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onclick",[1573,1838,1839],{"class":1579},"=",[1573,1841,1842],{"class":1579},"\"",[1573,1844,1846],{"class":1845},"swgpB","alert",[1573,1848,1850],{"class":1849},"sIEYB","(",[1573,1852,1558],{"class":1627},[1573,1854,1855],{"class":1579},".",[1573,1857,7],{"class":1627},[1573,1859,1855],{"class":1579},[1573,1861,1621],{"class":1627},[1573,1863,1864],{"class":1849},")",[1573,1866,1842],{"class":1579},[1573,1868,1624],{"class":1579},[1573,1870,1871],{"class":1627},"点击显示页面标题",[1573,1873,1631],{"class":1579},[1573,1875,1833],{"class":1583},[1573,1877,1591],{"class":1579},[1573,1879,1881,1883,1885],{"class":1575,"line":1880},22,[1573,1882,1793],{"class":1579},[1573,1884,1805],{"class":1583},[1573,1886,1591],{"class":1579},[1573,1888,1890,1892,1894],{"class":1575,"line":1889},23,[1573,1891,1631],{"class":1579},[1573,1893,1568],{"class":1583},[1573,1895,1591],{"class":1579},[1530,1897,1898,1899,1902,1903,1905,1906,1909,1910,1913],{},"这里的 ",[1556,1900,1901],{},"window.document.title"," 就是通过 ",[1556,1904,1558],{}," 访问当前页面的标题。实际上，我们写 ",[1556,1907,1908],{},"document.title"," 也是可以的，浏览器会默认帮我们加个 ",[1556,1911,1912],{},"window.","。",[1534,1915],{},[1525,1917,1919],{"id":1918},"常用-bom-对象和属性介绍","🌍 常用 BOM 对象和属性介绍",[1921,1922,1924],"h3",{"id":1923},"_1-location-获取和设置-url-地址","1. location —— 获取和设置 URL 地址",[1530,1926,1927,1930],{},[1556,1928,1929],{},"window.location"," 是一个很重要的对象，它包含了当前网页的地址信息。你可以获得页面的 URL，也能用它跳转页面。",[1530,1932,1933],{},"常用属性：",[1935,1936,1937,1944,1953,1962],"ul",{},[1938,1939,1940,1943],"li",{},[1556,1941,1942],{},"location.href","：整个页面的 URL",[1938,1945,1946,1949,1950],{},[1556,1947,1948],{},"location.hostname","：域名，比如 ",[1556,1951,1952],{},"www.example.com",[1938,1954,1955,1958,1959],{},[1556,1956,1957],{},"location.pathname","：路径，比如 ",[1556,1960,1961],{},"/index.html",[1938,1963,1964,1967,1968],{},[1556,1965,1966],{},"location.protocol","：协议，比如 ",[1556,1969,1970],{},"https:",[1530,1972,1973],{},"示例：",[1564,1975,1979],{"className":1976,"code":1977,"language":1978,"meta":1569,"style":1569},"language-js shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","console.log(location.href); // 输出完整URL\nconsole.log(location.hostname); // 输出域名\nconsole.log(location.pathname); // 输出路径\n","js",[1556,1980,1981,2006,2026],{"__ignoreMap":1569},[1573,1982,1983,1986,1988,1991,1994,1996,1999,2002],{"class":1575,"line":1576},[1573,1984,1985],{"class":1627},"console",[1573,1987,1855],{"class":1579},[1573,1989,1990],{"class":1845},"log",[1573,1992,1993],{"class":1627},"(location",[1573,1995,1855],{"class":1579},[1573,1997,1998],{"class":1627},"href)",[1573,2000,2001],{"class":1579},";",[1573,2003,2005],{"class":2004},"syuKq"," // 输出完整URL\n",[1573,2007,2008,2010,2012,2014,2016,2018,2021,2023],{"class":1575,"line":1594},[1573,2009,1985],{"class":1627},[1573,2011,1855],{"class":1579},[1573,2013,1990],{"class":1845},[1573,2015,1993],{"class":1627},[1573,2017,1855],{"class":1579},[1573,2019,2020],{"class":1627},"hostname)",[1573,2022,2001],{"class":1579},[1573,2024,2025],{"class":2004}," // 输出域名\n",[1573,2027,2028,2030,2032,2034,2036,2038,2041,2043],{"class":1575,"line":1604},[1573,2029,1985],{"class":1627},[1573,2031,1855],{"class":1579},[1573,2033,1990],{"class":1845},[1573,2035,1993],{"class":1627},[1573,2037,1855],{"class":1579},[1573,2039,2040],{"class":1627},"pathname)",[1573,2042,2001],{"class":1579},[1573,2044,2045],{"class":2004}," // 输出路径\n",[1530,2047,2048],{},"跳转页面：",[1564,2050,2052],{"className":1976,"code":2051,"language":1978,"meta":1569,"style":1569},"// 跳转到百度\nlocation.href = 'https://www.baidu.com';\n",[1556,2053,2054,2059],{"__ignoreMap":1569},[1573,2055,2056],{"class":1575,"line":1576},[1573,2057,2058],{"class":2004},"// 