{"id":8972,"date":"2019-09-19T00:02:22","date_gmt":"2019-09-18T16:02:22","guid":{"rendered":"https:\/\/www.zhangxinxu.com\/wordpress\/?p=8972"},"modified":"2019-10-13T22:54:43","modified_gmt":"2019-10-13T14:54:43","slug":"js-focus-preventscroll","status":"publish","type":"post","link":"https:\/\/www.zhangxinxu.com\/wordpress\/2019\/09\/js-focus-preventscroll\/","title":{"rendered":"\u5c0ftips: \u5143\u7d20focus\u9875\u9762\u4e0d\u6eda\u52a8\u4e0d\u5b9a\u4f4d\u7684JS\u5904\u7406"},"content":{"rendered":"<p>by <a href=\"https:\/\/www.zhangxinxu.com\/\">zhangxinxu<\/a> from <a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/?p=8972\">https:\/\/www.zhangxinxu.com\/wordpress\/?p=8972<\/a><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\/201909-focus-scroll.png';<\/script><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/\/image.zhangxinxu.com\/image\/blog\/201909\/cuf-tea.png\" width=\"484\" height=\"311\" alt=\"\u5496\u5561\u676f\u91d1\u5c5e focus\u6eda\u52a8\u5b9a\u4f4d\u5360\u4f4d\u56fe\" class=\"alignright thumb clip size-medium\" \/><\/p>\n<h3>\u4e00\u3001\u95ee\u9898\u7684\u7531\u6765<\/h3>\n<p>\u6709\u65f6\u5019\u6211\u4eec\u5e0c\u671b\u5143\u7d20\u88abfocus\u7684\u65f6\u5019\u9875\u9762\u4e0d\u53d1\u751f\u6eda\u52a8\uff0c\u4f8b\u5982\u6211\u4eec\u70b9\u51fb\u4e00\u4e2a\u6309\u94ae\u6253\u5f00\u4e00\u4e2a\u5f39\u6846\uff0c\u6b64\u65f6\u70b9\u51fb\u5f39\u6846\u4e2d\u7684\u5173\u95ed\u6309\u94ae\u9690\u85cf\u5f39\u6846\u540e\uff0c\u5e0c\u671b\u952e\u76d8\u7684\u7126\u70b9\u56de\u5230\u4e4b\u524d\u7684\u6309\u94ae\u4e0a\uff0c\u6211\u4eec\u5c31\u4f1a\u6267\u884c\u5982\u4e0bJavaScript\u4ee3\u7801\uff1a<\/p>\n<pre>button.focus();<\/pre>\n<p>\u4f46\u662f\u6709\u65f6\u5019\u4f1a\u5e26\u6765\u53e6\u5916\u4e00\u4e2a\u6bd4\u8f83\u4e25\u91cd\u7684\u4f53\u9a8c\u95ee\u9898\uff0c\u90a3\u5c31\u662f\u5982\u679c\u5f39\u6846\u663e\u793a\u4e4b\u540e\u6211\u4eec\u9875\u9762\u53d1\u751f\u4e86\u6eda\u52a8\uff0c\u539f\u672c\u70b9\u51fb\u7684\u6309\u94ae\u8dd1\u5230\u4e86\u5c4f\u5e55\u663e\u793a\u533a\u57df\u4e4b\u5916\uff0c\u8fd9\u4e2a\u65f6\u5019\uff0c\u6309\u94ae\u518d\u6b21focus\u7684\u65f6\u5019\u5c31\u4f1a\u89e6\u53d1\u6309\u94ae\u5143\u7d20scrollIntoView\u91cd\u5b9a\u4f4d\uff0c\u6d4f\u89c8\u5668\u53d1\u751f\u6eda\u52a8\uff0c\u8868\u73b0\u4e3a\u7a81\u7136\u7684\u8df3\u52a8\uff0c\u4f53\u9a8c\u5f88\u4e0d\u597d\u3002<\/p>\n<p>\u6211\u4eec\u9884\u671f\u7684\u76ee\u6807\u662f\uff1a\u6309\u94aefocus\uff0c\u7136\u540e\u65e0\u8bba\u6309\u94ae\u5728\u4e0d\u5728\u5c4f\u5e55\u663e\u793a\u533a\u5185\uff0c\u90fd\u4e0d\u4f1a\u53d1\u73b0\u6d4f\