{"id":31091,"date":"2021-10-20T22:00:07","date_gmt":"2021-10-20T14:00:07","guid":{"rendered":"https:\/\/web4theme.com\/?p=31091"},"modified":"2021-10-20T22:00:07","modified_gmt":"2021-10-20T14:00:07","slug":"html-css-js-%e9%9d%a2%e8%a9%a6%e8%80%83%e9%a1%8c","status":"publish","type":"post","link":"https:\/\/web4theme.com\/?p=31091","title":{"rendered":"HTML CSS JS \u9762\u8a66\u8003\u984c"},"content":{"rendered":"\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_73 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/web4theme.com\/?p=31091\/#1%E6%A8%99%E7%B1%A4%E4%B8%8A_title_%E8%88%87_alt_%E5%B1%AC%E6%80%A7%E7%9A%84%E5%8D%80%E5%88%A5%E6%98%AF%E4%BB%80%E9%BA%BC%EF%BC%9F\" title=\"1.\u6a19\u7c64\u4e0a title \u8207 alt \u5c6c\u6027\u7684\u5340\u5225\u662f\u4ec0\u9ebc\uff1f\">1.\u6a19\u7c64\u4e0a title \u8207 alt \u5c6c\u6027\u7684\u5340\u5225\u662f\u4ec0\u9ebc\uff1f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/web4theme.com\/?p=31091\/#2CSS_%E7%9A%84%E7%9B%92%E5%AD%90%E6%A8%A1%E5%9E%8B%E7%B5%84%E6%88%90%EF%BC%9F\" title=\"2.CSS \u7684\u76d2\u5b50\u6a21\u578b\u7d44\u6210\uff1f\">2.CSS \u7684\u76d2\u5b50\u6a21\u578b\u7d44\u6210\uff1f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/web4theme.com\/?p=31091\/#3css_%E9%81%B8%E6%93%87%E5%99%A8%E5%84%AA%E5%85%88%E7%B4%9A%EF%BC%9F\" title=\"3.css \u9078\u64c7\u5668\u512a\u5148\u7d1a\uff1f\">3.css \u9078\u64c7\u5668\u512a\u5148\u7d1a\uff1f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/web4theme.com\/?p=31091\/#4%E5%9E%82%E7%9B%B4%E6%B0%B4%E5%B9%B3%E5%B1%85%E4%B8%AD%E5%B9%BE%E7%A8%AE%E6%96%B9%E5%BC%8F%EF%BC%9F\" title=\"4.\u5782\u76f4\u6c34\u5e73\u5c45\u4e2d\u5e7e\u7a2e\u65b9\u5f0f\uff1f\">4.\u5782\u76f4\u6c34\u5e73\u5c45\u4e2d\u5e7e\u7a2e\u65b9\u5f0f\uff1f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/web4theme.com\/?p=31091\/#5position%E7%9A%84%E5%80%BC%EF%BC%8C_relative%E5%92%8Cabsolute%E5%88%86%E5%88%A5%E6%98%AF%E7%9B%B8%E5%B0%8D%E6%96%BC%E8%AA%B0%E9%80%B2%E8%A1%8C%E5%AE%9A%E4%BD%8D%E7%9A%84%EF%BC%9F\" title=\"5.position\u7684\u503c\uff0c relative\u548cabsolute\u5206\u5225\u662f\u76f8\u5c0d\u65bc\u8ab0\u9032\u884c\u5b9a\u4f4d\u7684\uff1f\">5.position\u7684\u503c\uff0c relative\u548cabsolute\u5206\u5225\u662f\u76f8\u5c0d\u65bc\u8ab0\u9032\u884c\u5b9a\u4f4d\u7684\uff1f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/web4theme.com\/?p=31091\/#6JS_%E6%95%B8%E6%93%9A%E9%A1%9E%E5%9E%8B%E6%9C%89%E5%93%AA%E4%BA%9B\" title=\"6.JS \u6578\u64da\u985e\u578b\u6709\u54ea\u4e9b ?