Javascript 中的轻量级规则引擎 [关闭]

使用JavaScript编写的轻量级规则引擎是一种强大的工具，它可以帮助开发人员快速而灵活地处理复杂的业务逻辑。规则引擎可以将业务规则抽象成规则集，然后根据事实和条件来匹配规则并执行相应的操作。本文将介绍如何使用JavaScript中的轻量级规则引擎，并提供一个案例代码来帮助读者更好地理解其应用。

javascript
var PromotionRules = [
  {
    name: "9折优惠",
    condition: function(facts) {
      return facts.totalAmount > 100;
    },
    action: function(facts) {
      facts.discount = facts.totalAmount * 0.9;
    }
  },
  {
    name: "8折优惠",
    condition: function(facts) {
      return facts.totalAmount > 200;
    },
    action: function(facts) {
      facts.discount = facts.totalAmount * 0.8;
    }
  },
  {
    name: "特定商品5折优惠",
    condition: function(facts) {
      return facts.items.includes("特定商品");
    },
    action: function(facts) {
      facts.discount = facts.totalAmount * 0.5;
    }
  }
];

javascript
var facts = {
  totalAmount: 250,
  items: ["商品A", "商品B"]
};
PromotionRules.forEach(function(rule) {
  if (rule.condition(facts)) {
    rule.action(facts);
  }
});
console.log("应付金额：" + facts.discount);