u89c8\u5668\u7684\u6eda\u52a8\u91cd\u5b9a\u4f4d\u3002<\/p>\n<p>\u5982\u4f55\u5b9e\u73b0\u5462\uff1f<\/p>\n<h3>\u4e8c\u3001\u5168\u65b0\u7684API\u53c2\u6570preventScroll<\/h3>\n<p>\u5982\u679c\u60f3\u8981\u805a\u7126\u540c\u65f6\u4e0d\u53d1\u751f\u6eda\u52a8\uff0c\u5176\u5b9e\u5f88\u7b80\u5355\uff0c\u4f7f\u7528\u4e00\u4e2a\u5168\u65b0\u7684API\u53c2\u6570preventScroll\u5c31\u53ef\u4ee5\u4e86\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre>button.focus({ \r\n    preventScroll: true \r\n});<\/pre>\n<p><code>preventScroll<\/code>\u662f\u4e00\u4e2a\u53ef\u9009\u53c2\u6570\uff0c\u9ed8\u8ba4\u503c\u662f<code>false<\/code>\uff0c\u8868\u793a\u4e0d\u963b\u6b62\u805a\u7126\u6eda\u52a8\u3002\u5982\u679c<code>preventScroll<\/code>\u53c2\u6570\u503c\u662f<code>true<\/code>\u5219\u8868\u793a\u53ea\u805a\u7126\u4e0d\u6eda\u52a8\u3002<\/p>\n<p>\u6211\u4eec\u6765\u770b\u4e00\u4e2a\u4f8b\u5b50\uff0c\u60a8\u53ef\u4ee5\u72e0\u72e0\u5730\u70b9\u51fb\u8fd9\u91cc\uff1a<a href=\"https:\/\/www.zhangxinxu.com\/study\/201909\/focu-preventdefault-demo.php\" rel=\"noopener\" target=\"_blank\">JS focus preventScroll\u53c2\u6570\u4f7f\u7528demo<\/a> <\/p>\n<p>demo\u9875\u9762\u6709\u4e24\u4e2a\u6309\u94ae\uff0c\u4e00\u4e2a\u6309\u94ae\u70b9\u51fb\u76f4\u63a5focus\uff0c\u53e6\u5916\u4e00\u4e2a\u662f\u8bbe\u7f6e\u4e86<code>{preventScroll:true}<\/code>\u3002<\/p>\n<p>\u7ed3\u679c\u6700\u7ec8\u7684\u6548\u679c\u5982\u4e0bGIF\u5f55\u5c4f\u6240\u793a\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/\/image.zhangxinxu.com\/image\/blog\/201909\/focus-preventscroll.gif\" width=\"443\" height=\"212\" alt=\"focus\u4e0e\u6eda\u52a8\u4e0d\u5b9a\u4f4d\u7684\u6548\u679c\" class=\"alignnone size-medium\" \/><\/p>\n<h4>\u517c\u5bb9\u6027<\/h4>\n<p><code>preventScroll<\/code>\u53c2\u6570\u517c\u5bb9\u6027\u5982\u4e0b\u8868\uff1a<\/p>\n<table class=\"params_table\" cellspacing=\"1\">\n<thead>\n<tr>\n<th align=\"center\"><img loading=\"lazy\" decoding=\"async\" src=\"\/\/image.zhangxinxu.com\/image\/study\/browser\/chrome.png\" width=\"48\" height=\"48\" alt=\"Chrome logo\"><\/th>\n<th align=\"center\"><img loading=\"lazy\" decoding=\"async\" src=\"\/\/image.zhangxinxu.com\/image\/study\/browser\/firefox.png\" width=\"48\" height=\"48\" alt=\"Firefox logo\"><\/th>\n<th align=\"center\"><img loading=\"lazy\" decoding=\"async\" src=\"\/\/image.zhangxinxu.com\/image\/study\/browser\/ie.png\" width=\"48\" height=\"48\" alt=\"Internet Explorer logo\"><\/th>\n<th align=\"center\"><img loading=\"lazy\" decoding=\"async\" src=\"\/\/image.zhangxinxu.com\/image\/study\/browser\/edge.png\" width=\"48\" height=\"48\" alt=\"Edge