Javascript字符串内插的使用方式

Question

I came across this example of a developer where he used string interpolation.

The way he used it was as follow :

console.log(`Hello, $userName`); 

I didn't see anything wrong with that until later in his example. He did string interpolation again but differently this time. This time he used brackets. like this:

console.log(`The user asked ${question}`); 

What's the difference ? Does it matter which way I use? or is it simply a mistake from the developer.

Answer 1

Easiest way is to try

As you can see the first does not do anything

 var $userName = "Mike", userName = "Michael", question = "What's up?" console.log(`Hello, $userName`); // not a valid JS string interpolation console.log(`The user asked ${question}`); // This one works // Perhaps he meant console.log(`Hello`, $userName); // or more likely console.log(`Hello, ${userName}`);