\">6.JS \u6578\u64da\u985e\u578b\u6709\u54ea\u4e9b ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/web4theme.com\/?p=31091\/#7%E3%80%8C_%E3%80%8D%E3%80%81%E3%80%8C_%E3%80%8D%E7%9A%84%E5%8D%80%E5%88%A5%EF%BC%9F\" title=\"7.\u300c ===\u300d\u3001\u300c ==\u300d\u7684\u5340\u5225\uff1f\">7.\u300c ===\u300d\u3001\u300c ==\u300d\u7684\u5340\u5225\uff1f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/web4theme.com\/?p=31091\/#8var%E3%80%81%E3%80%90let%E3%80%81const_%E5%8D%80%E5%88%A5%EF%BC%9F\" title=\"8.var\u3001\u3010let\u3001const \u5340\u5225\uff1f\">8.var\u3001\u3010let\u3001const \u5340\u5225\uff1f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/web4theme.com\/?p=31091\/#9GET%E5%92%8CPOST%E7%9A%84%E5%8D%80%E5%88%A5%EF%BC%8C%E4%BD%95%E6%99%82%E4%BD%BF%E7%94%A8POST%EF%BC%9F\" title=\"9.GET\u548cPOST\u7684\u5340\u5225\uff0c\u4f55\u6642\u4f7f\u7528POST\uff1f\">9.GET\u548cPOST\u7684\u5340\u5225\uff0c\u4f55\u6642\u4f7f\u7528POST\uff1f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/web4theme.com\/?p=31091\/#101rem%E3%80%811em%E3%80%811vh%E3%80%811px%E5%90%84%E8%87%AA%E4%BB%A3%E8%A1%A8%E7%9A%84%E5%90%AB%E7%BE%A9%EF%BC%9F\" title=\"10.1rem\u30011em\u30011vh\u30011px\u5404\u81ea\u4ee3\u8868\u7684\u542b\u7fa9\uff1f\">10.1rem\u30011em\u30011vh\u30011px\u5404\u81ea\u4ee3\u8868\u7684\u542b\u7fa9\uff1f<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1%E6%A8%99%E7%B1%A4%E4%B8%8A_title_%E8%88%87_alt_%E5%B1%AC%E6%80%A7%E7%9A%84%E5%8D%80%E5%88%A5%E6%98%AF%E4%BB%80%E9%BA%BC%EF%BC%9F\"><\/span>1.\u6a19\u7c64\u4e0a title \u8207 alt \u5c6c\u6027\u7684\u5340\u5225\u662f\u4ec0\u9ebc\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>alt \u662f\u7d66\u641c\u7d22\u5f15\u64ce\u8b58\u5225\uff0c\u5728\u5716\u50cf\u7121\u6cd5\u986f\u793a\u6642\u7684\u66ff\u4ee3\u6587\u672c\uff1b<br>title \u662f\u95dc\u65bc\u5143\u7d20\u7684\u6ce8\u91cb\u4fe1\u606f\uff0c\u4e3b\u8981\u662f\u7d66\u7528\u6236\u89e3\u8b80\u3002<br>\u7576\u9f20\u6a19\u653e\u5230\u6587\u5b57\u6216\u662f\u5716\u7247\u4e0a\u6642\u6709 title \u6587\u5b57\u986f\u793a\u3002\uff08\u56e0\u70ba IE \u4e0d\u6a19\u6e96\uff09\u5728 IE \u700f\u89bd\u5668\u4e2d alt \u8d77\u5230\u4e86 title \u7684\u4f5c\u7528\uff0c\u8b8a\u6210\u6587\u5b57\u63d0\u793a\u3002<br>\u5728\u5b9a\u7fa9 img \u5c0d\u8c61\u6642\uff0c\u5c07 alt \u548c title \u5c6c\u6027\u5beb\u5168\uff0c\u53ef\u4ee5\u4fdd\u8b49\u5728\u5404\u7a2e\u700f\u89bd\u5668\u4e2d\u90fd\u80fd\u6b63\u5e38\u4f7f\u7528\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2CSS_%E7%9A%84%E7%9B%92%E5%AD%90%E6%A8%A1%E5%9E%8B%E7%B5%84%E6%88%90%EF%BC%9F\"><\/span>2.CSS \u7684\u76d2\u5b50\u6a21\u578b\u7d44\u6210\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u6709\u5169\u7a2e\uff0c IE \u76d2\u5b50\u6a21\u578b\u3001W3C \u76d2\u5b50\u6a21\u578b\uff1b<br>\u76d2\u6a21\u578b\uff1a \u5167\u5bb9(content)\u3001\u586b\u5145(padding)\u3001\u908a\u754c(margin)\u3001 \u908a\u6846(border)\uff1b<br>\u5340 \u5225\uff1a IE \u7684 content \u90e8\u5206\u628a border \u548c padding \u8a08\u7b97\u4e86\u9032\u53bb;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3css_%E9%81%B8%E6%93%87%E5%99%A8%E5%84%AA%E5%85%88%E7%B4%9A%EF%BC%9F\"><\/span>3.css \u9078\u64c7\u5668\u512a\u5148\u7d1a\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>!important &gt; \u884c\u5167\u6a23\u5f0f\uff08\u6bd4\u91cd1000\uff09&gt; ID \u9078\u64c7\u5668\uff08\u6bd4\u91cd100\uff09 &gt; \u985e\u9078\u64c7\u5668\uff08\u6bd4\u91cd10\uff09 &gt; \u6a19\u7c64\uff08\u6bd4\u91cd1\uff09 &gt; \u901a\u914d\u7b26 &gt; \u7e7c\u627f &gt; \u700f\u89bd\u5668\u9ed8\u8a8d\u5c6c\u6027<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4%E5%9E%82%E7%9B%B4%E6%B0%B4%E5%B9%B3%E5%B1%85%E4%B8%AD%E5%B9%BE%E7%A8%AE%E6%96%B9%E5%BC%8F%EF%BC%9F\"><\/span>4.\u5782\u76f4\u6c34\u5e73\u5c45\u4e2d\u5e7e\u7a2e\u65b9\u5f0f\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u55ae\u884c\u6587\u672c: line-height = height<br>\u5716\u7247: vertical-align: middle;<br>absolute \u5b9a\u4f4d: top: 50%;left: 50%;transform: translate(-50%, -50%);<br>flex: display:flex;margin:auto<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5position%E7%9A%84%E5%80%BC%EF%BC%8C_relative%E5%92%8Cabsolute%E5%88%86%E5%88%A5%E6%98%AF%E7%9B%B8%E5%B0%8D%E6%96%BC%E8%AA%B0%E9%80%B2%E8%A1%8C%E5%AE%9A%E4%BD%8D%E7%9A%84%EF%BC%9F\"><\/span>5.position\u7684\u503c\uff0c relative\u548cabsolute\u5206\u5225\u662f\u76f8\u5c0d\u65bc\u8ab0\u9032\u884c\u5b9a\u4f4d\u7684\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>relative:\u76f8\u5c0d\u5b9a\u4f4d\uff0c\u76f8\u5c0d\u65bc\u81ea\u5df1\u672c\u8eab\u5728\u6b63\u5e38\u6587\u6a94\u6d41\u4e2d\u7684\u4f4d\u7f6e\u9032\u884c\u5b9a\u4f4d\u3002<br>absolute:\u751f\u6210\u7d55\u5c0d\u5b9a\u4f4d\uff0c\u76f8\u5c0d\u65bc\u6700\u8fd1\u4e00\u7d1a\u5b9a\u4f4d\u4e0d\u70bastatic\u7684\u7236\u5143\u7d20\u9032\u884c\u5b9a\u4f4d\u3002<br>fixed: \uff08\u8001\u7248\u672cIE\u4e0d\u652f\u6301\uff09\u751f\u6210\u7d55\u5c0d\u5b9a\u4f4d\uff0c\u76f8\u5c0d\u65bc\u700f\u89bd\u5668\u7a97\u53e3\u6216\u8005frame\u9032\u884c\u5b9a\u4f4d\u3002<br>static:\u9ed8\u8a8d\u503c\uff0c\u6c92\u6709\u5b9a\u4f4d\uff0c\u5143\u7d20\u51fa\u73fe\u5728\u6b63\u5e38\u7684\u6587\u6a94\u6d41\u4e2d\u3002<br>sticky:\u751f\u6210\u7c98\u6027\u5b9a\u4f4d\u7684\u5143\u7d20\uff0c\u5bb9\u5668\u7684\u4f4d\u7f6e\u6839\u64da\u6b63\u5e38\u6587\u6a94\u6d41\u8a08\u7b97\u5f97\u51fa\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"6JS_%E6%95%B8%E6%93%9A%E9%A1%9E%E5%9E%8B%E6%9C%89%E5%93%AA%E4%BA%9B\"><\/span>6.JS \u6578\u64da\u985e\u578b\u6709\u54ea\u4e9b ?