In JavaScript, ${}for template literals. Template literals are a method that allow you to insert variables, expressions, function calls, etc. into a string by wrapping them in ${} to make them part of the string. For example:
const name = "Alice";
const greeting = `Hello, ${
name}!`;
console.log(greeting); // 输出：Hello, Alice!
In the above example, ${name} inserts the value of the variable name into the string. This is more convenient than using the string concatenation (+), especially when multiple variables or expressions need to be inserted.