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服务端渲染（SSR）相关逻辑，本课程不涉及\n","src/server/render.js",[1535,1697,1698],{"__ignoreMap":1634},[1638,1699,1700],{"class":1640,"line":1641},[1638,1701,1694],{"class":1644},[1628,1703,1706],{"className":1630,"code":1704,"filename":1705,"language":1633,"meta":1634,"style":1634},"// 单文件组件（.vue 文件）的解析逻辑，属于构建工具的辅助代码\n","src/sfc/parser.js",[1535,1707,1708],{"__ignoreMap":1634},[1638,1709,1710],{"class":1640,"line":1641},[1638,1711,1704],{"class":1644},[1628,1713,1716],{"className":1630,"code":1714,"filename":1715,"language":1633,"meta":1634,"style":1634},"// 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入口）",[1732,1780,1781,1786],{},[1747,1782,1783],{},[1535,1784,1785],{},"src/server",[1747,1787,1788],{},"服务端渲染（SSR）相关逻辑，本课程不涉及",[1732,1790,1791,1796],{},[1747,1792,1793],{},[1535,1794,1795],{},"src/sfc",[1747,1797,1798],{},"单文件组件（.vue 文件）的解析逻辑，属于构建工具的辅助代码",[1732,1800,1801,1806],{},[1747,1802,1803],{},[1535,1804,1805],{},"src/shared",[1747,1807,1808],{},"全局共享的工具函数：类型判断、合并选项等",[1531,1810,1811,1812,1814,1815,1818,1819,1822,1823,1826,1827,1830],{},"其中 ",[1535,1813,1751],{}," 是 Vue 的核心逻辑，",[1562,1816,1817],{},"本课程的主战场","：",[1535,1820,1821],{},"observer"," 是响应式系统，",[1535,1824,1825],{},"vdom"," 是虚拟 DOM 与 patch，",[1535,1828,1829],{},"instance"," 是实例的初始化与生命周期。",[1531,1832,1833,1834,1837],{},"一条简单的记忆路线：",[1562,1835,1836],{},"模板 → compiler 编译成 render 函数 → vdom 生成虚拟节点 → patch 更新真实 DOM → 数据变化时 observer 通知 Watcher 重新走一遍","。这条链路就是 Vue 运行时最核心的主线。",[1550,1839],{},[1526,1841,1843],{"id":1842},"调试环境搭建","🛠 调试环境搭建",[1531,1845,1846],{},"光说不练效果有限，我们现在就把环境搭起来。整个过程只需要几分钟，之后每篇文章你都可以在真实的源码里打断点验证。",[1531,1848,1849,1850,1853],{},"本课程在 ",[1562,1851,1852],{},"Node.js v22"," 环境下验证通过。先把源码拉下来并切换到 2.7.16：",[1628,1855,1859],{"className":1856,"code":1857,"language":1858,"meta":1634,"style":1634},"language-bash shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","# 克隆仓库（本地 Node.js 版本：v22）\ngit clone https://github.com/vuejs/vue.git vue2-source\ncd vue2-source\n\n# 切换到 v2.7.16\ngit checkout v2.7.16\n\n# 安装依赖（包版本以仓库 package.json 为准）\nnpm install\n","bash",[1535,1860,1861,1866,1882,1891,1898,1904,1915,1920,1926],{"__ignoreMap":1634},[1638,1862,1863],{"class":1640,"line":1641},[1638,1864,1865],{"class":1644},"# 克隆仓库（本地 Node.js 版本：v22）\n",[1638,1867,1868,1872,1876,1879],{"class":1640,"line":1648},[1638,1869,1871],{"class":1870},"sYGMc","git",[1638,1873,1875],{"class":1874},"sIEYB"," clone",[1638,1877,1878],{"class":1874}," https://github.com/vuejs/vue.git",[1638,1880,1881],{"class":1874}," vue2-source\n",[1638,1883,1885,1889],{"class":1640,"line":1884},3,[1638,1886,1888],{"class":1887},"swgpB","cd",[1638,1890,1881],{"class":1874},[1638,1892,1894],{"class":1640,"line":1893},4,[1638,1895,1897],{"emptyLinePlaceholder":1896},true,"\n",[1638,1899,1901],{"class":1640,"line":1900},5,[1638,1902,1903],{"class":1644},"# 