JSFiddle - React, Tailwind, and code Playground

HTML

<span class="grade"> + * *<span>

JavaScript

function changeNumber()
{
    $(".grade").each(function(){
        var $self = $(this);
        
        $self.text($self.text().replace('*','1'))
        $self.text($self.text().replace('+','2'))
    }); 
}

changeNumber();