{"id":8305,"date":"2018-12-22T23:10:15","date_gmt":"2018-12-22T15:10:15","guid":{"rendered":"https:\/\/www.zhangxinxu.com\/wordpress\/?p=8305"},"modified":"2019-12-27T20:30:16","modified_gmt":"2019-12-27T12:30:16","slug":"css-backdrop-pseudo-element","status":"publish","type":"post","link":"https:\/\/www.zhangxinxu.com\/wordpress\/2018\/12\/css-backdrop-pseudo-element\/","title":{"rendered":"CSS ::backdrop\u4f2a\u5143\u7d20\u662f\u5e72\u561b\u7528\u7684\uff1f"},"content":{"rendered":"

by zhangxinxu<\/a> from https:\/\/www.zhangxinxu.com\/wordpress\/?p=8305<\/a>
\n\u672c\u6587\u53ef\u5168\u6587\u8f6c\u8f7d\uff0c\u4e2a\u4eba\u7f51\u7ad9\u65e0\u9700\u6388\u6743\uff0c\u53ea\u8981\u4fdd\u7559\u539f\u4f5c\u8005\u3001\u51fa\u5904\u4ee5\u53ca\u6587\u4e2d\u94fe\u63a5\u5373\u53ef\uff0c\u4efb\u4f55\u7f51\u7ad9\u5747\u53ef\u6458\u8981\u805a\u5408\uff0c\u5546\u7528\u8bf7\u8054\u7cfb\u6388\u6743\u3002<\/p>\n

\"backdrop\u5934\u56fe\"<\/p>\n

\u4e00\u3001\u5148\u5feb\u901f\u4e86\u89e3::backdrop\u4f2a\u5143\u7d20<\/h3>\n

backdrop\u8fd9\u4e2a\u5355\u8bcd\u662f\u80cc\u666f\u5e55\u5e03\uff0c\u5c31\u662f\u620f\u66f2\u8868\u6f14\u540e\u9762\u7684\u4e00\u5757\u5e03\u3002<\/p>\n

\"\u80cc\u666f\u5e55\u5e03\"<\/p>\n

::backdrop<\/code>\u4f2a\u5143\u7d20\u5c31\u662f\u63a7\u5236\u9700\u8981\u89c6\u89c9\u805a\u7126\u7684\u5143\u7d20\u540e\u9762\u7684\u80cc\u666f\u5143\u7d20\u6837\u5f0f\u7684\u3002<\/p>\n

\u5728web\u4e2d\u54ea\u4e9b\u5143\u7d20\u9700\u8981\u89c6\u89c9\u805a\u7126\u5462\uff1f\u4e00\u4e2a\u662fHTML5 <video><\/code>\u89c6\u9891\u5143\u7d20\uff0c\u8fd8\u6709\u5c31\u662fHTMl5.2 <dialog><\/code>\u5143\u7d20\uff0c\u4ee5\u53ca\u5904\u4e8e\u5168\u5c4f\u72b6\u6001\u4e0b\u7684\u666e\u901a\u5143\u7d20\u3002<\/p>\n

\u4e0b\u9762\u5206\u522b\u770b\u4e0b::backdrop<\/code>\u4f2a\u5143\u7d20\u5728\u4e0a\u8ff0\u8fd9\u4e9bHTML\u5143\u7d20\u548c\u573a\u666f\u4e2d\u7684\u8868\u73b0\u5427\u3002<\/p>\n

\u4e8c\u3001video\u5143\u7d20\u4e2d\u7684::backdrop<\/h3>\n

video\u5143\u7d20\u4e2d\u7684::backdrop\u4f2a\u5143\u7d20\u53ef\u4ee5\u63a7\u5236\u5168\u5c4f\u65f6\u5019\u89c6\u9891\u540e\u9762\u5c42\u7684\u6837\u5f0f\uff0c\u9ed8\u8ba4\u662f\u7eaf\u9ed1\u8272\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6ebackground\u76f8\u5173\u5c5e\u6027\uff0c\u628a\u5168\u5c4f\u64ad\u653e\u7684\u89c6\u9891\u7684\u5e55\u5e03\u80cc\u666f\u6539\u6210\u8bbe\u8ba1\u5e08\u773c\u4e2d\u7684\u900f\u660e\u8272\u3002<\/p>\n