logo\"><\/th>\n<th align=\"center\"><img loading=\"lazy\" decoding=\"async\" src=\"\/\/image.zhangxinxu.com\/image\/study\/browser\/opera.png\" width=\"48\" height=\"48\" alt=\"Opera logo\"><\/th>\n<th align=\"center\"><img loading=\"lazy\" decoding=\"async\" src=\"\/\/image.zhangxinxu.com\/image\/study\/browser\/safari.png\" width=\"48\" height=\"48\" alt=\"Safari logo\"><\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td align=\"center\">64+ \u2714<\/td>\n<td align=\"center\">68+ \u2714<\/td>\n<td align=\"center\">\u2718<\/td>\n<td align=\"center\">\u2718<\/td>\n<td align=\"center\">51+ \u2714<\/td>\n<td align=\"center\">\u2753<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u624b\u5934\u6ca1\u6709Safari\u6d4f\u89c8\u5668\uff0c\u56e0\u6b64\u517c\u5bb9\u6027\u4e0d\u8be6\uff0c\u6b22\u8fce\u5927\u5bb6\u53cd\u9988\u3002<\/p>\n<h3>\u4e09\u3001IE\u6d4f\u89c8\u5668\u4e0b\u7684\u5904\u7406<\/h3>\n<p>IE\u6d4f\u89c8\u5668\u4e0d\u652f\u6301\u8fd9\u4e2a\u975e\u5e38\u68d2\u7684API\uff0c\u5982\u679c\u6211\u4eec\u8981\u8ba9\u8fd9\u4e2a\u6d4f\u89c8\u5668\u652f\u6301\u600e\u4e48\u529e\u5462\uff1f<\/p>\n<h4>\u65b9\u6cd5\u4e00\uff1a\u653e\u5f03IE\/Edge<\/h4>\n<p>IE\/Egde\u8fde\u81ea\u5df1\u90fd\u653e\u5f03\u81ea\u5df1\u6295\u5954Chrome\u4e86\uff0c\u6211\u4eec\u8fd8\u6709\u4ec0\u4e48\u7406\u7531\u652f\u6301\u4ed6\u5462\uff01<\/p>\n<h4>\u65b9\u6cd5\u4e8c\uff1apolyfill<\/h4>\n<p>\u8fd9\u91cc\u6709\u4e2a\u4eba\u5199\u4e86\u4e2afocus\u7684polyfill\uff1a<a href=\"https:\/\/github.com\/calvellido\/focus-options-polyfill\" rel=\"noopener nofollow\" target=\"_blank\">https:\/\/github.com\/calvellido\/focus-options-polyfill<\/a><\/p>\n<p>\u7136\u800c\uff0c\u6839\u636e\u6211\u5728IE\u6d4f\u89c8\u5668\u4e0b\u7684\u5b9e\u5730\u4f7f\u7528\uff0c\u6709\u5751\uff0c\u6548\u679c\u5f88\u5947\u602a\uff0c\u56e0\u6b64\uff0c\u4e0a\u9762\u8fd9\u4e2apolyfill\u4e0d\u5efa\u8bae\u4f7f\u7528\u3002<\/p>\n<h4>\u65b9\u6cd5\u4e09\uff1a\u4e34\u65f6\u8865\u4e01<\/h4>\n<p>\u62ff\u5782\u76f4\u6eda\u52a8\u8ddd\u79bb\uff0c\u6211\u4eec\u53ef\u4ee5\u8fd9\u6837JS\u5904\u7406\uff1a<\/p>\n<pre>var y = window.pageYOffset;\r\nbutton.focus({ \r\n    preventScroll: true \r\n});\r\n<span style=\"color:green;\">\/\/ IE\u6d4f\u89c8\u5668\u7684\u5904\u7406<\/span>\r\nif (window.pageYOffset != y) {\r\n    setTimeout(function () {\r\n        document.documentElement.scrollTop = y;\r\n    }, 