切换到 v2.7.16\n",[1638,1905,1907,1909,1912],{"class":1640,"line":1906},6,[1638,1908,1871],{"class":1870},[1638,1910,1911],{"class":1874}," checkout",[1638,1913,1914],{"class":1874}," v2.7.16\n",[1638,1916,1918],{"class":1640,"line":1917},7,[1638,1919,1897],{"emptyLinePlaceholder":1896},[1638,1921,1923],{"class":1640,"line":1922},8,[1638,1924,1925],{"class":1644},"# 安装依赖（包版本以仓库 package.json 为准）\n",[1638,1927,1929,1932],{"class":1640,"line":1928},9,[1638,1930,1931],{"class":1870},"npm",[1638,1933,1934],{"class":1874}," install\n",[1936,1937,1938],"warning",{},[1531,1939,1940,1941,1944],{},"如果遇到依赖安装报错（老仓库的 peer 依赖声明较严格），可以试试 ",[1535,1942,1943],{},"npm install --legacy-peer-deps","，或者换一个包管理器，不影响后续调试。",[1531,1946,1947],{},"安装完成后，构建一份带 sourcemap 的开发版本：",[1628,1949,1951],{"className":1856,"code":1950,"language":1858,"meta":1634,"style":1634},"# 构建 dist/vue.js（带完整警告和 sourcemap，适合调试）\nnpm run dev\n",[1535,1952,1953,1958],{"__ignoreMap":1634},[1638,1954,1955],{"class":1640,"line":1641},[1638,1956,1957],{"class":1644},"# 构建 dist/vue.js（带完整警告和 sourcemap，适合调试）\n",[1638,1959,1960,1962,1965],{"class":1640,"line":1648},[1638,1961,1931],{"class":1870},[1638,1963,1964],{"class":1874}," run",[1638,1966,1967],{"class":1874}," dev\n",[1531,1969,1970,1971,1974,1975,1978,1979,1818],{},"构建完成后，",[1535,1972,1973],{},"dist/vue.js"," 就是未压缩的开发版。接着在 ",[1535,1976,1977],{},"examples"," 目录下新建一个调试页面，比如 ",[1535,1980,1981],{},"examples/debug/01-hello.html",[1628,1983,1988],{"className":1984,"code":1985,"filename":1986,"language":1987,"meta":1634,"style":1634},"language-html shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","\u003C!DOCTYPE html>\n\u003Chtml lang=\"zh-CN\">\n\u003Chead>\n    \u003Cmeta charset=\"UTF-8\" />\n    \u003Ctitle>Vue2 源码调试\u003C/title>\n\u003C/head>\n\u003Cbody>\n    \u003Cdiv id=\"app\">{{ message }}\u003C/div>\n\n    \u003Cscript src=\"../../dist/vue.js\">\u003C/script>\n    \u003Cscript>\n        const app = new Vue({\n            el: '#app',\n            data() {\n                return {\n                    message: 'hello vue2 source',\n                };\n            },\n        });\n\n        // 两秒后修改数据，方便观察更新流程\n        setTimeout(() => {\n            debugger;\n            app.message = 'data changed';\n        }, 2000);\n    \u003C/script>\n\u003C/body>\n\u003C/html>\n","01-hello.html","html",[1535,1989,1990,2007,2030,2039,2062,2083,2091,2100,2130,2134,2161,2170,2193,2214,2226,2235,2252,2258,2264,2276,2281,2287,2302,2311,2335,2348,2358,2367],{"__ignoreMap":1634},[1638,1991,1992,1996,2000,2004],{"class":1640,"line":1641},[1638,1993,1995],{"class":1994},"s86vT","\u003C!",[1638,1997,1999],{"class":1998},"sd2Uz","DOCTYPE",[1638,2001,2003],{"class":2002},"s50WR"," html",[1638,2005,2006],{"class":1994},">\n",[1638,2008,2009,2012,2014,2017,2020,2023,2026,2028],{"class":1640,"line":1648},[1638,2010,2011],{"