var Str = "_Hello_";
var newStr = Str.replaceAll("_", "<em>");
console.log(newStr);it out puts <em>Hello<em>
I would like it to output <em>Hello</em>
but I have no idea how to get the </em> on the outer "_", if anyone could help I would really appreciate it. New to coding and finding this particularly difficult.
Replace two underscores in one go, using a regular expression for the first argument passed to replaceAll:
var Str = "_Hello_";
var newStr = Str.replaceAll(/_([^_]+)_/g, "<em>$1</em>");
console.log(newStr);NB: it is more common practice to reserve PascalCase for class/constructor names, and use camelCase for other variables. So better str =, ...etc.
I would phrase this as a regex replacement using a capture group:
var str = "_Hello_ World!";
var newStr = str.replace(/_(.*?)_/g, "<em>$1</em>");
console.log(newStr);