{"id":11144,"date":"2024-03-31T20:06:28","date_gmt":"2024-03-31T12:06:28","guid":{"rendered":"https:\/\/www.zhangxinxu.com\/wordpress\/?p=11144"},"modified":"2024-03-31T20:06:28","modified_gmt":"2024-03-31T12:06:28","slug":"css-nesting-scope-rules","status":"publish","type":"post","link":"https:\/\/www.zhangxinxu.com\/wordpress\/2024\/03\/css-nesting-scope-rules\/","title":{"rendered":"CSS Nesting\u5d4c\u5957\u4e0e@scope\u89c4\u5219\u4e5f\u592a\u96f7\u540c\u4e86\u5427\uff1f"},"content":{"rendered":"<p>by <a href=\"https:\/\/www.zhangxinxu.com\/\">zhangxinxu<\/a> from <a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/?p=11144\">https:\/\/www.zhangxinxu.com\/wordpress\/?p=11144<\/a> \u946b\u7a7a\u95f4-\u946b\u751f\u6d3b<br \/>\n\u672c\u6587\u6b22\u8fce\u5206\u4eab\u4e0e\u805a\u5408\uff0c\u5168\u6587\u8f6c\u8f7d\u5c31\u4e0d\u5fc5\u4e86\uff0c\u5c0a\u91cd\u7248\u6743\uff0c\u5708\u5b50\u5c31\u8fd9\u4e48\u5927\uff0c\u82e5\u6025\u7528\u53ef\u4ee5\u8054\u7cfb\u6388\u6743\u3002<\/p>\n<p><script>window.wxShareImgUrl = 'https:\/\/www.zhangxinxu.com\/study\/image\/share\/202403-scope-nesting.png';<\/script><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202403\/scope-nesting-cover.png\" width=\"480\" height=\"302\" alt=\"\u5c01\u9762\u5360\u4f4d\u56fe\" class=\"alignright size-medium clip thumb\" \/><\/p>\n<h3>\u4e00\u3001\u5c45\u7136\u8fd8\u6709\u4e2aCSS\u5d4c\u5957<\/h3>\n<p>\u5e74\u524d\u6709\u4ecb\u7ecd<a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/2024\/01\/css-at-scope\/\">CSS @scope\u89c4\u5219<\/a>\uff0c\u53ef\u4ee5\u5b9e\u73b0CSS\u7684\u9009\u62e9\u5668\u5185\u5916\u5d4c\u5957\uff0c\u7b80\u5316\u9009\u62e9\u5668\u7684\u4e66\u5199\uff1a<\/p>\n<pre>@scope(nav) {\r\n  ul {\r\n    list-style: none;\r\n    padding: 0;margin: 0;\r\n  }\r\n  li {\r\n    display: inline-block;\r\n  }\r\n  a {\r\n    display: block;\r\n    padding: 6px 12px;\r\n    text-decoration: none;\r\n    background: skyblue;\r\n  }\r\n}<\/pre>\n<p>\u6700\u8fd1\u53d1\u73b0\uff0c\u51e0\u4e4e\u540c\u4e00\u65f6\u95f4\uff0c\u73b0\u4ee3\u6d4f\u89c8\u5668\u8fd8\u652f\u6301\u4e86\u4e13\u95e8\u7528\u6765\u5d4c\u5957\u4e66\u5199\u7684CSS Nesting\u8bed\u6cd5\uff0c\u501f\u9274\u81eaSass\/Less\/Stylus\u7b49\u9884\u7f16\u8bd1\u8bed\u8a00\u3002<\/p>\n<p>\u4f7f\u7528\u793a\u610f\uff1a<\/p>\n<pre>nav {\r\n  ul {\r\n    list-style: none;\r\n    padding: 0; margin: 0;\r\n  }\r\n  li {\r\n    display: inline-block;\r\n  }\r\n  a {\r\n    display: block;\r\n    padding: 6px 12px;\r\n    text-decoration: none;\r\n    background: skyblue;\r\n  }\r\n}<\/pre>\n<p>\u53ef\u4ee5\u770b\u5230\u548c@scope(nav)\u7684\u8bed\u6cd5\u6781\u4e3a\u76f8\u4f3c\uff0c\u6240\u5b9e\u73b0\u7684\u6548\u679c\u4e5f\u662f\u4e00\u6837\u7684\uff0c\u5047\u8bbe\u6709\u5982\u4e0b\u6240\u793a\u7684HTML\u4ee3\u7801\uff1a<\/p>\n<pre>&lt;nav&gt;\r\n  &lt;ul&gt;\r\n    &lt;li&gt;&lt;a href=\"\"&gt;\u94fe\u63a51&lt;\/a&gt;&lt;\/li&gt;\r\n    &lt;li&gt;&lt;a href=\"\"&gt;\u94fe\u63a52&lt;\/a&gt;&lt;\/li&gt;\r\n    &lt;li&gt;&lt;a href=\"\"&gt;\u94fe\u63a53&lt;\/a&gt;&lt;\/li&gt;\r\n  &lt;\/ul&gt;\r\n&lt;\/nav&gt;\r\n&lt;p&gt;&lt;a&gt;\u6211\u5462\uff1f&lt;\/a&gt;&lt;\/p&gt;<\/pre>\n<p>\u53ef\u4ee5\u770b\u5230\uff0cnav\u5143\u7d20\u5185\u7684\u94fe\u63a5\u6709\u80cc\u666f\u8272\u7b49\u6837\u5f0f\uff0c\u5916\u90e8\u7684a\u5143\u7d20\u5219\u4f9d\u7136\u662f\u9ed8\u8ba4\u6837\u5f0f\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202403\/2024-03-27_224542.png\" width=\"253\" height=\"105\" alt=\"\u5d4c\u5957\u6837\u5f0f\u6e32\u67d3\u6548\u679c\" class=\"alignnone size-medium\" \/><\/p>\n<p>\u5e76\u4e14\u4e24\u79cd\u5199\u6cd5\u7684\u9009\u62e9\u5668\u7684\u4f18\u5148\u7ea7\u4e5f\u662f\u4e00\u6837\u7684\u3002<\/p>\n<p>\u4ee5a\u5143\u7d20\u4e3a\u8bf4\u660e\u5bf9\u8c61\uff0c\u4e24\u79cd\u5199\u6cd5\u7684\u9009\u62e9\u5668\u4f18\u5148\u7ea7\u5747\u7b49\u540c\u4e8e <code>nav a<\/code>\u3002<\/p>\n<p>\u8fd9\u5c31\u8ba9\u6211\u9677\u5165\u4e86\u6df1\u6df1\u7684\u6c89\u601d\u2026\u2026\u4e3a\u4ec0\u4e48\u8981\u5f04\u4e24\u5957\u89c4\u5219\u5982\u6b64\u76f8\u4f3c\u7684\u4e1c\u897f\u5462\uff1f<\/p>\n<p><video src='\/\/image.zhangxinxu.com\/video\/blog\/202403\/think.mp4' type=\"video\/mp4\" width=\"160\" height=\"164\" preload=\"auto\" muted autoplay autobuffer loop x-webkit-airplay=\"allow\" x5-video-player-type=\"h5\" x5-video-player-fullscreen=\"true\" x5-video-orientation=\"portraint\" webkit-playsinline=\"true\" playsinline=\"true\" \u200b\u200b\u200b\u200bposter=\"\/\/image.zhangxinxu.com\/image\/blog\/201806\/poster.png\"><\/video><\/p>\n<h3>\u4e8c\u3001@scope\u548cNesting\u7684\u4e0d\u540c<\/h3>\n<p>\u5728\u6211\u770b\u6765\uff0cCSS Nesting\u5c31\u662f\u7eaf\u7cb9\u7684\u8bed\u6cd5\u7cd6\uff0c\u4e5f\u5c31\u662f\u5c31\u662f\u7eaf\u7cb9\u7684\u8bed\u6cd5\u4e0a\u7684\u53d8\u5316\uff0c\u672c\u8eab\u5e76\u4e0d\u5177\u5907\u4efb\u4f55\u65b0\u7684\u7279\u6027\u3002<\/p>\n<p>@scope\u5219\u4e0d\u4e00\u6837\uff0c@scope\u89c4\u5219\u4e2d\u60f3\u8981\u751f\u6548\u7684\u9009\u62e9\u5668\uff0c\u4e00\u5b9a\u5c5e\u4e8e@scope\u7684\u5b50\u5143\u7d20\uff0c\u5e26\u6709\u201c\u5c40\u90e8\u4e0a\u4e0b\u6587\u201d\u7684\u6027\u8d28\u5728\u91cc\u9762\u3002<\/p>\n<p>\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e00\u4e2a\u4f8b\u5b50\u611f\u53d7\u4e0b\u4e24\u8005\u7684\u4e0d\u540c\u3002<\/p>\n<p>\u5047\u8bbe\u6709\u4e24\u4e2a\u65e0\u9700\u5217\u8868<code>&lt;ul&gt;<\/code>\u5143\u7d20\uff1a<\/p>\n<pre>&lt;ul&gt;\r\n  &lt;li&gt;\u5217\u88681&lt;\/li&gt;\r\n  &lt;li&gt;\u5217\u88682&lt;\/li&gt;\r\n  &lt;li&gt;\u5217\u88683&lt;\/li&gt;\r\n&lt;\/ul&gt;\r\n&lt;ul&gt;\r\n  &lt;li&gt;\u5217\u88682-1&lt;\/li&gt;\r\n  &lt;li&gt;\u5217\u88682-2&lt;\/li&gt;\r\n  &lt;li&gt;\u5217\u88682-3&lt;\/li&gt;\r\n&lt;\/ul&gt;<\/pre>\n<p>\u90a3\u4e48\uff0c@scope\u89c4\u5219\u4e2d\u4f7f\u7528:scope\u4f2a\u7c7b\uff08\u8868\u793aul\u5143\u7d20\u81ea\u8eab\uff09\u548c\u5144\u5f1f\u9009\u62e9\u5668\uff0c\u662f\u65e0\u6cd5\u5339\u914d\u540e\u9762\u7684ul\u5143\u7d20\u7684\u3002<\/p>\n<pre>@scope(ul) {\r\n  :scope + ul {\r\n    color: red;\r\n    font-weight: bold;\r\n  }\r\n}<\/pre>\n<p>\u6b64\u65f6\uff0c\u6240\u6709\u7684\u5217\u8868\u6587\u5b57\u6837\u5f0f\u90fd\u662f\u9ed8\u8ba4\u72b6\u6001\uff0c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202403\/2024-03-28_232932.png\" width=\"109\" height=\"144\" alt=\"\u5217\u8868\u6837\u5f0f\u6548\u679c\" class=\"alignnone size-medium\" \/><\/p>\n<p>\u4f46\u82e5\u662f\u6362\u6210CSS\u5d4c\u5957\u5199\u6cd5\uff08\u4f7f\u7528<code>&amp;<\/code>\u7b26\u53f7\u8868\u793a\u7956\u5148\u9009\u62e9\u5668\uff09\uff1a<\/p>\n<pre>ul {\r\n  &amp; + ul {\r\n    color: red;\r\n    font-weight: bold;\r\n  }\r\n}<\/pre>\n<p>\u5219\u53ef\u4ee5\u770b\u5230\u540e\u9762\u4e00\u4e2a<code>&lt;ul&gt;<\/code>\u5217\u8868\u7684\u6587\u5b57\u5747\u662f\u7ea2\u8272\u52a0\u7c97\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202403\/2024-03-28_233325.png\" width=\"126\" height=\"160\" alt=\"\u7ea2\u8272\u52a0\u7c97\" class=\"alignnone size-medium\" \/><\/p>\n<p>\u7531\u4e8eCSS Nesting\u8bed\u6cd5\u4e2d\u7684<code>&amp;<\/code>\u7b26\u53f7\u5c31\u662f\u7eaf\u7cb9\u7684\u9009\u62e9\u5668\u66ff\u4ee3\uff0c\u56e0\u6b64\uff0c\u4e0a\u9762\u7684CSS\u5199\u4f5c\u8fd9\u6837\u6548\u679c\u4e5f\u662f\u4e00\u6837\u7684\uff1a<\/p>\n<pre>ul {\r\n  &amp; + &amp; {\r\n    color: red;\r\n    font-weight: bold;\r\n  }\r\n}<\/pre>\n<h4>\u533a\u522b2\uff1a\u5b8c\u6574CSS\u89c4\u5219\u548c\u968f\u610f\u5d4c\u5957<\/h4>\n<p>\u5982\u679c\u4f7f\u7528@scope\u8bed\u6cd5\uff0c\u90a3\u4e48\uff0c\u89c4\u5219\u4e2d\u7684\u6bcf\u4e00\u884c\u4ee3\u7801\uff0c\u90fd\u5e94\u8be5\u5c5e\u4e8e\u4e00\u4e2a\u5b8c\u6574\u7684\u89c4\u5219\uff0c\u800c\u4e0d\u80fd\u662f\u67d0\u4e00\u6761\u5355\u72ec\u7684CSS\u58f0\u660e\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u4e0b\u9762\u7684\u5199\u6cd5\u4f1a\u8ba9\u6574\u6bb5CSS\u89c4\u5219\u65e0\u6548\uff1a<\/p>\n<pre>@scope(ul) {\r\n  border: 1px solid;  \r\n\r\n  li {\r\n    color: red;\r\n    font-weight: bold;\r\n  }\r\n}<\/pre>\n<p>\u4f46\u662fCSS\u539f\u751f\u7684\u5d4c\u5957\u8bed\u6cd5\u90fd\u6ca1\u6709\u6b64\u987e\u8651\uff0c\u76f4\u63a5\u4e0a\uff1a<\/p>\n<pre>ul {\r\n  border: 1px solid;  \r\n\r\n  li {\r\n    color: red;\r\n  }\r\n}<\/pre>\n<p>\u53ef\u4ee5\u5f97\u5230\u5982\u4e0b\u622a\u56fe\u6240\u793a\u6548\u679c\uff0c\u5217\u8868\u6709\u8fb9\u6846\uff0c\u6587\u5b57\u662f\u7ea2\u8272\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202403\/2024-03-28_234524.png\" width=\"291\" height=\"143\" alt=\"\u5217\u8868\u8fb9\u6846\u548c\u989c\u8272\" class=\"alignnone size-medium\" \/><\/p>\n<h3>\u4e09\u3001\u4e0d\u540c\u89c4\u5219\u89c1\u7684\u76f8\u4e92\u5d4c\u5957\uff1f<\/h3>\n<p>\u9996\u5148\uff0cCSS @scope\u8303\u56f4\u548cCSS Nesting\u5d4c\u5957\u662f\u53ef\u4ee5\u540c\u65f6\u4f7f\u7528\u7684\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre>@scope(body) {\r\n  ul {\r\n    border: 1px solid;\r\n    li {\r\n      color: red;\r\n    }\r\n  }\r\n}<\/pre>\n<p>\u540c\u6837\u53ef\u4ee5\u8ba9\u5217\u8868\u51fa\u73b0\u8fb9\u6846\uff0c\u5185\u5bb9\u989c\u8272\u662f\u7ea2\u8272\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202403\/2024-03-28_234524.png\" width=\"291\" height=\"143\" alt=\"\u5217\u8868\u8fb9\u6846\u548c\u989c\u8272\" class=\"alignnone size-medium\" \/><\/p>\n<p>\u4e24\u79cd\u7279\u6027\u90fd\u652f\u6301\u548c\u5176\u4ed6@\u89c4\u5219\u4e92\u76f8\u5d4c\u5957\u3002<\/p>\n<p>CSS @scope\u8303\u56f4\u53ef\u4ee5\u5d4c\u5957\u5176\u4ed6@scope\u8303\u56f4\uff0c\u4f8b\u5982\u4e0b\u9762\u7684\u5199\u6cd5\u662f\u5408\u6cd5\u7684\uff1a<\/p>\n<pre>@scope(body) {\r\n  ul {\r\n    border: 1px solid;\r\n  }\r\n\r\n  @scope(li) {\r\n    :scope {\r\n      color: red;\r\n    }\r\n  }\r\n}<\/pre>\n<p>\u4e5f\u652f\u6301\u548c@media\u5a92\u4f53\u67e5\u8be2\u4e00\u8d77\u4f7f\u7528\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre>@scope(ul) {\r\n  :scope {\r\n    border: 1px solid;\r\n  }\r\n\r\n  @media(width &lt; 640px) {\r\n    li {\r\n      color: red;\r\n    }\r\n  }\r\n}<\/pre>\n<p>\u548c\u8fd9\u6bb5\u4ee3\u7801\uff1a<\/p>\n<pre>ul {\r\n  & {\r\n    border: 1px solid;\r\n  }\r\n\r\n  @media(width &lt; 640px) {\r\n    li {\r\n      color: red;\r\n    }\r\n  }\r\n}<\/pre>\n<p>\u5747\u53ef\u4ee5\u5728\u7a84\u5c4f\u4e0b\u8ba9\u5217\u8868\u6587\u5b57\u989c\u8272\u7ea2\u8272\uff0c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202403\/2024-03-28_234524.png\" width=\"291\" height=\"143\" alt=\"\u5217\u8868\u8fb9\u6846\u548c\u989c\u8272\" class=\"alignnone