creating an error message if browser does not support ES6 Template Literals

Question

I have been using string literals in my javascript. I would like an error message to be shown if string literals are not supported. caniuse

My Idea was that i would

Answer 1

Yes. This is one of the legitimate uses of eval:

var supportsTemplateLiterals = false;
try {
    eval("`foo`");
    supportsTemplateLiterals = true;
}
catch (e) {
}
console.log("Supports template literals? " + supportsTemplateLiterals);

It works because the main code parses on a pre-ES2015 JavaScript engine, but the code in the eval doesn't; parsing chokes on the template literal.

On Chrome, Firefox, Edge, etc, that shows

Supports template literals? true

On IE (any version), it shows:

Supports template literals? false