如何消除在javascript代码中使用多个if else条件？

switch (expression) {
  case value1:
    // code block for value1
    break;
  case value2:
    // code block for value2
    break;
  ...
  default:
    // code block for other cases
    break;
}

const handlers = {
  value1: () => {
    // code block for value1
  },
  value2: () => {
    // code block for value2
  },
  ...
};

// 使用时调用对应的处理函数
handlers[expression]();

class BaseHandler {
  handle() {
    // default behavior
  }
}

class Value1Handler extends BaseHandler {
  handle() {
    // code block for value1
  }
}

class Value2Handler extends BaseHandler {
  handle() {
    // code block for value2
  }
}

// 使用时根据不同的情况创建对应的处理类，并调用处理方法
const handler = createHandler(expression);
handler.handle();

function createHandler(expression) {
  switch (expression) {
    case value1:
      return new Value1Handler();
    case value2:
      return new Value2Handler();
    ...
    default:
      return new BaseHandler();
  }
}