Working with regular expressions I’m also going to cover how to work with regular expressions in JavaScript, though the concepts learned here apply to other languages as well.

I'm trying to write a regular expression for a javascript function. I basically want to test the entire string to make sure the string only has alpha numberic characters and certain latin ...

Notice that JSX can use expressions, but not full JavaScript. It will output the result of the expression to the view in the place it is found in the template.