JAVASCRIPT

check if a string is empty java

if (myString == null || myString.equals(""))
			throw new IllegalArgumentException("empty string");

check if string is empty

let str1 = "Hello world!";
let str2 = "";
let str3 = 4;
console.log(str1.length === 0)
console.log(str2.length === 0)
console.log(str3.length === 0)

false
true
false