跳转到百度\n",[1573,2060,2061,2064,2066,2069,2071,2074,2077,2080],{"class":1575,"line":1594},[1573,2062,2063],{"class":1627},"location",[1573,2065,1855],{"class":1579},[1573,2067,2068],{"class":1627},"href ",[1573,2070,1839],{"class":1579},[1573,2072,2073],{"class":1579}," '",[1573,2075,2076],{"class":1849},"https://www.baidu.com",[1573,2078,2079],{"class":1579},"'",[1573,2081,1677],{"class":1579},[1534,2083],{},[1921,2085,2087],{"id":2086},"_2-history-浏览器历史记录","2. history —— 浏览器历史记录",[1530,2089,2090,2093],{},[1556,2091,2092],{},"window.history"," 对象用来操作浏览器的历史记录，可以实现前进、后退、刷新等功能。",[1530,2095,2096],{},"常用方法：",[1935,2098,2099,2105,2111],{},[1938,2100,2101,2104],{},[1556,2102,2103],{},"history.back()","：后退一页",[1938,2106,2107,2110],{},[1556,2108,2109],{},"history.forward()","：前进一页",[1938,2112,2113,2116,2117,2120],{},[1556,2114,2115],{},"history.go(n)","：跳转历史记录的第 n 页，",[1556,2118,2119],{},"n"," 可以是正数或负数",[1530,2122,1973],{},[1564,2124,2126],{"className":1976,"code":2125,"language":1978,"meta":1569,"style":1569},"// 后退一页\nhistory.back();\n\n// 前进一页\nhistory.forward();\n\n// 跳转到前两页\nhistory.go(-2);\n",[1556,2127,2128,2133,2148,2154,2159,2172,2176,2181],{"__ignoreMap":1569},[1573,2129,2130],{"class":1575,"line":1576},[1573,2131,2132],{"class":2004},"// 后退一页\n",[1573,2134,2135,2138,2140,2143,2146],{"class":1575,"line":1594},[1573,2136,2137],{"class":1627},"history",[1573,2139,1855],{"class":1579},[1573,2141,2142],{"class":1845},"back",[1573,2144,2145],{"class":1627},"()",[1573,2147,1677],{"class":1579},[1573,2149,2150],{"class":1575,"line":1604},[1573,2151,2153],{"emptyLinePlaceholder":2152},true,"\n",[1573,2155,2156],{"class":1575,"line":1615},[1573,2157,2158],{"class":2004},"// 前进一页\n",[1573,2160,2161,2163,2165,2168,2170],{"class":1575,"line":1638},[1573,2162,2137],{"class":1627},[1573,2164,1855],{"class":1579},[1573,2166,2167],{"class":1845},"forward",[1573,2169,2145],{"class":1627},[1573,2171,1677],{"class":1579},[1573,2173,2174],{"class":1575,"line":1648},[1573,2175,2153],{"emptyLinePlaceholder":2152},[1573,2177,2178],{"class":1575,"line":1658},[1573,2179,2180],{"class":2004},"// 跳转到前两页\n",[1573,2182,2183,2185,2187,2190,2192,2195,2198,2200],{"class":1575,"line":1680},[1573,2184,2137],{"class":1627},[1573,2186,1855],{"class":1579},[1573,2188,2189],{"class":1845},"go",[1573,2191,1850],{"class":1627},[1573,2193,2194],{"class":1579},"-",[1573,2196,2197],{"class":1688},"2",[1573,2199,1864],{"class":1627},[1573,2201,1677],{"class":1579},[1534,2203],{},[1921,2205,2207],{"id":2206},"_3-alertconfirmprompt-弹窗操作","3. alert、confirm、prompt —— 弹窗操作",[1530,2209,2210],{},"这三个方法也是 BOM 的一部分，可以方便地与用户进行交互。",[1935,2212,2213,2219,2225],{},[1938,2214,2215,2218],{},[1556,2216,2217],{},"alert(message)","：弹出提示框",[1938,2220,2221,2224],{},[1556,2222,2223],{},"confirm(message)","：弹出确认框，返回 true 或 false",[1938,2226,2227,2230],{},[1556,2228,2229],{},"prompt(message, default)","：弹出输入框，返回输入的内容",[1530,2232,1973],{},[1564,2234,2236],{"className":1976,"code":2235,"language":1978,"meta":1569,"style":1569},"alert('欢迎光临！');\n\nif (confirm('你确定离开吗？')) {\n    alert('再见！');\n}\n\nlet name = prompt('请输入你的名字', '张三');\nalert('你好，' + name);\n",[1556,2237,2238,2255,2259,2286,2304,2309,2313,2348],{"__ignoreMap":1569},[1573,2239,2240,2242,2244,2246,2249,2251,2253],{"class":1575,"line":1576},[1573,2241,1846],{"class":1845},[1573,2243,1850],{"class":1627},[1573,2245,2079],{"class":1579},[1573,2247,2248],{"class":1849},"欢迎光临！",[1573,2250,2079],{"class":1579},[1573,2252,1864],{"class":1627},[1573,2254,1677],{"class":1579},[1573,2256,2257],{"class":1575,"line":1594},[1573,2258,2153],{"emptyLinePlaceholder":2152},[1573,2260,2261,2265,2268,2271,2273,2275,2278,2280,2283],{"class":1575,"line":1604},[1573,2262,2264],{"class":2263},"s8pZq","if",[1573,2266,2267],{"class":1627}," (",[1573,2269,2270],{"class":1845},"confirm",[1573,2272,1850],{"class":1627},[1573,2274,2079],{"class":1579},[1573,2276,2277],{"class":1849},"你确定离开吗？",[1573,2279,2079],{"class":1579},[1573,2281,2282],{"class":1627},")) ",[1573,2284,2285],{"class":1579},"{\n",[1573,2287,2288,2291,2293,2295,2298,2300,2302],{"class":1575,"line":1615},[1573,2289,2290],{"class":1845},"    