\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n

\/* \u7ed9\u5168\u5c4f\u65f6\u5019\u89c6\u9891\u80cc\u666f\u52a0\u4e2a\u900f\u660e *\/<\/span>\r\nvideo::backdrop {\r\n    background-color: #fff;\r\n    background-image: linear-gradient(45deg, #eee 25%, transparent 25%, transparent 75%, #eee 75%, #eee), linear-gradient(45deg, #eee 25%, transparent 25%, transparent 75%, #eee 75%, #eee);\r\n    background-size: 16px 16px;\r\n    background-position: 0 0, 8px 8px;\r\n}<\/pre>\n
\u7ed3\u679c\u5982\u4e0b\u622a\u56fe\uff1a<\/p>\n
\"\u5168\u5c4f\u89c6\u9891\u80cc\u666f\u900f\u660e\u4e86\"<\/p>\n
\u773c\u89c1\u4e3a\u5b9e\uff0c\u60a8\u53ef\u4ee5\u72e0\u72e0\u5730\u70b9\u51fb\u8fd9\u91cc\uff1a::backdrop\u4f2a\u5143\u7d20\u63a7\u5236video\u7684\u80cc\u666fdemo<\/a><\/p>\n
\/\/zxx: \u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u539f\u89c6\u9891\u6bd4\u4f8b16:9\uff0c\u82e5\u4f60\u7684\u663e\u793a\u5668\u4e5f\u662f16:9\uff0c\u5219\u4e0d\u4f1a\u663e\u793a\u5e55\u5e03\u80cc\u666f\uff0c\u6b64\u65f6\uff0c\u53ef\u4ee5F12\u6253\u5f00\u5f00\u53d1\u8005\u5de5\u5177\u63a7\u5236\u53f0\u518d\u5168\u5c4f\u3002<\/span><\/p>\n
\u5982\u679c\u60f3\u8981\u89c6\u9891\u7684\u5168\u5c4f\u80cc\u666f\u771f\u00b7\u7528\u6237\u89c6\u89c9\u4e0d\u53ef\u89c1\uff0c\u4e0b\u97623\u79cd\u58f0\u660e\u90fd\u662f\u53ef\u4ee5\u7684\u3002<\/p>\n
video::backdrop { opacity: 0; }<\/pre>\n
video::backdrop { visibility: hidden; }<\/pre>\n
video::backdrop { display: none; }<\/pre>\n
\u4e09\u3001dialog\u5143\u7d20\u4e2d\u7684::backdrop<\/h3>\n
\u5f53\u6211\u4eec\u4f7f\u7528dialog\u5143\u7d20\u5185\u7f6e\u7684showModal()<\/code>\u663e\u793a\u5e26\u80cc\u666f\u8272\u7684\u5f39\u6846\u65f6\u5019\uff0c\u9ed8\u8ba4\u8272\u9ed1\u8272\u534a\u900f\u660e\uff0c\u5728\u6211\u73b0\u5728\u4f7f\u7528\u7684Chrome\u6d4f\u89c8\u5668\u4e0b\u662frgba(0, 0, 0, 0.1);<\/code>\u3002<\/p>\n
\"\u9ed8\u8ba4\u5f39\u6846\u534a\u900f\u660e\u80cc\u666f\u8986\u76d6\u6548\u679c\"<\/p>\n
\u6211\u4eec\u53ef\u4ee5\u501f\u52a9::backdrop\u4f2a\u5143\u7d20\u6539\u53d8\u5f39\u6846\u7684\u5e55\u5e03\u80cc\u666f\u6837\u5f0f\uff0c\u4f8b\u5982\uff0c\u53d8\u6210\u5708\u5b50\u91cc\u4eba\u90fd\u8ba4\u4e3a\u6ca1\u6bdb\u75c5\u7684\u900f\u660e\u8272\uff1a<\/p>\n
