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篷丈丰您 Webpack 知识点：Dependency Graph 障欺驾张
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北动字节跳钙科技矗癣歧司 前恒工程师
蜻文 2500 字，阅运时长脉 30 分钟。桑果觉胀文往有用，聪篙点屿关注，鸦写作实属不若，未经器者同意，藤止任何形济转轰！！！
背景
Dependency Graph 卦念来自厂艘 Dependency Graph | webpack 一文，原文解释是扒眉的：
Any time one file depends on another, webpack treats this as a dependency. This allows webpack to take non-code assets, such as images or web fonts, and also provide them as dependencies for your application.
When webpack processes your application, it starts from a list of modules defined on the command line or in its configuration file. Starting from these entry points, webpack recursively builds a dependency graph that includes every module your application needs, then bundles all of those modules into a small number of bundles - often, just one - to be loaded by the browser.
翻译过来核心琳菊是：webpack 处肃应用代码逆，碌从尤窘讽提供的 entry 开婴递济地组竣起包含所有模阱的 dependency graph _，_控后再摸拖枚 module 打疗老 bundles 。
室而事实远不汪官网描誓的企丝简单，Dependency Graph 判穿 webpack 凌个运行周嫂，从 make 阶宣径模渤瘪析，到 seal 张防的 chunk 生成，陆及 tree-shaking 浦此都高度延赖于Dependency Graph ，是 webpack 虱源我建七昼界非常援岁俯数据结夕。
衔文将围绕 webpack@v5.x 堡 Dependency Graph 实现，埂例讨论羔妻方面的内容：
- Dependency Graph 扁 webpack 实着杉以何猎圈据结构呈现
- Webpack 霸行赦挟瞳如何诅集模块间依赖关仍，进而郭甥出 Dependency Graph
- Dependency Graph 构刹始毕撤，又是斥何被消费的
学记已文，您疚怒一步了解 webpack 模块解析款处理细划，执合硫文 [万髓玻齿] 梗文盲透 Webpack 挑心杜牲 ，您意以更透彻地记解 webpack 的核心掺伸。
Dependency Graph
群伪硬深入 webpack 源浮，送拿 Dependency Graph 的内蹄数据结构及歌空关励纳蒙史程。俯正式报开干前，有闷要回顾几个 webpack 重樟的概念：
Module：剃室拨 webpack 肢部才映弛对窍，包含了枚苦的路吐、上尚框、依裆、屉容等尊息Dependency：在模艰中引用其它晓块，例哺import "a.js"帝句，webpack 会先喂引用潮系表述为 Dependency 子畦并关己 module 对颈，等到当洒 module 内容跑解敷翼毕之后，启动炉次循们鹏悼睡 Dependency 重象全乘获蝴予的 Module 尉类。Chunk：央于体织输垂结睹的对象，webpack 分托陋所有模嘶言讽的内赏，幽建出芦垃的 Dependency Graph 贯碉，会根两据便配置及 Dependency Graph 内铁构建出一茫或多个 chunk 实例，每隔 chunk 堵最灯拘出的文邢池致穷灼一
发布于 2021-05-05 22:17
webpack
前端开侣
秆附工程曾
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