alert",[1573,2292,1850],{"class":1583},[1573,2294,2079],{"class":1579},[1573,2296,2297],{"class":1849},"再见！",[1573,2299,2079],{"class":1579},[1573,2301,1864],{"class":1583},[1573,2303,1677],{"class":1579},[1573,2305,2306],{"class":1575,"line":1638},[1573,2307,2308],{"class":1579},"}\n",[1573,2310,2311],{"class":1575,"line":1648},[1573,2312,2153],{"emptyLinePlaceholder":2152},[1573,2314,2315,2318,2321,2323,2326,2328,2330,2333,2335,2337,2339,2342,2344,2346],{"class":1575,"line":1658},[1573,2316,2317],{"class":1587},"let",[1573,2319,2320],{"class":1627}," name ",[1573,2322,1839],{"class":1579},[1573,2324,2325],{"class":1845}," prompt",[1573,2327,1850],{"class":1627},[1573,2329,2079],{"class":1579},[1573,2331,2332],{"class":1849},"请输入你的名字",[1573,2334,2079],{"class":1579},[1573,2336,1671],{"class":1579},[1573,2338,2073],{"class":1579},[1573,2340,2341],{"class":1849},"张三",[1573,2343,2079],{"class":1579},[1573,2345,1864],{"class":1627},[1573,2347,1677],{"class":1579},[1573,2349,2350,2352,2354,2356,2359,2361,2364,2367],{"class":1575,"line":1680},[1573,2351,1846],{"class":1845},[1573,2353,1850],{"class":1627},[1573,2355,2079],{"class":1579},[1573,2357,2358],{"class":1849},"你好，",[1573,2360,2079],{"class":1579},[1573,2362,2363],{"class":1579}," +",[1573,2365,2366],{"class":1627}," name)",[1573,2368,1677],{"class":1579},[1534,2370],{},[1921,2372,2374],{"id":2373},"_4-navigator-浏览器信息","4. navigator —— 浏览器信息",[1530,2376,2377,2380],{},[1556,2378,2379],{},"window.navigator"," 对象包含了浏览器的相关信息，比如浏览器名称、版本、操作系统等。",[1530,2382,1973],{},[1564,2384,2386],{"className":1976,"code":2385,"language":1978,"meta":1569,"style":1569},"console.log('浏览器名称：' + navigator.appName);\nconsole.log('浏览器版本：' + navigator.appVersion);\nconsole.log('操作系统：' + navigator.platform);\n",[1556,2387,2388,2417,2445],{"__ignoreMap":1569},[1573,2389,2390,2392,2394,2396,2398,2400,2403,2405,2407,2410,2412,2415],{"class":1575,"line":1576},[1573,2391,1985],{"class":1627},[1573,2393,1855],{"class":1579},[1573,2395,1990],{"class":1845},[1573,2397,1850],{"class":1627},[1573,2399,2079],{"class":1579},[1573,2401,2402],{"class":1849},"浏览器名称：",[1573,2404,2079],{"class":1579},[1573,2406,2363],{"class":1579},[1573,2408,2409],{"class":1627}," navigator",[1573,2411,1855],{"class":1579},[1573,2413,2414],{"class":1627},"appName)",[1573,2416,1677],{"class":1579},[1573,2418,2419,2421,2423,2425,2427,2429,2432,2434,2436,2438,2440,2443],{"class":1575,"line":1594},[1573,2420,1985],{"class":1627},[1573,2422,1855],{"class":1579},[1573,2424,1990],{"class":1845},[1573,2426,1850],{"class":1627},[1573,2428,2079],{"class":1579},[1573,2430,2431],{"class":1849},"浏览器版本：",[1573,2433,2079],{"class":1579},[1573,2435,2363],{"class":1579},[1573,2437,2409],{"class":1627},[1573,2439,1855],{"class":1579},[1573,2441,2442],{"class":1627},"appVersion)",[1573,2444,1677],{"class":1579},[1573,2446,2447,2449,2451,2453,2455,2457,2460,2462,2464,2466,2468,2471],{"class":1575,"line":1604},[1573,2448,1985],{"class":1627},[1573,2450,1855],{"class":1579},[1573,2452,1990],{"class":1845},[1573,2454,1850],{"class":1627},[1573,2456,2079],{"class":1579},[1573,2458,2459],{"class":1849},"操作系统：",[1573,2461,2079],{"class":1579},[1573,2463,2363],{"class":1579},[1573,2465,2409],{"class":1627},[1573,2467,1855],{"class":1579},[1573,2469,2470],{"class":1627},"platform)",[1573,2472,1677],{"class":1579},[1534,2474],{},[1921,2476,2478],{"id":2477},"_5-screen-屏幕信息","5. screen —— 屏幕信息",[1530,2480,2481,2484],{},[1556,2482,2483],{},"window.screen"," 