ES6模板字符串`的引用

$('#result').append(
  'There are <b>' + basket.count + '</b> ' +
  'items in your basket, ' +
  '<em>' + basket.onSale +
  '</em> are on sale!'
);

$('#result').append(` There are <b>${ 
    basket.count}</b> items in your basket, <em>${ 
    basket.onSale}</em> are on sale! `);

// 普通字符串
`In JavaScript '\n' is a line-feed.`

// 多行字符串
`In JavaScript this is not legal.`

console.log(`string text line 1 string text line 2`);

// 字符串中嵌入变量
let name = "Bob", time = "today";
`Hello ${ 
    name}, how are you ${ 
    time}?`

let greeting = `\`Yo\` World!`;

$('#list').html(` <ul> <li>first</li> <li>second</li> </ul> `);

$('#list').html(` <ul> <li>first</li> <li>second</li> </ul> `.trim());

function authorize(user, action) { 
   
  if (!user.hasPrivilege(action)) { 
   
    throw new Error(
      // 传统写法为
      // 'User '
      // + user.name
      // + ' is not authorized to do '
      // + action
      // + '.'
      `User ${ 
    user.name} is not authorized to do ${ 
    action}.`);
  }
}

let x = 1;
let y = 2;

`${ 
    x} + ${ 
    y} = ${ 
    x + y}`
// "1 + 2 = 3"

`${ 
    x} + ${ 
    y * 2} = ${ 
    x + y * 2}`
// "1 + 4 = 5"

let obj = { 
   x: 1, y: 2};
`${ 
    obj.x + obj.y}`
// "3"

function fn() { 
   
  return "Hello World";
}

`foo ${ 
    fn()} bar`
// foo Hello World bar

// 变量place没有声明
let msg = `Hello, ${ 
    place}`;
// 报错

`Hello ${ 
    'World'}`
// "Hello World"

const tmpl = addrs => ` <table> ${ 
    addrs.map(addr => `
    <tr><td>${addr.first}</td></tr>
    <tr><td>${addr.last}</td></tr>
  `).join('')} </table> `;

const data = [
    { 
    first: '<Jane>', last: 'Bond' },
    { 
    first: 'Lars', last: '<Croft>' },
];

console.log(tmpl(data));
// <table>
//
//   <tr><td><Jane></td></tr>
//   <tr><td>Bond</td></tr>
//
//   <tr><td>Lars</td></tr>
//   <tr><td><Croft></td></tr>
//
// </table>

let func = (name) => `Hello ${ 
    name}!`;
func('Jack') // "Hello Jack!"