模板字符串功能

1. //ES6  字符串插值
   var customer = { name: "Foo" }
   var card = { amount: 7, product: "Bar", unitprice: 42 }
   var message = `Hello ${customer.name},
   want to buy ${card.amount} ${card.product} for
   a total of ${card.amount * card.unitprice} bucks?`
   
   //ES5
   var customer = { name: "Foo" };
   var card = { amount: 7, product: "Bar", unitprice: 42 };
   var message = "Hello " + customer.name + ",\n" +
   "want to buy " + card.amount + " " + card.product + " for\n" +
   "a total of " + (card.amount * card.unitprice) + " bucks?";
   

   　　链接：http://es6-features.org/#StringInterpolation

2. //ES6    自定义插值 
   get`http://example.com/foo?bar=${bar + baz}&quux=${quux}`
   
   //ES5 
   get([ "http://example.com/foo?bar=", "&quux=", "" ],bar + baz, quux);
   

   　　

3. //ES6    原始字符串访问     访问原始模板字符串内容（反斜杠不被解释）。 
   function quux (strings, ...values) {
       strings[0] === "foo\n"
       strings[1] === "bar"
       strings.raw[0] === "foo\\n"
       strings.raw[1] === "bar"
       values[0] === 42
   }
   quux`foo\n${ 42 }bar`
   
   String.raw`foo\n${ 42 }bar` === "foo\\n42bar"
   
   //ES5
   ES5中没有等值 
   

   语法：

4. 语法：
   String.raw`templateStr`;
   String.raw(obj, ...substitutions);
   

   参数：
   
   templateStr
   必需。模板字符串。
   obj
   必需。一个使用对象文本表示法指定的格式正确的对象，例如 { raw: “value” }。
   ...substitutions
   可选。一个数组（rest 参数），包含一个或多个替换值。
   

   　　

   function log(arg) {
       if(console && console.log) {
           console.log(arg);
       }
   };
   
   var name = "bob";
   
   log(`hello \t${name}`);
   log(String.raw`hello \t${name}`);
   // The following usage for String.raw is supported but
   // is not typical.
   log(String.raw({ raw: 'fred'}, 'F', 'R', 'E'));
   
   // Output:
   // hello   bob
   // hello \tbob
   // fFrReEd              ？？？？？？？
   

   
   String.raw 函数旨在与模板字符串一起使用。原始字符串将包含存在于字符串中的任何转义字符和反斜杠。

5. 链接：http://es6-features.org/#RawStringAccess