对象包含了用户屏幕的分辨率、宽高等信息。",[1530,2486,1973],{},[1564,2488,2490],{"className":1976,"code":2489,"language":1978,"meta":1569,"style":1569},"console.log('屏幕宽度：' + screen.width);\nconsole.log('屏幕高度：' + screen.height);\nconsole.log('可用宽度：' + screen.availWidth);\nconsole.log('可用高度：' + screen.availHeight);\n",[1556,2491,2492,2521,2549,2577],{"__ignoreMap":1569},[1573,2493,2494,2496,2498,2500,2502,2504,2507,2509,2511,2514,2516,2519],{"class":1575,"line":1576},[1573,2495,1985],{"class":1627},[1573,2497,1855],{"class":1579},[1573,2499,1990],{"class":1845},[1573,2501,1850],{"class":1627},[1573,2503,2079],{"class":1579},[1573,2505,2506],{"class":1849},"屏幕宽度：",[1573,2508,2079],{"class":1579},[1573,2510,2363],{"class":1579},[1573,2512,2513],{"class":1627}," screen",[1573,2515,1855],{"class":1579},[1573,2517,2518],{"class":1627},"width)",[1573,2520,1677],{"class":1579},[1573,2522,2523,2525,2527,2529,2531,2533,2536,2538,2540,2542,2544,2547],{"class":1575,"line":1594},[1573,2524,1985],{"class":1627},[1573,2526,1855],{"class":1579},[1573,2528,1990],{"class":1845},[1573,2530,1850],{"class":1627},[1573,2532,2079],{"class":1579},[1573,2534,2535],{"class":1849},"屏幕高度：",[1573,2537,2079],{"class":1579},[1573,2539,2363],{"class":1579},[1573,2541,2513],{"class":1627},[1573,2543,1855],{"class":1579},[1573,2545,2546],{"class":1627},"height)",[1573,2548,1677],{"class":1579},[1573,2550,2551,2553,2555,2557,2559,2561,2564,2566,2568,2570,2572,2575],{"class":1575,"line":1604},[1573,2552,1985],{"class":1627},[1573,2554,1855],{"class":1579},[1573,2556,1990],{"class":1845},[1573,2558,1850],{"class":1627},[1573,2560,2079],{"class":1579},[1573,2562,2563],{"class":1849},"可用宽度：",[1573,2565,2079],{"class":1579},[1573,2567,2363],{"class":1579},[1573,2569,2513],{"class":1627},[1573,2571,1855],{"class":1579},[1573,2573,2574],{"class":1627},"availWidth)",[1573,2576,1677],{"class":1579},[1573,2578,2579,2581,2583,2585,2587,2589,2592,2594,2596,2598,2600,2603],{"class":1575,"line":1615},[1573,2580,1985],{"class":1627},[1573,2582,1855],{"class":1579},[1573,2584,1990],{"class":1845},[1573,2586,1850],{"class":1627},[1573,2588,2079],{"class":1579},[1573,2590,2591],{"class":1849},"可用高度：",[1573,2593,2079],{"class":1579},[1573,2595,2363],{"class":1579},[1573,2597,2513],{"class":1627},[1573,2599,1855],{"class":1579},[1573,2601,2602],{"class":1627},"availHeight)",[1573,2604,1677],{"class":1579},[1534,2606],{},[1525,2608,2610],{"id":2609},"bom-定时器settimeout-和-setinterval","⏰ BOM 定时器：setTimeout 和 setInterval",[1530,2612,2613],{},"在网页开发中，时不时需要做一些延迟操作或重复执行任务，BOM 给我们提供了两个非常实用的定时器函数：",[1935,2615,2616,2622],{},[1938,2617,2618,2621],{},[1556,2619,2620],{},"setTimeout(fn, delay)","：延迟执行一次函数",[1938,2623,2624,2627],{},[1556,2625,2626],{},"setInterval(fn, interval)","：每隔指定时间执行函数",[1530,2629,1973],{},[1564,2631,2633],{"className":1976,"code":2632,"language":1978,"meta":1569,"style":1569},"// 2秒后弹窗提醒\nsetTimeout(function () {\n    alert('2秒到了！');\n}, 2000);\n\n// 每隔1秒打印当前时间\nsetInterval(function () {\n    console.log(new Date().toLocaleTimeString());\n}, 1000);\n",[1556,2634,2635,2640,2655,2672,2684,2688,2693,2706,2735],{"__ignoreMap":1569},[1573,2636,2637],{"class":1575,"line":1576},[1573,2638,2639],{"class":2004},"// 2秒后弹窗提醒\n",[1573,2641,2642,2645,2647,2650,2653],{"class":1575,"line":1594},[1573,2643,2644],{"class":1845},"setTimeout",[1573,2646,1850],{"class":1627},[1573,2648,2649],{"class":1587},"function",[1573,2651,2652],{"class":1579}," ()",[1573,2654,1655],{"class":1579},[1573,2656,2657,2659,2661,2663,2666,2668,2670],{"class":1575,"line":1604},[1573,2658,2290],{"class":1845},[1573,2660,1850],{"class":1583},[1573,2662,2079],{"class":1579},[1573,2664,2665],{"class":1849},"2秒到了！",[1573,2667,2079],{"class":1579},[1573,2669,1864],{"class":1583},[1573,2671,1677],{"class":1579},[1573,2673,2674,2677,2680,2682],{"class":1575,"line":1615},[1573,2675,2676],{"class":1579},"},",[1573,2678,2679],{"class":1688}," 