How to add <script> tag using ReactJS?

Question

I need to declare a javascript function as described below:

render: function() {
  return (
          <div>
            <SomeReactClass somefunction="myFunction">
            <script>
              function myFunction(index, row) {
                return index;                       <<<< error in this line 
              }
            </script>
          </div>
          );
}

But, it does not compile: "Parse Error: Line 113: Unexpected token return"

How can I add tag using ReactJS?

---

UPDATE

I'm trying to use bootstrap-table detail view. The function is passed as parameter to the grid and it is used to render the row's detail. Also, see the example's source code for a better understanding.

When I try the way you're saying, it compiles, but does not work at all:

This is how it looks like (in example above):

This is what I'm getting with <SomeReactClass somefunction={myFunction}>

Answer 1

I know this is old, but i stumbled upon this recently and here is the best solution i found (i'm using it for browser polyfills, but it works for any code):

render: function() {
  return (
     <div>
        <SomeReactClass somefunction="myFunction">
        <script
          dangerouslySetInnerHTML={{ __html:
            `function myFunction(index, row) {return index;}`
          }}
        />
     </div>
  );
}