Var hello = "foo";

var my_string ="I pity the";

console.log (my_string,你好)

创建一个类似于Java的String.format()的方法

StringJoin=(s, r=[])=>{
  r.map((v,i)=>{
    s = s.replace('%'+(i+1),v)
  })
return s
}

use

console.log(StringJoin('I can %1 a %2',['create','method'])) //output: 'I can create a method'

在Firefox 34 / Chrome 41 / Safari 9 / Microsoft Edge之前，不，这在javascript中是不可能的。你将不得不求助于:

var hello = "foo";
var my_string = "I pity the " + hello;

你可以这么做，但它不是一般的

'I pity the $fool'.replace('$fool', 'fool')

如果确实需要，您可以轻松地编写一个函数来智能地执行此操作

完整且随时可用的回答<ES6:

 var Strings = {
        create : (function() {
                var regexp = /{([^{]+)}/g;

                return function(str, o) {
                     return str.replace(regexp, function(ignore, key){
                           return (key = o[key]) == null ? '' : key;
                     });
                }
        })()
};

电话是

Strings.create("My firstname is {first}, my last name is {last}", {first:'Neo', last:'Andersson'});

将它附加到String.prototype:

String.prototype.create = function(o) {
           return Strings.create(this, o);
}

然后使用as:

"My firstname is ${first}".create({first:'Neo'});

如果你在>ES6上，那么你也可以这样做:

let first = 'Neo'; 
`My firstname is ${first}`; 

String.prototype.interpole = function () {
    var c=0, txt=this;
    while (txt.search(/{var}/g) > 0){
        txt = txt.replace(/{var}/, arguments[c]);
        c++;
    }
    return txt;
}

Uso:

var hello = "foo";
var my_string = "I pity the {var}".interpole(hello);
//resultado "I pity the foo"