class":1994},"\u003C",[1638,2013,1987],{"class":1998},[1638,2015,2016],{"class":2002}," lang",[1638,2018,2019],{"class":1994},"=",[1638,2021,2022],{"class":1994},"\"",[1638,2024,2025],{"class":1874},"zh-CN",[1638,2027,2022],{"class":1994},[1638,2029,2006],{"class":1994},[1638,2031,2032,2034,2037],{"class":1640,"line":1884},[1638,2033,2011],{"class":1994},[1638,2035,2036],{"class":1998},"head",[1638,2038,2006],{"class":1994},[1638,2040,2041,2044,2047,2050,2052,2054,2057,2059],{"class":1640,"line":1893},[1638,2042,2043],{"class":1994},"    \u003C",[1638,2045,2046],{"class":1998},"meta",[1638,2048,2049],{"class":2002}," charset",[1638,2051,2019],{"class":1994},[1638,2053,2022],{"class":1994},[1638,2055,2056],{"class":1874},"UTF-8",[1638,2058,2022],{"class":1994},[1638,2060,2061],{"class":1994}," />\n",[1638,2063,2064,2066,2069,2072,2076,2079,2081],{"class":1640,"line":1900},[1638,2065,2043],{"class":1994},[1638,2067,2068],{"class":1998},"title",[1638,2070,2071],{"class":1994},">",[1638,2073,2075],{"class":2074},"sndM8","Vue2 源码调试",[1638,2077,2078],{"class":1994},"\u003C/",[1638,2080,2068],{"class":1998},[1638,2082,2006],{"class":1994},[1638,2084,2085,2087,2089],{"class":1640,"line":1906},[1638,2086,2078],{"class":1994},[1638,2088,2036],{"class":1998},[1638,2090,2006],{"class":1994},[1638,2092,2093,2095,2098],{"class":1640,"line":1917},[1638,2094,2011],{"class":1994},[1638,2096,2097],{"class":1998},"body",[1638,2099,2006],{"class":1994},[1638,2101,2102,2104,2107,2110,2112,2114,2117,2119,2121,2124,2126,2128],{"class":1640,"line":1922},[1638,2103,2043],{"class":1994},[1638,2105,2106],{"class":1998},"div",[1638,2108,2109],{"class":2002}," id",[1638,2111,2019],{"class":1994},[1638,2113,2022],{"class":1994},[1638,2115,2116],{"class":1874},"app",[1638,2118,2022],{"class":1994},[1638,2120,2071],{"class":1994},[1638,2122,2123],{"class":2074},"{{ message }}",[1638,2125,2078],{"class":1994},[1638,2127,2106],{"class":1998},[1638,2129,2006],{"class":1994},[1638,2131,2132],{"class":1640,"line":1928},[1638,2133,1897],{"emptyLinePlaceholder":1896},[1638,2135,2137,2139,2142,2145,2147,2149,2152,2154,2157,2159],{"class":1640,"line":2136},10,[1638,2138,2043],{"class":1994},[1638,2140,2141],{"class":1998},"script",[1638,2143,2144],{"class":2002}," src",[1638,2146,2019],{"class":1994},[1638,2148,2022],{"class":1994},[1638,2150,2151],{"class":1874},"../../dist/vue.js",[1638,2153,2022],{"class":1994},[1638,2155,2156],{"class":1994},">\u003C/",[1638,2158,2141],{"class":1998},[1638,2160,2006],{"class":1994},[1638,2162,2164,2166,2168],{"class":1640,"line":2163},11,[1638,2165,2043],{"class":1994},[1638,2167,2141],{"class":1998},[1638,2169,2006],{"class":1994},[1638,2171,2173,2176,2179,2181,2184,2187,2190],{"class":1640,"line":2172},12,[1638,2174,2175],{"class":2002},"        const",[1638,2177,2178],{"class":2074}," app ",[1638,2180,2019],{"class":1994},[1638,2182,2183],{"class":1994}," new",[1638,2185,2186],{"class":1887}," Vue",[1638,2188,2189],{"class":2074},"(",[1638,2191,2192],{"class":1994},"{\n",[1638,2194,2196,2199,2202,2205,2208,2211],{"class":1640,"line":2195},13,[1638,2197,2198],{"class":1998},"            el",[1638,2200,2201],{"class":1994},":",[1638,2203,2204],{"class":1994}," '",[1638,2206,2207],{"class":1874},"#app",[1638,2209,2210],{"class":1994},"'",[1638,2212,2213],{"class":1994},",\n",[1638,2215,2217,2220,2223],{"class":1640,"line":2216},14,[1638,2218,2219],{"class":1998},"            data",[1638,2221,2222],{"class":1994},"()",[1638,2224,2225],{"class":1994}," {\n",[1638,2227,2229,2233],{"class":1640,"line":2228},15,[1638,2230,2232],{"class":2231},"s8pZq","                return",[1638,2234,2225],{"class":1994},[1638,2236,2238,2241,2243,2245,2248,2250],{"class":1640,"line":2237},16,[1638,2239,2240],{"class":1998},"                    message",[1638,2242,2201],{"class":1994},[1638,2244,2204],{"class":1994},[1638,2246,2247],{"class":1874},"hello vue2 source",[1638,2249,2210],{"class":1994},[1638,2251,2213],{"class":1994},[1638,2253,2255],{"class":1640,"line":2254},17,[1638,2256,2257],{"class":1994},"                };\n",[1638,2259,2261],{"class":1640,"line":2260},18,[1638,2262,2263],{"class":1994},"            },\n",[1638,2265,2267,2270,2273],{"class":1640,"line":2266},19,[1638,2268,2269],{"class":1994},"        }",[1638,2271,2272],{"class":2074},")",[1638,2274,2275],{"class":1994},";\n",[1638,2277,2279],{"class":1640,"line":2278},20,[1638,2280,1897],{"emptyLinePlaceholder":1896},[1638,2282,2284],{"class":1640,"line":2283},21,[1638,2285,2286],{"class":1644},"        // 两秒后修改数据，方便观察更新流程\n",[1638,2288,2290,2293,2295,2297,2300],{"class":1640,"line":2289},22,[1638,2291,2292],{"class":1887},"        setTimeout",[1638,2294,2189],{"class":2074},[1638,2296,2222],{"class":1994},[1638,2298,2299],{"class":2002}," =>",[1638,2301,2225],{"class":1994},[1638,2303,2305,2309],{"class":1640,"line":2304},23,[1638,2306,2308],{"class":2307},"smPcV","            debugger",[1638,2310,2275],{"class":1994},[1638,2312,2314,2317,2320,2323,2326,2328,2331,2333],{"class":1640,"line":2313},24,[1638,2315,2316],{"class":2074},"            app",[1638,2318,2319],{"class":1994},".",[1638,2321,2322],{"class":2074},"message",[1638,2324,2325],{"class":1994}," =",[1638,2327,2204],{"class":1994},[1638,2329,2330],{"class":1874},"data changed",[1638,2332,2210],{"class":1994},[1638,2334,2275],{"class":1994},[1638,2336,2338,2341,2344,2346],{"class":1640,"line":2337},25,[1638,2339,2340],{"class":1994},"        },",[1638,2342,2343],{"class":2307}," 2000",[1638,2345,2272],{"class":2074},[1638,2347,2275],{"class":1994},[1638,2349,2351,2354,2356],{"class":1640,"line":2350},26,[1638,2352,2353],{"class":1994},"    \u003C/",[1638,2355,2141],{"class":1998},[1638,2357,2006],{"class":1994},[1638,2359,2361,2363,2365],{"class":1640,"line":2360},27,[1638,2362,2078],{"class":1994},[1638,2364,2097],{"class":1998},[1638,2366,2006],{"class":1994},[1638,2368,2370,2372,2374],{"class":1640,"line":2369},28,[1638,2371,2078],{"class":1994},[1638,2373,1987],{"class":1998},[1638,2375,2006],{"class":1994},[1531,2377,2378,2379,2382],{},"用浏览器直接打开这个 HTML 文件，打开开发者工具，页面会在 ",[1535,2380,2381],{},"debugger"," 处停住。