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u6578\u64da\u985e\u578b\u4e3b\u8981\u5305\u62ec\u5169\u90e8\u5206\uff1a<br>\u57fa\u672c\u6578\u64da\u985e\u578b\uff1a Undefined\u3001Null\u3001Boolean\u3001Number \u548c String<br>\u5f15\u7528\u6578\u64da\u985e\u578b\uff1a Object \u3001Function\u3001symbol<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"7%E3%80%8C_%E3%80%8D%E3%80%81%E3%80%8C_%E3%80%8D%E7%9A%84%E5%8D%80%E5%88%A5%EF%BC%9F\"><\/span>7.\u300c ===\u300d\u3001\u300c ==\u300d\u7684\u5340\u5225\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>==\uff0c\uff08\u7576\u4e14\u50c5\u7576\u5169\u500b\u904b\u7b97\u6578\u76f8\u7b49\u6642\uff0c\u5b83\u8fd4\u56de true\uff09\u5373\u4e0d\u6aa2\u67e5\u6578\u64da\u985e\u578b<br>===\uff0c\uff08\u53ea\u6709\u5728\u7121\u9700\u985e\u578b\u8f49\u63db\u904b\u7b97\u6578\u5c31\u76f8\u7b49\u7684\u60c5\u6cc1\u4e0b\uff0c\u624d\u8fd4\u56de true\uff09\u9700\u8981\u6aa2\u67e5\u6578\u64da\u985e\u578b<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"8var%E3%80%81%E3%80%90let%E3%80%81const_%E5%8D%80%E5%88%A5%EF%BC%9F\"><\/span>8.var\u3001\u3010let\u3001const \u5340\u5225\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>var \u5b58\u5728\u8b8a\u91cf\u63d0\u5347\u3002<br>let \u53ea\u80fd\u5728\u584a\u7d1a\u4f5c\u7528\u57df\u5167\u8a2a\u554f\u3002<br>const \u7528\u4f86\u5b9a\u7fa9\u5e38\u91cf\uff0c\u5fc5\u9808\u521d\u59cb\u5316\uff0c\u4e0d\u80fd\u4fee\u6539\uff08\u5c0d\u8c61\u7279\u6b8a\uff09<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"9GET%E5%92%8CPOST%E7%9A%84%E5%8D%80%E5%88%A5%EF%BC%8C%E4%BD%95%E6%99%82%E4%BD%BF%E7%94%A8POST%EF%BC%9F\"><\/span>9.GET\u548cPOST\u7684\u5340\u5225\uff0c\u4f55\u6642\u4f7f\u7528POST\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>GET\u548cPOST\u7684\u5340\u5225\uff1a<br>GET\uff1a\u4e00\u822c\u7528\u65bc\u67e5\u8a62\u6578\u64da\uff0c\u4f7f\u7528URL\u50b3\u905e\u53c3\u6578\uff0c\u901a\u904e\u8d85\u93c8\u63a5\u63d0\u4ea4\uff0c\u7531\u65bc\u700f\u89bd\u5668\u5c0d\u5730\u5740\u6b04\u9577\u5ea6\u6709\u9650\u5236\uff0c\u6240\u4ee5\u5c0d\u4f7f\u7528get\u65b9\u5f0f\u6240\u767c\u9001\u4fe1\u606f\u7684\u6578\u91cf\u6709\u9650\u5236\uff0c\u540c\u6642\u700f\u89bd\u5668\u6703\u8a18\u9304\uff08\u6b77\u53f2\u8a18\u9304\uff0c\u7de9\u5b58\uff09\u8acb\u6c42\u5730\u5740\u7684\u4fe1\u606f\uff0c\u5305\u62ec\u5730\u5740\u5f8c\u9762\u7684\u6578\u64da\u3002get \u53ea\u80fd\u767c\u9001\u666e\u901a\u683c\u5f0f\uff08URL \u7de8\u78bc\u683c\u5f0f\uff09\u7684\u6578\u64da\u3002<br>POST\uff1a\u4e00\u822c\u7528\u65bc\u5411\u670d\u52d9\u5668\u767c\u9001\u6578\u64da\uff0c\u4e3b\u8981\u901a\u904e\u8868\u55ae\u63d0\u4ea4\uff0c\u5c0d\u6240\u767c\u9001\u7684\u6578\u64da\u7684\u5927\u5c0f\u7406\u8ad6\u4e0a\u662f\u6c92\u6709\u9650\u5236\uff0c\u700f\u89bd\u5668\u6703\u7de9\u5b58\u8a18\u9304\u5730\u5740\uff0c\u4f46\u662f\u4e0d\u6703\u8a18\u9304 post \u63d0\u4ea4\u7684\u6578\u64da\u3002post \u53ef\u4ee5\u767c\u9001\u7d14\u6587\u672c\u3001URL\u7de8\u78bc\u683c\u5f0f\u3001\u4e8c\u9032\u5236\u683c\u5f0f\u7684\u5b57\u7b26\u4e32\uff0c\u5f62\u5f0f\u591a\u6a23\u3002<\/p>\n\n\n\n<p>\u5728\u4ee5\u4e0b\u60c5\u6cc1\u4e2d\uff0c\u8acb\u4f7f\u7528 POST \u8acb\u6c42\uff1a<br>\u4ee5\u63d0\u4ea4\u70ba\u76ee\u7684\u7684\u8acb\u6c42\uff08\u985e\u4f3c\u8a9e\u7fa9\u5316\uff0cget \u8868\u793a\u8acb\u6c42\uff0cpost \u8868\u793a\u63d0\u4ea4\uff09\uff1b<br>\u767c\u9001\u79c1\u5bc6\u985e\u6578\u64da\uff08\u7528\u6236\u540d\u3001\u5bc6\u78bc\uff09\uff08\u56e0\u70ba\u700f\u89bd\u5668\u7de9\u5b58\u8a18\u9304\u7279\u6027\uff09\uff1b<br>\u5411\u670d\u52d9\u5668\u767c\u9001\u5927\u91cf\u6578\u64da\uff08\u6578\u64da\u5927\u5c0f\u9650\u5236\u5340\u5225\uff09\uff1b<br>\u4e0a\u50b3\u6587\u4ef6\u5716\u7247\u6642\uff08\u6578\u64da\u985e\u578b\u5340\u5225\uff09\uff1b<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"101rem%E3%80%811em%E3%80%811vh%E3%80%811px%E5%90%84%E8%87%AA%E4%BB%A3%E8%A1%A8%E7%9A%84%E5%90%AB%E7%BE%A9%EF%BC%9F\"><\/span>10.1rem\u30011em\u30011vh\u30011px\u5404\u81ea\u4ee3\u8868\u7684\u542b\u7fa9\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>rem \u662f\u5168\u90e8\u7684\u9577\u5ea6\u90fd\u76f8\u5c0d\u65bc\u6839\u5143\u7d20\u5143\u7d20\u3002\u901a\u5e38\u505a\u6cd5\u662f\u7d66html\u5143\u7d20\u8a2d\u7f6e\u4e00\u500b\u5b57\u9ad4\u5927\u5c0f\uff0c\u7136\u5f8c\u5176\u4ed6\u5143\u7d20\u7684\u9577\u5ea6\u55ae\u4f4d\u5c31\u70barem\u3002<\/p>\n\n\n\n<p>em \u5b50\u5143\u7d20\u5b57\u9ad4\u5927\u5c0f\u7684em\u662f\u76f8\u5c0d\u65bc\u7236\u5143\u7d20\u5b57\u9ad4\u5927\u5c0f,\u5143\u7d20\u7684width\/height\/padding\/margin\u7528em\u7684\u8a71\u662f\u76f8\u5c0d\u65bc\u8a72\u5143\u7d20\u7684font-size<\/p>\n\n\n\n<p>vw\/vh \u5168\u7a31\u662f Viewport Width \u548c Viewport Height\uff0c\u8996\u7a97\u7684\u5bec\u5ea6\u548c\u9ad8\u5ea6\uff0c\u76f8\u7576\u65bc \u5c4f\u5e55\u5bec\u5ea6\u548c\u9ad8\u5ea6\u7684 