js实现planobj

以下是使用JavaScript实现PlanObj（计划对象）的几种常见方法，根据需求可选择不同实现方式：

基础对象结构

定义一个包含任务名称、截止日期、优先级等属性的对象：

const planObj = {
  taskName: "完成项目报告",
  deadline: "2023-12-31",
  priority: "high",
  isCompleted: false
};

类实现（ES6）

通过类封装计划对象的属性和方法：

class PlanObj {
  constructor(taskName, deadline, priority) {
    this.taskName = taskName;
    this.deadline = new Date(deadline);
    this.priority = priority;
    this.isCompleted = false;
  }

  completeTask() {
    this.isCompleted = true;
  }

  daysRemaining() {
    return Math.ceil((this.deadline - Date.now()) / (1000 * 60 * 60 * 24));
  }
}

工厂函数模式

使用工厂函数创建可复用的计划对象：

function createPlan(taskName, deadline, priority = 'medium') {
  return {
    taskName,
    deadline: new Date(deadline),
    priority,
    isCompleted: false,
    toggleComplete() {
      this.isCompleted = !this.isCompleted;
    }
  };
}

带验证的增强版

添加属性验证逻辑：

class ValidatedPlan {
  constructor(taskName, deadline) {
    if (!taskName) throw new Error("Task name required");
    if (!Date.parse(deadline)) throw new Error("Invalid date");

    this._taskName = taskName;
    this._deadline = new Date(deadline);
    this._priority = 'medium';
  }

  set priority(level) {
    const validLevels = ['low', 'medium', 'high'];
    if (!validLevels.includes(level)) {
      throw new Error(`Priority must be one of: ${validLevels.join(', ')}`);
    }
    this._priority = level;
  }
}

使用示例

const myPlan = new PlanObj("学习JavaScript", "2023-12-15", "high");
console.log(myPlan.daysRemaining());
myPlan.completeTask();

根据具体需求可选择简单对象、类继承、工厂模式等不同实现方式，复杂场景可结合TypeScript进行类型约束。