\/* \u7ed9\u5f39\u6846\u80cc\u666f\u52a0\u4e2a\u900f\u660e *\/<\/span>\r\ndialog::backdrop {\r\n    background-color: #fff;\r\n    background-image: linear-gradient(45deg, #eee 25%, transparent 25%, transparent 75%, #eee 75%, #eee), linear-gradient(45deg, #eee 25%, transparent 25%, transparent 75%, #eee 75%, #eee);\r\n    background-size: 16px 16px;\r\n    background-position: 0 0, 8px 8px;\r\n}<\/pre>\n
\u7ed3\u679c\u5f39\u6846\u51fa\u73b0\u540e\u7684\u6548\u679c\u5982\u4e0b\u622a\u56fe\uff1a<\/p>\n
\"\u5f39\u6846\u80cc\u666f\u6539\u6210\u900f\u660e\"<\/p>\n
\u773c\u89c1\u4e3a\u5b9e\uff0c\u60a8\u53ef\u4ee5\u72e0\u72e0\u5730\u70b9\u51fb\u8fd9\u91cc\uff1aCSS ::backdrop\u6539\u53d8dialog\u5143\u7d20\u80cc\u666fdemo<\/a><\/p>\n
\u9664\u4e86\u63a7\u5236\u80cc\u666f\uff0c\u6211\u4eec\u8fd8\u53ef\u4ee5\u63a7\u5236\u5c3a\u5bf8\uff0c\u52a0\u9634\u5f71\u7b49\uff0c\u4f8b\u5982\u518d\u6dfb\u52a0\u5982\u4e0bCSS\uff1a<\/p>\n
dialog::backdrop {\r\n    width: 50%;\r\n    box-shadow: 0 0 100px 30px;\r\n}<\/pre>\n
\u6548\u679c\u5982\u4e0b\u622a\u56fe\uff1a<\/p>\n
\"width\u548cbox-shadow\u8bbe\u7f6e\u540e\u7684\u6548\u679c\u622a\u56fe\"<\/p>\n
\u8fd9\u91cc\uff0c\u5c31\u53ef\u4ee5\u987a\u5176\u81ea\u7136\u5f15\u51fa\u5173\u4e8e::backdrop<\/code>\u4f2a\u5143\u7d20\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7279\u6027\uff1a<\/p>\n
::backdrop\u4f2a\u5143\u7d20\u65e2\u4e0d\u7ee7\u627f\u4e5f\u4e0d\u7ee7\u627f\u4efb\u4f55\u5176\u4ed6\u5143\u7d20\u3002\u4efb\u4f55CSS\u90fd\u53ef\u4ee5\u5e94\u7528\uff0c\u6ca1\u6709\u9650\u5236\u3002<\/strong><\/p>\n
\u56db\u3001fullscreen API\u4e0e::backdrop<\/h3>\n
\u5173\u4e8e\u7f51\u9875\u5185\u5bb9\u5168\u5c4f\uff0c\u5f88\u65e9\u4e4b\u524d\u6709\u4ecb\u7ecd\u8fc7\uff0c\u53ef\u4ee5\u53c2\u8003\u4e4b\u524d\u7684\u201cHTML5\u5168\u5c4fAPI\u5728FireFox\/Chrome\u4e2d\u7684\u663e\u793a\u5dee\u5f02<\/a>\u201d\u8fd9\u7bc7\u6587\u7ae0\u3002<\/p>\n
\u5f53\u501f\u52a9HTML5 fullscreen API\u8ba9\u7f51\u9875\u4e2d\u7684\u67d0\u4e2a\u666e\u901a\u5143\u7d20\u5168\u5c4f\u7684\u65f6\u5019\uff0c::backdrop\u4f2a\u5143\u7d20\u4e5f\u662f\u53ef\u4ee5\u63a7\u5236\u80cc\u540e\u7684\u80cc\u666f\u7684\u3002<\/p>\n
\u4f8b\u5982\uff0c\u6211\u4eec\u8ba9\u4e00\u4e2a<img><\/code>\u5143\u7d20\u5168\u5c4f\uff0c\u5219\u53ef\u4ee5\u4f7f\u7528\u4e0b\u9762\u7684CSS\u8ba9\u5168\u5c4f\u540e\u7684\u56fe\u7247backdrop\u80cc\u666f\u53d8\u6210\u201c\u900f\u660e\u201d\uff1a<\/p>\n