然后你就可以：",[2384,2385,2386,2394,2404],"ol",{},[2387,2388,2389,2390,2393],"li",{},"在 Sources 面板中找到 ",[1535,2391,2392],{},"webpack:///src/core/instance/index.js","（sourcemap 会把 dist 映射回源码）。",[2387,2395,2396,2397,1538,2400,2403],{},"在 ",[1535,2398,2399],{},"initState",[1535,2401,2402],{},"observe"," 等函数里打上断点。",[2387,2405,2406],{},"单步执行，观察数据变化和函数调用栈。",[1531,2408,2409,2410,2413],{},"这就是你未来读源码的标准动作：",[1562,2411,2412],{},"找到关键函数 → 打断点 → 单步看数据和调用栈","。",[1590,2415,2416],{},[1531,2417,2418,2421,2422,2425],{},[1535,2419,2420],{},"npm run dev"," 构建的是带 sourcemap 的开发版，适合调试。生产构建（",[1535,2423,2424],{},"npm run build","）会压缩代码、去掉警告，不适合学习源码。",[1550,2427],{},[1526,2429,2431],{"id":2430},"阅读方法建议","💡 阅读方法建议",[1531,2433,2434],{},"最后分享几条实际读源码时比较有用的习惯：",[2384,2436,2437,2457,2470,2476],{},[2387,2438,2439,2442,2443,2445,2446,2449,2450,1538,2453,2456],{},[1562,2440,2441],{},"带着具体问题去读。"," 不要从第一行开始通读。比如\"改了 ",[1535,2444,1537],{}," 里的数据，视图是怎么更新的？\"带着这个问题，你自然会找到 ",[1535,2447,2448],{},"Object.defineProperty"," 的 setter、",[1535,2451,2452],{},"Dep.notify",[1535,2454,2455],{},"Watcher.run"," 这条链路。",[2387,2458,2459,2462,2463,2466,2467,2469],{},[1562,2460,2461],{},"从入口往下追。"," 先找到 ",[1535,2464,2465],{},"new Vue()"," 的入口（",[1535,2468,1632],{},"），再顺着初始化流程一层层深入，比漫无目的地翻文件高效得多。",[2387,2471,2472,2475],{},[1562,2473,2474],{},"配合手写迷你实现验证。"," 读到一个机制后，自己动手写一个几十行的简化版（比如迷你响应式、迷你 Diff），能写对才是真的懂了。本课程多篇都会安排这样的练习。",[2387,2477,2478,2481],{},[1562,2479,2480],{},"不要纠结细节。"," Flow 类型注解、边缘兼容分支可以跳过，关注主干逻辑即可。课程中的源码引用也做了教学简化，去掉了类型注解和非核心分支。",[1550,2483],{},[1526,2485,2487],{"id":2486},"课程路线图","🗺 课程路线图",[1531,2489,2490],{},"本课程共 8 篇，按\"先主干、再深入\"的顺序展开：",[2384,2492,2493,2499,2510,2517,2522,2527,2532,2537],{},[2387,2494,2495,2498],{},[1562,2496,2497],{},"简介与环境搭建","（本篇）：目录地图与调试环境。",[2387,2500,2501,1818,2503,2505,2506,2509],{},[1562,2502,1391],{},[1535,2504,2465],{}," 时到底发生了什么，",[1535,2507,2508],{},"_init"," 的执行顺序。",[2387,2511,2512,1818,2514,2516],{},[1562,2513,1395],{},[1535,2515,2448],{}," 如何拦截读写，数组为什么需要特殊处理。",[2387,2518,2519,2521],{},[1562,2520,1399],{},"：依赖收集和派发更新，数据变化如何通知到视图。",[2387,2523,2524,2526],{},[1562,2525,1403],{},"：批量更新队列、微任务与宏任务。",[2387,2528,2529,2531],{},[1562,2530,1407],{},"：VNode 的结构、patch 的对比更新过程。",[2387,2533,2534,2536],{},[1562,2535,1411],{},"：模板 → AST → render 函数的三段式流程。",[2387,2538,2539,2541],{},[1562,2540,1415],{},"：两种 Watcher 的实现差异与懒计算机制。",[1936,2543,2544],{},[1531,2545,2546,2547,2551,2552,2413],{},"本课程假设你已经熟悉 Vue2 的日常使用（模板语法、组件、生命周期）。