ES6中模板字符串用法介绍（附示例）

`string text`

`string text line 1
 string text line 2`

`string text ${expression} string text`

tag `string text ${expression} string text`

let single=`string text, '' ""\`` // "string text, '' ""`"

let multip=`string text line 1
 string text line 2`
 // "string text line 1
 //  string text line 2"

所以我们可以这么写代码
"
let dom=`
    我要换行
    我还要换行
`
"
虽然好像没什么卵用

let name='jack',age=23
let summary=`my name is ${name}, age is ${age}`
console.log(summary) // "my name is jack, age is 23"

let name='jack',age=23
let summary='my name is ' + name + ', age is ' + age
console.log(summary) // "my name is jack, age is 23"

let num1 = 1, num2 = 2
`${num1} + ${num2} = ${num1 + num2}` // '1 + 2 = 3'

let inner=`${`${'1'}`}` // 1

function myTag(strings, personExp, ageExp) {
  var str0 = strings[0]; // "that "
  var str1 = strings[1]; // " is a "
  var str2 = strings[2]; // " "
  var ageStr;
  if (ageExp > 99){
    ageStr = 'centenarian';
  } else {
    ageStr = 'youngster';
  }
  return str0 + personExp + str1 + ageStr;
}
var output = myTag`that ${ 'Mike' } is a ${ '22' }`;
console.log(output);// that Mike is a youngster

function tag(strings) {
  console.log(strings.raw[0]);
}
tag`string text line 1 \n string text line 2`; // "string text line 1 \n string text line 2"

var str = String.raw`Hi\n${2+3}!`;
// "Hi\n5!"
str.length;
// 6
str.split('').join(',');
// "H,i,\,n,5,!"

let name="jack",age=23
let summary=`my name is ${name}, age is ${age}`

var name = "jack",
    age = 23;
var summary = "my name is " + name + ", age is " + age;