size-medium\" \/><\/p>\n<h3>\u56db\u3001\u7a76\u7adf\u4ec0\u4e48\u65f6\u5019\u7528\u54ea\u4e2a\uff1f<\/h3>\n<p>\u4ec0\u4e48\u65f6\u5019\u7528\u8303\u56f4\uff0c\u4ec0\u4e48\u4f7f\u7528\u7528\u5d4c\u5957\u5462\uff1f<\/p>\n<p>\u6211\u7422\u78e8\u4e86\u4e0b\uff0c\u4f3c\u4e4e\u7edd\u5927\u591a\u6570\u573a\u666f\u4e24\u8005\u662f\u53ef\u4ee5\u968f\u610f\u66ff\u6362\u7684\u3002<\/p>\n<p>\u601d\u6765\u60f3\u53bb\uff0c\u603b\u611f\u89c9\u6700\u5927\u7684\u533a\u522b\u53cd\u800c\u662f\u8bed\u4e49\u4e0a\u7684\u533a\u522b\u3002<\/p>\n<p>\u4f60\u5982\u679c\u4ec5\u4ec5\u662f\u60f3\u8ba9\u4e66\u5199\u66f4\u52a0\u7b80\u6d01\uff0c\u4ee3\u7801\u66f4\u52a0\u88c5\u903c\uff0c\u4f7f\u7528\u5d4c\u5957\u3002<\/p>\n<p>\u5982\u679c\u662f\u5355\u72ec\u7684\u67d0\u4e2a\u7ec4\u4ef6\u7684\u5f00\u53d1\uff0c\u4f7f\u7528\u8303\u56f4\u3002<\/p>\n<p>\u8fd9\u4e48\u4e00\u60f3\uff0c\u5fc3\u91cc\u8212\u670d\u591a\u4e86\u3002<\/p>\n<p>\u597d\u4e86\uff0c\u5c31\u626f\u8fd9\u4e48\u591a\u5427\uff0c\u5982\u679c\u4f60\u6709\u5176\u4ed6\u60f3\u6cd5\uff0c\u6b22\u8fce\u8bc4\u8bba\u4ea4\u6d41\u3002<\/p>\n<p>???<\/p>\n<p>\u672c\u6587\u4e3a\u539f\u521b\u6587\u7ae0\uff0c\u6b22\u8fce\u5206\u4eab\uff0c\u52ff\u5168\u6587\u8f6c\u8f7d\uff0c\u5982\u679c\u5b9e\u5728\u559c\u6b22\uff0c\u53ef\u6536\u85cf\uff0c\u6c38\u4e0d\u8fc7\u671f\uff0c\u4e14\u4f1a\u53ca\u65f6\u66f4\u65b0\u77e5\u8bc6\u70b9\u53ca\u4fee\u6b63\u9519\u8bef\uff0c\u9605\u8bfb\u4f53\u9a8c\u4e5f\u66f4\u597d\u3002<br \/>\n\u672c\u6587\u5730\u5740\uff1a<a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/?p=11144\">https:\/\/www.zhangxinxu.com\/wordpress\/?p=11144<\/a><\/p>\n<p>\uff08\u672c\u7bc7\u5b8c\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202403\/scope-nesting-cover.png\" width=\"160\" height=\"101\" alt=\"\u5c01\u9762\u5360\u4f4d\u56fe\" class=\"alignright size-medium\" loading=\"lazy\" \/><\/p>\n<p>\u65e2\u751f\u745c\u4f55\u751f\u4eae\uff0c\u6ca1\u60f3\u5230CSS\u6709\u8bed\u6cd5\u548c\u4f5c\u7528\u5982\u6b64\u76f8\u4f3c\u7684\u4e24\u5957\u89c4\u5219\uff0c\u4e00\u4e2a\u662f\u8303\u56f4\uff0c\u4e00\u4e2a\u662f\u5d4c\u5957\uff0c\u5927\u90e8\u5206\u65f6\u5019\u4e24\u8005\u53ef\u4ee5\u4e92\u76f8\u66ff\u6362\uff0c\u600e\u4f1a\u5982\u6b64\u5462\uff1f<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[1024,1015,1957,212],"_links":{"self":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/11144"}],"collection":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/comments?post=11144"}],"version-history":[{"count":0,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/11144\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/media?parent=11144"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/categories?post=11144"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/tags?post=11144"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}