如果还没系统学过，建议先完成 ",[2548,2549,2550],"a",{"href":564},"Vue2 使用课程","。虚拟 DOM 篇会用到 Diff 思想，建议先修 ",[2548,2553,2554],{"href":936},"Snabbdom 课程",[1550,2556],{},[1526,2558,2560],{"id":2559},"小节总结","🧾 小节总结",[2562,2563,2564,2567,2570,2579,2588],"ul",{},[2387,2565,2566],{},"读 Vue2 源码的价值在于：排查问题更有方向、写出更合理的代码、理解 API 设计动机。",[2387,2568,2569],{},"课程基于 Vue 2.7.16，这是 2.x 的最后一个 minor 版本，用法与 2.6 基本一致。",[2387,2571,2572,2573,2575,2576,2578],{},"源码目录中，",[1535,2574,1751],{}," 和 ",[1535,2577,1761],{}," 是主线，其他目录按需了解即可。",[2387,2580,2581,2582,2584,2585,2587],{},"调试环境三步走：克隆仓库并切到 v2.7.16 → ",[1535,2583,2420],{}," 构建开发版 → 在 ",[1535,2586,1977],{}," 里写页面用浏览器断点调试。",[2387,2589,2590],{},"读源码的有效方法是：带着具体问题、从入口往下追、配合手写迷你实现验证。",[1550,2592],{},[1526,2594,2596],{"id":2595},"知识问答","❓ 知识问答",[1531,2598,2599],{},[1562,2600,2601],{},"Q1：为什么选 Vue2 而不是直接读 Vue3 源码？",[1531,2603,2604],{},"A：Vue3 目前更主流，但 Vue2 的代码量更小、结构更直观，适合作为读源码的入门材料。而且响应式、虚拟 DOM、模板编译这些核心思想在两个版本里是相通的，先读 Vue2 再看 Vue3 会更容易抓住变化点。",[1531,2606,2607],{},[1562,2608,2609],{},"Q2：我不会用浏览器的断点调试，影响学习吗？",[1531,2611,2612],{},"A：不影响读文章本身，但建议花几分钟熟悉 Chrome DevTools 的 Sources 面板，学会打断点和单步执行。这是读源码的基本工具，之后会频繁用到。",[1531,2614,2615],{},[1562,2616,2617,2618,2575,2620,2622],{},"Q3：",[1535,2619,2420],{},[1535,2621,2424],{}," 有什么区别？",[1531,2624,2625,2626,2628,2629,2631],{},"A：",[1535,2627,2420],{}," 构建带 sourcemap 的未压缩版本，保留完整警告信息，适合调试学习。",[1535,2630,2424],{}," 构建压缩后的生产版本，去掉了警告，不适合读源码。",[1531,2633,2634],{},[1562,2635,2636],{},"Q4：课程中引用的源码和仓库里的代码完全一样吗？",[1531,2638,2639],{},"A：做了教学简化。去掉了 Flow 类型注解和一些边界分支，保留核心逻辑。每处引用都会标注\"简化自\"哪个文件，方便你对照原始代码。",[1531,2641,2642],{},[1562,2643,2644],{},"Q5：读源码一定要手写迷你实现吗？",[1531,2646,2647],{},"A：不是必须，但强烈推荐。看懂和能写出来是两回事，动手写一个几十行的简化版，是检验理解的可靠方式。",[1550,2649],{},[1526,2651,2653],{"id":2652},"小练习","🧪 小练习",[1531,2655,2656,2657,2659,2660,2662,2663,2666,2667,2669],{},"搭建好环境后，试着完成这个练习：在 ",[1535,2658,1981],{}," 中，给 ",[1535,2661,1537],{}," 添加一个 ",[1535,2664,2665],{},"count"," 字段并渲染到页面上，然后在浏览器断点中观察 ",[1535,2668,2465],{}," 的初始化过程。",[1628,2671,2673],{"className":1630,"code":2672,"language":1633,"meta":1634,"style":1634},"const app = new Vue({\n    el: '#app',\n    data() {\n        return {\n            message: 'hello vue2 source',\n            // 请在这里编写代码：添加 count 字段\n        };\n    },\n});\n\n// 请在这里编写代码：三秒后修改 count，并在修改前加 debugger\n",[1535,2674,2675,2692,2707,2716,2723,2738,2743,2748,2753,2762,2766],{"__ignoreMap":1634},[1638,2676,2677,2680,2682,2684,2686,2688,2690],{"class":1640,"line":1641},[1638,2678,2679],{"class":2002},"const",[1638,2681,2178],{"class":2074},[1638,2683,2019],{"class":1994},[1638,2685,2183],{"class":1994},[1638,2687,2186],{"class":1887},[1638,2689,2189],{"class":2074},[1638,2691,2192],{"class":1994},[1638,2693,2694,2697,2699,2701,2703,2705],{"class":1640,"line":1648},[1638,2695,2696],{"class":1998},"    