1%\uff0c\u4e0d\u904e\uff0c\u8655\u7406\u5bec\u5ea6\u7684\u6642\u5019%\u55ae\u4f4d\u66f4\u5408\u9069\uff0c\u8655\u7406\u9ad8\u5ea6\u7684 \u8a71 vh \u55ae\u4f4d\u66f4\u597d\u3002<\/p>\n\n\n\n<p>px\u50cf\u7d20\uff08Pixel\uff09\u3002\u76f8\u5c0d\u9577\u5ea6\u55ae\u4f4d\u3002\u50cf\u7d20px\u662f\u76f8\u5c0d\u65bc\u986f\u793a\u5668\u5c4f\u5e55\u5206\u8fa8\u7387\u800c\u8a00\u7684\u3002<\/p>\n\n\n\n<p>\u4e00\u822c\u96fb\u8166\u7684\u5206\u8fa8\u7387\u6709{1920&#215;1024}\u7b49\u4e0d\u540c\u7684\u5206\u8fa8\u7387<br>1920&#215;1024 \u524d\u8005\u662f\u5c4f\u5e55\u5bec\u5ea6\u7e3d\u5171\u67091920\u500b\u50cf\u7d20,\u5f8c\u8005\u5247\u662f\u9ad8\u5ea6\u70ba1024\u500b\u50cf\u7d20<\/p>\n","protected":false},"excerpt":{"rendered":"<p>1.\u6a19\u7c64\u4e0a title \u8207 alt \u5c6c\u6027\u7684\u5340\u5225\u662f\u4ec0\u9ebc\uff1f alt \u662f\u7d66\u641c\u7d22\u5f15\u64ce\u8b58\u5225\uff0c\u5728\u5716\u50cf\u7121\u6cd5\u986f\u793a\u6642\u7684\u66ff\u4ee3\u6587\u672c\uff1btitle 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\u8a08\u7b97\u4e86\u9032\u53bb; 3.css \u9078\u64c7\u5668\u512a\u5148\u7d1a\uff1f !important &gt; \u884c\u5167\u6a23\u5f0f\uff08\u6bd4\u91cd1000\uff09&gt; ID \u9078\u64c7\u5668\uff08\u6bd4\u91cd100\uff09 &gt; \u985e\u9078\u64c7\u5668\uff08\u6bd4\u91cd10\uff09 &gt; \u6a19\u7c64\uff08\u6bd4\u91cd1\uff09 &gt; \u901a\u914d\u7b26 &gt; [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-31091","post","type-post","status-publish","format-standard","hentry","category-web-design"],"_links":{"self":[{"href":"https:\/\/web4theme.com\/index.php?rest_route=\/wp\/v2\/posts\/31091","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/web4theme.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/web4theme.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/web4theme.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/web4theme.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=31091"}],"version-history":[{"count":1,"href":"https:\/\/web4theme.com\/index.php?rest_route=\/wp\/v2\/posts\/31091\/revisions"}],"predecessor-version":[{"id":31092,"href":"https:\/\/web4theme.com\/index.php?rest_route=\/wp\/v2\/posts\/31091\/revisions\/31092"}],"wp:attachment":[{"href":"https:\/\/web4theme.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=31091"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/web4theme.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=31091"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/web4theme.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=31091"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}