing no text of script attached with it .
On inspecting css says Display:none for script.

script {
    display: none;
}

I am not able to understand the reason. any help will we appreciated.

[html file and script file]
[1]: https://i.stack.imgur.com/daYMs.png