jsStringFormat()和带有JSON的撇号

function jsStringFormat() {
  var args = arguments;
  return this.replace(/{(\d+)}/g, function(match, number) {
    return typeof args[parseInt(number) + 1] != 'undefined'
      ? args[parseInt(number) + 1]
      : match;
  });
}

var str = 'Hello, {0}!';
console.log(str.jsStringFormat('John')); // 输出：Hello, John!

var str1 = 'He said, "Hello, world!"';
var str2 = "It's a beautiful day.";
var str3 = 'It\'s a beautiful day.';

console.log(str1); // 输出：He said, "Hello, world!"
console.log(str2); // 输出：It's a beautiful day.
console.log(str3); // 输出：It's a beautiful day.

{
  "name": "John",
  "age": 30,
  "city": "New York"
}

{
  'name': 'John',
  'age': 30,
  'city': 'New York'
}