el",[1638,2698,2201],{"class":1994},[1638,2700,2204],{"class":1994},[1638,2702,2207],{"class":1874},[1638,2704,2210],{"class":1994},[1638,2706,2213],{"class":1994},[1638,2708,2709,2712,2714],{"class":1640,"line":1884},[1638,2710,2711],{"class":1998},"    data",[1638,2713,2222],{"class":1994},[1638,2715,2225],{"class":1994},[1638,2717,2718,2721],{"class":1640,"line":1893},[1638,2719,2720],{"class":2231},"        return",[1638,2722,2225],{"class":1994},[1638,2724,2725,2728,2730,2732,2734,2736],{"class":1640,"line":1900},[1638,2726,2727],{"class":1998},"            message",[1638,2729,2201],{"class":1994},[1638,2731,2204],{"class":1994},[1638,2733,2247],{"class":1874},[1638,2735,2210],{"class":1994},[1638,2737,2213],{"class":1994},[1638,2739,2740],{"class":1640,"line":1906},[1638,2741,2742],{"class":1644},"            // 请在这里编写代码：添加 count 字段\n",[1638,2744,2745],{"class":1640,"line":1917},[1638,2746,2747],{"class":1994},"        };\n",[1638,2749,2750],{"class":1640,"line":1922},[1638,2751,2752],{"class":1994},"    },\n",[1638,2754,2755,2758,2760],{"class":1640,"line":1928},[1638,2756,2757],{"class":1994},"}",[1638,2759,2272],{"class":2074},[1638,2761,2275],{"class":1994},[1638,2763,2764],{"class":1640,"line":2136},[1638,2765,1897],{"emptyLinePlaceholder":1896},[1638,2767,2768],{"class":1640,"line":2163},[1638,2769,2770],{"class":1644},"// 请在这里编写代码：三秒后修改 count，并在修改前加 debugger\n",[1531,2772,2773,2774,2777,2778,2780],{},"完成后在 Sources 面板中找到 ",[1535,2775,2776],{},"src/core/instance/init.js","，在 ",[1535,2779,2399],{}," 调用处打断点，观察初始化流程。",[1550,2782],{},[1531,2784,2785,2786,2788],{},"🎉 恭喜你已经搭好 Vue2 源码的调试环境，也有了完整的课程地图！下一篇我们从 ",[1535,2787,2465],{}," 开始，一步步跟踪初始化流程。",[2790,2791,2792],"style",{},"html pre.shiki code .syuKq, html code.shiki .syuKq{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#546E7A;--shiki-default-font-style:italic;--shiki-dark:#676E95;--shiki-dark-font-style:italic}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: 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.smPcV{--shiki-light:#F76D47;--shiki-default:#F78C6C;--shiki-dark:#F78C6C}",{"title":1634,"searchDepth":1648,"depth":1648,"links":2794},[2795,2796,2797,2798,2799,2800,2801,2802,2803,2804],{"id":1528,"depth":1648,"text":1529},{"id":1554,"depth":1648,"text":1555},{"id":1599,"depth":1648,"text":1600},{"id":1615,"depth":1648,"text":1616},{"id":1842,"depth":1648,"text":1843},{"id":2430,"depth":1648,"text":2431},{"id":2486,"depth":1648,"text":2487},{"id":2559,"depth":1648,"text":2560},{"id":2595,"depth":1648,"text":2596},{"id":2652,"depth":1648,"text":2653},"了解为什么要读 Vue2 源码，掌握源码目录结构与本地调试环境的搭建方法。","md",null,{},{"title":1385},{"title":1521,"description":2805},"RtnI9eKVPf",[2813,2815],{"title":1375,"path":1376,"stem":1377,"description":2814,"children":-1},"学会在前端项目中用 fetch 发起 GraphQL 请求，封装通用请求函数，并正确处理数据和错误。",{"title":1391,"path":1392,"stem":1393,"description":2816,"children":-1},"梳理从 new Vue 到页面渲染的完整初始化流程，理解 _init 与 $mount 内部的执行顺序。",1784715105014]