在 javascript 中使用 ${ var } 打印变量

Question

The above is a screenshot a tutorial in which the tutor used ${ var } to print a variable in js.

But when i ran the same code, i got like this:

What is the actual problem?

Answer 1

You're using the wrong quote type. To do what you want you'll need to use backtick. It's the one to the left of the 1 key on most keyboards.

Answer 2

console.log( Server at port ${port} ) // Don't put "" or ''. Use ``

Answer 3

you must use the backtick [ ` ] ; instead of the using [ ' ],So you can solve it.