JSFiddle - React, Tailwind, and code Playground

JavaScript

try {
    a();
} catch(e) {
    alert('problem calling function a(): ' + e);
};
try {
    b();
} catch(e) {
    alert('problem calling function b(): ' + e);
};

function a(){
    alert('function a() called!');
};
    
var b = function(){
    alert('function b() called');
};