2000",[1573,2681,1864],{"class":1627},[1573,2683,1677],{"class":1579},[1573,2685,2686],{"class":1575,"line":1638},[1573,2687,2153],{"emptyLinePlaceholder":2152},[1573,2689,2690],{"class":1575,"line":1648},[1573,2691,2692],{"class":2004},"// 每隔1秒打印当前时间\n",[1573,2694,2695,2698,2700,2702,2704],{"class":1575,"line":1658},[1573,2696,2697],{"class":1845},"setInterval",[1573,2699,1850],{"class":1627},[1573,2701,2649],{"class":1587},[1573,2703,2652],{"class":1579},[1573,2705,1655],{"class":1579},[1573,2707,2708,2711,2713,2715,2717,2720,2723,2725,2727,2730,2733],{"class":1575,"line":1680},[1573,2709,2710],{"class":1627},"    console",[1573,2712,1855],{"class":1579},[1573,2714,1990],{"class":1845},[1573,2716,1850],{"class":1583},[1573,2718,2719],{"class":1579},"new",[1573,2721,2722],{"class":1845}," Date",[1573,2724,2145],{"class":1583},[1573,2726,1855],{"class":1579},[1573,2728,2729],{"class":1845},"toLocaleTimeString",[1573,2731,2732],{"class":1583},"())",[1573,2734,1677],{"class":1579},[1573,2736,2737,2739,2742,2744],{"class":1575,"line":1694},[1573,2738,2676],{"class":1579},[1573,2740,2741],{"class":1688}," 1000",[1573,2743,1864],{"class":1627},[1573,2745,1677],{"class":1579},[2747,2748,2749],"tip",{},[1530,2750,2751,2752,2755,2756,2759],{},"使用定时器时，记得配合 ",[1556,2753,2754],{},"clearTimeout"," 和 ",[1556,2757,2758],{},"clearInterval"," 来取消定时任务，避免造成不必要的性能浪费或内存泄露。",[1534,2761],{},[1525,2763,2765],{"id":2764},"小节总结","🧾 小节总结",[1935,2767,2768,2774,2796],{},[1938,2769,2770,2771,2773],{},"BOM 是浏览器对象模型，主要通过 ",[1556,2772,1558],{}," 操作浏览器环境，比如地址栏、历史记录、弹窗等。",[1938,2775,2776,2777,2779,2780,2779,2782,2779,2785,2788,2789,2779,2791,2779,2793,1913],{},"常用 BOM 对象有 ",[1556,2778,2063],{},"、",[1556,2781,2137],{},[1556,2783,2784],{},"navigator",[1556,2786,2787],{},"screen","，以及弹窗方法 ",[1556,2790,1846],{},[1556,2792,2270],{},[1556,2794,2795],{},"prompt",[1938,2797,2798,2799,2755,2801,2803],{},"定时器 ",[1556,2800,2644],{},[1556,2802,2697],{}," 方便实现延迟执行和周期任务，是前端开发中不可或缺的工具。",[1534,2805],{},[1525,2807,2809],{"id":2808},"知识问答qa","❓ 知识问答（Q&A）",[1530,2811,2812],{},"Q：BOM 是什么，它和 DOM 有什么区别？",[1530,2814,2815,2816,2818],{},"A：BOM（浏览器对象模型）是浏览器提供的操作浏览器窗口和环境的接口，主要是通过 ",[1556,2817,1558],{}," 对象，负责浏览器相关操作。DOM 是文档对象模型，专注于操作网页的内容和结构。两者关注点不同，但经常一起使用。",[1530,2820,2821],{},"Q：如何通过 BOM 实现页面跳转？",[1530,2823,2824,2825,2828,2829,1913],{},"A：可以通过设置 ",[1556,2826,2827],{},"window.location.href"," 属性为新的 URL 来实现页面跳转，比如 ",[1556,2830,2831],{},"location.href = \"https://www.baidu.com\";",[1530,2833,2834,2835,2837],{},"Q：什么情况下会用到 ",[1556,2836,2697],{},"？",[1530,2839,2840,2841,1913],{},"A：当你想让某个操作每隔固定时间重复执行时，比如每秒更新一次时钟，或者轮播图自动切换，就会用到 ",[1556,2842,2697],{},[1534,2844],{},[1525,2846,2848],{"id":2847},"小练习","🧪 小练习",[1921,2850,2852],{"id":2851},"练习1获取并显示当前网址的域名和路径","练习1：获取并显示当前网址的域名和路径",[1564,2854,2856],{"className":1566,"code":2855,"language":1568,"meta":1569,"style":1569},"\u003C!DOCTYPE html>\n\u003Chtml>\n    \u003Chead>\n        \u003Ctitle>BOM练习1\u003C/title>\n        \u003Cstyle>\n            body {\n                font-family: Arial, sans-serif;\n                padding: 20px;\n            }\n            #info {\n                margin-top: 20px;\n                font-size: 16px;\n                color: #333;\n            }\n        \u003C/style>\n    \u003C/head>\n    \u003Cbody>\n        \u003Ch3>显示当前网页的域名和路径\u003C/h3>\n        \u003Cbutton id=\"btn\">显示地址信息\u003C/button>\n        \u003Cdiv id=\"info\">\u003C/div>\n\n        \u003Cscript>\n            document.getElementById('btn').onclick = function () {\n                // 在这里写你的代码，显示网页域名和路径\n            };\n        \u003C/script>\n    \u003C/body>\n\u003C/html>\n",[1556,2857,2858,2868,2876,2884,2901,2909,2915,2929,2939,2943,2953,2964,2976,2990,2994,3002,3010,3018,3035,3064,3088,3092,3101,3136,3142,3148,3157,3166],{"__ignoreMap":1569},[1573,2859,2860,2862,2864,2866],{"class":1575,"line":1576},[1573,2861,1580],{"class":1579},[1573,2863,1584],{"class":1583},[1573,2865,1588],{"class":1587},[1573,2867,1591],{"class":1579},[1573,2869,2870,2872,2874],{"class":1575,"line":1594},[1573,2871,1597],{"class":1579},[1573,2873,1568],{"class":1583},[1573,2875,1591],{"class":1579},[1573,2877,2878,2880,2882],{"class":1575,"line":1604},[1573,2879,1607],{"class":1579},[1573,2881,1610],{"class":1583},[1573,2883,1591],{"class":1579},[1573,2885,2886,2888,2890,2892,2895,2897,2899],{"class":1575,"line":1615},[1573,2887,1618],{"class":1579},[1573,2889,1621],{"class":1583},[1573,2891,1624],{"class":1579},[1573,2893,2894],{"class":1627},"BOM练习1",[1573,2896,1631],{"class":1579},[1573,2898,1621],{"class":1583},[1573,2900,1591],{"class":1579},[1573,2902,2903,2905,2907],{"class":1575,"line":1638},[1573,2904,1618],{"class":1579},[1573,2906,1643],{"class":1583},[1573,2908,1591],{"class":1579},[1573,2910,2911,2913],{"class":1575,"line":1648},[1573,2912,1652],{"class":1651},[1573,2914,1655],{"class":1579},[1573,2916,2917,2919,2921,2923,2925,2927],{"class":1575,"line":1658},[1573,2918,1662],{"class":1661},[1573,2920,1665],{"class":1579},[1573,2922,1668],{"class":1627},[1573,2924,1671],{"class":1579},[1573,2926,1674],{"class":1627},[1573,2928,1677],{"class":1579},[1573,2930,2931,2933,2935,2937],{"class":1575,"line":1680},[1573,2932,1697],{"class":1661},[1573,2934,1665],{"class":1579},[1573,2936,1702],{"class":1688},[1573,2938,1677],{"class":1579},[1573,2940,2941],{"class":1575,"line":1694},[1573,2942,1710],{"class":1579},[1573,2944,2945,2948,2951],{"class":1575,"line":1707},[1573,2946,2947],{"class":1579},"            #",[1573,2949,2950],{"class":1688},"info",[1573,2952,1655],{"class":1579},[1573,2954,2955,2958,2960,2962],{"class":1575,"line":1713},[1573,2956,2957],{"class":1661},"                margin-top",[1573,2959,1665],{"class":1579},[1573,2961,1702],{"class":1688},[1573,2963,1677],{"class":1579},[1573,2965,2966,2969,2971,2974],{"class":1575,"line":1721},[1573,2967,2968],{"class":1661},"                font-size",[1573,2970,1665],{"class":1579},[1573,2972,2973],{"class":1688}," 16px",[1573,2975,1677],{"class":1579},[1573,2977,2978,2981,2983,2985,2988],{"class":1575,"line":1737},[1573,2979,2980],{"class":1661},"                color",[1573,2982,1665],{"class":1579},[1573,2984,1729],{"class":1579},[1573,2986,2987],{"class":1627},"333",[1573,2989,1677],{"class":1579},[1573,2991,2992],{"class":1575,"line":1749},[1573,2993,1710],{"class":1579},[1573,2995,2996,2998,3000],{"class":1575,"line":1762},[1573,2997,1783],{"class":1579},[1573,2999,1643],{"class":1583},[1573,3001,1591],{"class":1579},[1573,3003,3004,3006,3008],{"class":1575,"line":1775},[1573,3005,1793],{"class":1579},[1573,3007,1610],{"class":1583},[1573,3009,1591],{"class":1579},[1573,3011,3012,3014,3016],{"class":1575,"line":1780},[1573,3013,1607],{"class":1579},[1573,3015,1805],{"class":1583},[1573,3017,1591],{"class":1579},[1573,3019,3020,3022,3024,3026,3029,3031,3033],{"class":1575,"line":1790},[1573,3021,1618],{"class":1579},[1573,3023,1921],{"class":1583},[1573,3025,1624],{"class":1579},[1573,3027,3028],{"class":1627},"显示当前网页的域名和路径",[1573,3030,1631],{"class":1579},[1573,3032,1921],{"class":1583},[1573,3034,1591],{"class":1579},[1573,3036,3037,3039,3041,3044,3046,3048,3051,3053,3055,3058,3060,3062],{"class":1575,"line":1800},[1573,3038,1618],{"class":1579},[1573,3040,1833],{"class":1583},[1573,3042,3043],{"class":1587}," id",[1573,3045,1839],{"class":1579},[1573,3047,1842],{"class":1579},[1573,3049,3050],{"class":1849},"btn",[1573,3052,1842],{"class":1579},[1573