\/* \u56fe\u7247\u5168\u5c4f\u540e\u80cc\u666f\u900f\u660e *\/<\/span>\r\nimg::backdrop {\r\n    background-color: #fff;\r\n    background-image: linear-gradient(45deg, #eee 25%, transparent 25%, transparent 75%, #eee 75%, #eee), linear-gradient(45deg, #eee 25%, transparent 25%, transparent 75%, #eee 75%, #eee);\r\n    background-size: 16px 16px;\r\n    background-position: 0 0, 8px 8px;\r\n}<\/pre>\n
\u7ed3\u679c\u5982\u4e0bGIF\u56fe\u6240\u793a\uff1a<\/p>\n
\"\u70b9\u51fb\u59b9\u5b50\u5168\u5c4f\u540e\u7684\u6548\u679c\"<\/p>\n
\u5982\u679c\u5fc3\u75d2\u75d2\uff0c\u60f3\u8981\u4eb2\u81ea\u4f53\u9a8c\u4e00\u756a\uff0c\u53ef\u4ee5\u72e0\u72e0\u5730\u70b9\u51fb\u8fd9\u91cc\uff1aCSS ::backdrop\u63a7\u5236\u5168\u5c4fimg\u5143\u7d20\u80cc\u666fdemo<\/a><\/p>\n
::backdrop<\/code>\u5bf9\u80cc\u666f\u7684\u63a7\u5236\u8981\u6bd4:-moz-full-screen{}<\/code>\u6216:-webkit-full-screen{}<\/code>\u7b49\u4f2a\u7c7b\u8981\u66f4\u5f3a\u3002<\/p>\n
\u4e94\u3001\u7ed3\u8bed<\/h3>\n
\u4eca\u5929\u5fae\u535a3\u5927\u4e8b\uff1a\u5751\u4e86\u6211\u4eac\u4e1c\u80a1\u7968\u7684\u5f3a\u5b50\u54e5\u4e0d\u88ab\u8d77\u8bc9\uff1b\u6768\u5e42\u5218\u607a\u5a01\u5408\u4f5c\u751f\u610f\u5408\u540c\u5230\u671f\uff1b\u56fd\u52a1\u9662\u7b7e\u7f72\u5b8c\u5168\u770b\u4e0d\u61c2\u7684\u4e2a\u7a0e\u65b0\u65b9\u6cd5\u3002<\/p>\n
\u4eca\u5929\u4e0b\u5348\u53bb\u7535\u5f71\u9662\u770b\u4e86\u300a\u6d77\u738b\u300b\uff0c\u867d\u7136\u6545\u4e8b\u60c5\u8282\u7b80\u5355\uff0c\u4e8b\u540e\u7ecf\u4e0d\u4f4f\u63a8\u8350\uff0c\u4f46\u770b\u7684\u65f6\u5019\u5f88high\u5f88\u71c3\u3002\u60f3\u60f3\u6211\u4eec\u5382\u90a3\u4e9bIP\u6545\u4e8b\uff0c\u6545\u4e8b\u90fd\u5f88\u68d2\u7684\uff0c\u4f46\u662f\u62cd\u51fa\u6765\u7684\u6709\u51e0\u90e8\u7247\u5b50\uff0c\u5b9e\u5728\u662f\u2026\u2026\u600e\u4e48\u8bf4\u5462\uff0c\u7528\u540c\u4e8b\u7684\u8bdd\u8bb2\u5c31\u662f\u60f3\u8d81\u7740\u5403\u996d\u7684\u65f6\u95f4\u770b\u51e0\u96c6\u652f\u6301\u4e0b\uff0c\u7ed3\u679c\u786c\u662f\u770b\u4e0d\u4e0b\u53bb\u3002\u5148\u4e0d\u8bf4\u7279\u6548\u6280\u672f\u5dee\u4e8610\u591a\u5e74\uff0c\u5355\u5355\u5c31\u8fd9\u955c\u5934\u8fd0\u7528\uff0c\u58f0\u97f3\u6e32\u67d3\uff0c\u5b9e\u5728\u5dee\u592a\u591a\u4e86\u3002<\/p>\n
