js template的用法

const name = "Alice";
const age = 30;
const greeting = `Hello, my name is ${name} and I am ${age} years old.`;
console.log(greeting); // 输出: Hello, my name is Alice and I am 30 years old.

const multiLineString = `
This is a multi-line string.
It can contain line breaks without using \n.
`;
console.log(multiLineString);

const price = 10;
const taxRate = 0.05;
const totalPrice = `Total price including tax: $${price * (1 + taxRate)}`;
console.log(totalPrice); // 输出: Total price including tax: $10.5

// 错误的示例
const undefinedVar = undefined;
const errorString = `This will cause an error: ${undefinedVar.nonExistentProperty}`;

// 正确的示例
const correctString = `This is correct: ${undefinedVar || 'default value'}`;

const stringWithQuotes = `He said, "Hello!"`;
console.log(stringWithQuotes); // 输出: He said, "Hello!"