如何从一个大字符串中获取数据并将其放入对象字段？

var str = "name=John,age=25,city=New York";
var obj = {};

str.split(',').forEach(function(item) {
  var pair = item.split('=');
  obj[pair[0]] = pair[1];
});

console.log(obj);

{
  name: "John",
  age: "25",
  city: "New York"
}

var str = "Name: John, Age: 25, City: New York";
var obj = {};

var regex = /(\w+):\s(\w+)/g;
var match;

while ((match = regex.exec(str)) !== null) {
  obj[match[1]] = match[2];
}

console.log(obj);

{
  Name: "John",
  Age: "25",
  City: "New York"
}

var str = '{"name":"John","age":25,"city":"New York"}';
var obj = JSON.parse(str);

console.log(obj);

{
  name: "John",
  age: 25,
  city: "New York"
}