,3054,1624],{"class":1579},[1573,3056,3057],{"class":1627},"显示地址信息",[1573,3059,1631],{"class":1579},[1573,3061,1833],{"class":1583},[1573,3063,1591],{"class":1579},[1573,3065,3066,3068,3071,3073,3075,3077,3079,3081,3084,3086],{"class":1575,"line":1810},[1573,3067,1618],{"class":1579},[1573,3069,3070],{"class":1583},"div",[1573,3072,3043],{"class":1587},[1573,3074,1839],{"class":1579},[1573,3076,1842],{"class":1579},[1573,3078,2950],{"class":1849},[1573,3080,1842],{"class":1579},[1573,3082,3083],{"class":1579},">\u003C/",[1573,3085,3070],{"class":1583},[1573,3087,1591],{"class":1579},[1573,3089,3090],{"class":1575,"line":1828},[1573,3091,2153],{"emptyLinePlaceholder":2152},[1573,3093,3094,3096,3099],{"class":1575,"line":1880},[1573,3095,1618],{"class":1579},[1573,3097,3098],{"class":1583},"script",[1573,3100,1591],{"class":1579},[1573,3102,3103,3106,3108,3111,3113,3115,3117,3119,3121,3123,3126,3129,3132,3134],{"class":1575,"line":1889},[1573,3104,3105],{"class":1627},"            document",[1573,3107,1855],{"class":1579},[1573,3109,3110],{"class":1845},"getElementById",[1573,3112,1850],{"class":1627},[1573,3114,2079],{"class":1579},[1573,3116,3050],{"class":1849},[1573,3118,2079],{"class":1579},[1573,3120,1864],{"class":1627},[1573,3122,1855],{"class":1579},[1573,3124,3125],{"class":1845},"onclick",[1573,3127,3128],{"class":1579}," =",[1573,3130,3131],{"class":1587}," function",[1573,3133,2652],{"class":1579},[1573,3135,1655],{"class":1579},[1573,3137,3139],{"class":1575,"line":3138},24,[1573,3140,3141],{"class":2004},"                // 在这里写你的代码，显示网页域名和路径\n",[1573,3143,3145],{"class":1575,"line":3144},25,[1573,3146,3147],{"class":1579},"            };\n",[1573,3149,3151,3153,3155],{"class":1575,"line":3150},26,[1573,3152,1783],{"class":1579},[1573,3154,3098],{"class":1583},[1573,3156,1591],{"class":1579},[1573,3158,3160,3162,3164],{"class":1575,"line":3159},27,[1573,3161,1793],{"class":1579},[1573,3163,1805],{"class":1583},[1573,3165,1591],{"class":1579},[1573,3167,3169,3171,3173],{"class":1575,"line":3168},28,[1573,3170,1631],{"class":1579},[1573,3172,1568],{"class":1583},[1573,3174,1591],{"class":1579},[1921,3176,3178],{"id":3177},"练习2使用定时器实现每秒显示当前时间并提供按钮停止计时","练习2：使用定时器实现每秒显示当前时间，并提供按钮停止计时",[1564,3180,3182],{"className":1566,"code":3181,"language":1568,"meta":1569,"style":1569},"\u003C!DOCTYPE html>\n\u003Chtml>\n    \u003Chead>\n        \u003Ctitle>BOM练习2\u003C/title>\n        \u003Cstyle>\n            body {\n                font-family: Arial, sans-serif;\n                padding: 20px;\n            }\n            #time {\n                font-size: 20px;\n                color: #007acc;\n            }\n            button {\n                margin-top: 10px;\n                padding: 5px 10px;\n                font-size: 16px;\n            }\n        \u003C/style>\n    \u003C/head>\n    \u003Cbody>\n        \u003Ch3>每秒显示当前时间，点击按钮停止\u003C/h3>\n        \u003Cdiv id=\"time\">--:--:--\u003C/div>\n        \u003Cbutton id=\"stopBtn\">停止显示时间\u003C/button>\n\n        \u003Cscript>\n            var timer = setInterval(function () {\n                var now = new Date();\n                document.getElementById('time').textContent = now.toLocaleTimeString();\n            }, 1000);\n\n            // 在这里编写你的代码，停止时间显示。