\u4e0d\u8fc7\u561b\uff0c\u521a\u5f00\u59cb\uff0c\u4e0d\u6210\u719f\u662f\u6b63\u5e38\u7684\uff0c\u5e0c\u671b\u53ef\u4ee5\u501f\u52a9\u8d44\u672c\u7684\u529b\u91cf\uff0c\u8ba9\u6211\u4eec\u56fd\u5bb6\u7684\u5f71\u89c6\u884c\u4e1a\u66f4\u4e0a\u4e00\u4e2a\u53f0\u9636\u3002\u5c0f\u767d\u5957\u8def\u6545\u4e8b\u4e5f\u80fd\u62cd\u51fa\u9707\u64bc\u7684\u6548\u679c\u3002<\/p>\n
\u4e0d\u591a\u626f\u4e86\uff0c\u6700\u540e\u8bf4\u4e0b::backdrop<\/code>\u4f2a\u5143\u7d20\u517c\u5bb9\u6027\u5427\u3002<\/p>\n
\u6bd4\u8f83\u590d\u6742\uff0c\u5e38\u89c4\u4f7f\u7528\u517c\u5bb9\u6027\u8fd8\u662f\u5f88\u4e0d\u9519\u7684\uff0cIE\u548cEdge\u9700\u8981-ms-<\/code>\u79c1\u6709\u524d\u7f00\uff1a<\/p>\n
\"\u517c\u5bb9\u6027\"<\/p>\n
\u5982\u679c\u662f<dialog><\/code>\u5143\u7d20\u7684\u80cc\u666f\u4fee\u6539\uff0c\u5219\u517c\u5bb9\u6027\u548c<dialog><\/code>\u5143\u7d20\u662f\u4e00\u81f4\u7684\uff0c\u76ee\u524d\u4ec5Chrome\u6d4f\u89c8\u5668\u5b8c\u5168\u652f\u6301\uff0cFirefox\u5b9e\u9a8c\u652f\u6301\u3002<\/p>\n
\"\u517c\u5bb9\u6027\u622a\u56fe\"<\/p>\n
\u5982\u679c\u662f\u5168\u5c4fAPI\uff0c\u5219\u517c\u5bb9\u6027\u5982\u4e0b\uff1a<\/p>\n
\"\u5168\u5c4f\u4e0b\u517c\u5bb9\u6027\"<\/p>\n
\u5c31\u8fd9\u6837\u5427\uff0c\u611f\u8c22\u9605\u8bfb\uff01<\/p>\n
<\/p>\n
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\n\u672c\u6587\u5730\u5740\uff1ahttps:\/\/www.zhangxinxu.com\/wordpress\/?p=8305<\/a><\/p>\n
\uff08\u672c\u7bc7\u5b8c\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"
\"backdrop\u5934\u56fe\"<\/p>\n
CSS ::backdrop\u4f2a\u5143\u7d20\u53ef\u4ee5\u63a7\u5236\u89c6\u9891\uff0c\u5f39\u6846\u6216\u8005\u666e\u901a\u5168\u5c4f\u5143\u7d20\u7684\u9ed1\u8272\u8499\u5c42\u80cc\u666f\u6837\u5f0f\u7684\u3002\u517c\u5bb9\u6027\u8fd8\u5f88\u4e0d\u9519\uff0c\u5b9e\u9645\u9879\u76ee\u4e2d\u53ef\u4ee5\u7528\u4e00\u7528\u3002<\/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":[1393,1271,1394,52,340,823,523,26],"_links":{"self":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/8305"}],"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=8305"}],"version-history":[{"count":0,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/8305\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/media?parent=8305"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/categories?post=8305"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/tags?post=8305"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}