\n        \u003C/script>\n    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           button",[1573,3311,1655],{"class":1579},[1573,3313,3314,3316,3318,3320],{"class":1575,"line":1762},[1573,3315,2957],{"class":1661},[1573,3317,1665],{"class":1579},[1573,3319,1744],{"class":1688},[1573,3321,1677],{"class":1579},[1573,3323,3324,3326,3328,3330,3332],{"class":1575,"line":1775},[1573,3325,1697],{"class":1661},[1573,3327,1665],{"class":1579},[1573,3329,1757],{"class":1688},[1573,3331,1744],{"class":1688},[1573,3333,1677],{"class":1579},[1573,3335,3336,3338,3340,3342],{"class":1575,"line":1780},[1573,3337,2968],{"class":1661},[1573,3339,1665],{"class":1579},[1573,3341,2973],{"class":1688},[1573,3343,1677],{"class":1579},[1573,3345,3346],{"class":1575,"line":1790},[1573,3347,1710],{"class":1579},[1573,3349,3350,3352,3354],{"class":1575,"line":1800},[1573,3351,1783],{"class":1579},[1573,3353,1643],{"class":1583},[1573,3355,1591],{"class":1579},[1573,3357,3358,3360,3362],{"class":1575,"line":1810},[1573,3359,1793],{"class":1579},[1573,3361,1610],{"class":1583},[1573,3363,1591],{"class":1579},[1573,3365,3366,3368,3370],{"class":1575,"line":1828},[1573,3367,1607],{"class":1579},[1573,3369,1805],{"class":1583},[1573,3371,1591],{"class":1579},[1573,3373,3374,3376,3378,3380,3383,3385,3387],{"class":1575,"line":1880},[1573,3375,1618],{"class":1579},[1573,3377,1921],{"class":1583},[1573,3379,1624],{"class":1579},[1573,3381,3382],{"class":1627},"每秒显示当前时间，点击按钮停止",[1573,3384,1631],{"class":1579},[1573,3386,1921],{"class":1583},[1573,3388,1591],{"class":1579},[1573,3390,3391,3393,3395,3397,3399,3401,3403,3405,3407,3410,3412,3414],{"class":1575,"line":1889},[1573,3392,1618],{"class":1579},[1573,3394,3070],{"class":1583},[1573,3396,3043],{"class":1587},[1573,3398,1839],{"class":1579},[1573,3400,1842],{"class":1579},[1573,3402,3275],{"class":1849},[1573,3404,1842],{"class":1579},[1573,3406,1624],{"class":1579},[1573,3408,3409],{"class":1627},"--:--:--",[1573,3411,1631],{"class":1579},[1573,3413,3070],{"class":1583},[1573,3415,1591],{"class":1579},[1573,3417,3418,3420,3422,3424,3426,3428,3431,3433,3435,3438,3440,3442],{"class":1575,"line":3138},[1573,3419,1618],{"class":1579},[1573,3421,1833],{"class":1583},[1573,3423,3043],{"class":1587},[1573,3425,1839],{"class":1579},[1573,3427,1842],{"class":1579},[1573,3429,3430],{"class":1849},"stopBtn",[1573,3432,1842],{"class":1579},[1573,3434,1624],{"class":1579},[1573,3436,3437],{"class":1627},"停止显示时间",[1573,3439,1631],{"class":1579},[1573,3441,1833],{"class":1583},[1573,3443,1591],{"class":1579},[1573,3445,3446],{"class":1575,"line":3144},[1573,3447,2153],{"emptyLinePlaceholder":2152},[1573,3449,3450,3452,3454],{"class":1575,"line":3150},[1573,3451,1618],{"class":1579},[1573,3453,3098],{"class":1583},[1573,3455,1591],{"class":1579},[1573,3457,3458,3461,3464,3466,3469,3471,3473,3475],{"class":1575,"line":3159},[1573,3459,3460],{"class":1587}," 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在这里编写你的代码，停止时间显示。\n",[1573,3557,3559,3561,3563],{"class":1575,"line":3558},33,[1573,3560,1783],{"class":1579},[1573,3562,3098],{"class":1583},[1573,3564,1591],{"class":1579},[1573,3566,3568,3570,3572],{"class":1575,"line":3567},34,[1573,3569,1793],{"class":1579},[1573,3571,1805],{"class":1583},[1573,3573,1591],{"class":1579},[1573,3575,3577,3579,3581],{"class":1575,"line":3576},35,[1573,3578,1631],{"class":1579},[1573,3580,1568],{"class":1583},[1573,3582,1591],{"class":1579},[1534,3584],{},[1530,3586,3587],{},"🎉 恭喜你已经掌握了浏览器 BOM 的基本操作，window 对象的使用，location、history、navigator、screen，以及定时器 setTimeout 和 setInterval 的技能啦！继续练习，你会成为更棒的前端开发者！",[1643,3589,3590],{},"html pre.shiki code .s86vT, html code.shiki .s86vT{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .sd2Uz, html code.shiki .sd2Uz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html pre.shiki code .s50WR, html code.shiki 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BOM，掌握浏览器窗口、页面地址、定时器等实用知识。","md",null,{},{"title":195},{"title":195,"description":3610},"8uz3MVFT4x",[3618,3620],{"title":191,"path":192,"stem":193,"description":3619,"children":-1},"通过这篇文章，初学者能了解什么是 DOM，如何用 JavaScript 操作 DOM，让网页内容和结构动态变化。",{"title":199,"path":200,"stem":201,"description":3621,"children":-1},"帮助刚入门的你了解什么是JavaScript事件，以及如何使用事件让网页更灵活。",1784715106250]