0)\r\n}<\/pre>\n<p>\u4f46\u6b64\u65b9\u6cd5\u5e76\u4e0d\u5b8c\u7f8e\uff0c\u6709\u4e00\u5b9a\u6982\u7387\u9875\u9762\u4f1a\u6296\u4e00\u4e0b\u3002<\/p>\n<hr>\n<p>\u6211\u5728\u5b9e\u9645\u9879\u76ee\u4e2d\u7684\u5904\u7406\u65b9\u6cd5\u5c31\u662f\u65b9\u6cd5\u4e00\uff0c\u76f4\u63a5\u5ffd\u7565IE\u6d4f\u89c8\u5668\uff0c\u5373\u4f7f\u9879\u76ee\u8981\u517c\u5bb9IE\u6d4f\u89c8\u5668\uff0c\u6bd5\u7adf\u662f\u4f53\u9a8c\u589e\u5f3a\u7684\u4e1c\u897f\uff0c\u4f7f\u7528IE\u6d4f\u89c8\u5668\u7684\u7528\u6237\u80fd\u591f\u5fcd\u53d7\u7684\u7cdf\u7cd5\u4f53\u9a8c\u8981\u6bd4\u6211\u4eec\u9884\u60f3\u7684\u5927\u7684\u591a\uff0c\u56e0\u4e3aIE\u6d4f\u89c8\u5668\u672c\u8eab\u5c31\u662f\u4e2a\u4f53\u9a8c\u7cdf\u7cd5\u7684\u4ea7\u54c1\u3002<\/p>\n<h3>\u56db\u3001\u77ed\u6587\u4e5f\u8981\u7ed3\u675f\u8bed<\/h3>\n<p><code>focus()<\/code>\u65b9\u6cd5\u7684API\u5728\u6587\u6863\u4e2d\u90fd\u662f\u5199\u4f5cHTMLElement.focus()\uff0c\u8bf4\u660e\u6240\u6709\u7684HTML\u5143\u7d20\u90fd\u6709focus\u65b9\u6cd5\uff0c\u56e0\u4e3a\u867d\u7136\u666e\u901a\u5143\u7d20\u9ed8\u8ba4\u662f\u4e0d\u80fd\u88abfocus\u7684\uff0c\u4f46\u662f\u5982\u679c\u6211\u4eec\u8bbe\u7f6e\u5408\u9002\u7684<code>tabindex<\/code>\u5c5e\u6027\u503c\uff0c\u60c5\u51b5\u5c31\u4f1a\u53d1\u751f\u53d8\u5316\uff0c\u53ef\u4ee5\u88abfocus\uff0c\u66f4\u591a\u66f4\u6df1\u5165\u66f4\u6709\u8da3\u77e5\u8bc6\u53ef\u4ee5\u53c2\u89c1\u8fd9\u7bc7\u6587\u7ae0\uff1a\u201c<a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/2017\/05\/html-tabindex\/\">HTML tabindex\u5c5e\u6027\u4e0eweb\u7f51\u9875\u952e\u76d8\u65e0\u969c\u788d\u8bbf\u95ee<\/a>\u201d\u3002<\/p>\n<p>\u56e0\u6b64\uff0c\u6211\u4eec\u76f4\u63a5\u4e0b\u9762\u8fd9\u6837\u4f7f\u7528\u90fd\u662f\u4e0d\u4f1a\u62a5\u9519\u7684\uff1a<\/p>\n<pre>document.body.focus();\r\ndocument.createElement('div').focus();<\/pre>\n<p>\u4f46\u662f\u5982\u679c\u662f\u5176\u4ed6\u65b9\u6cd5\uff0c\u4f8b\u5982<code>submit<\/code>\u5c31\u4f1a\u62a5\u9519\uff1a<\/p>\n<pre style=\"opacity:.75;\"><span style=\"color:#cd0000;\">\/\/ \u4f1a\u51fa\u9519\uff0c\u4e0d\u652f\u6301<\/span>\r\ndocument.body.submit();\r\ndocument.createElement('div').submit();<\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/\/image.zhangxinxu.com\/image\/blog\/201909\/2019-09-18_235150.png\" width=\"383\" height=\"167\" alt=\"submit\u51fa\u9519\u63d0\u793a\" class=\"alignnone size-medium\" \/><\/p>\n<p>\u597d\uff0c\u5c31\u8bf4\u8fd9\u4e48\u591a\uff0c\u6bd4\u539f\u672c\u9884\u8ba1\u7684\u591a\u5199\u4e86\u534a\u5c0f\u65f6\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/\/image.zhangxinxu.com\/image\/emtion\/emoji\/1f61c.svg\" width=\"20\" height=\"20\" align=\"absmiddle\"><\/p>\n<p>\u672c\u6587\u4e3a\u539f\u521b\u6587\u7ae0\uff0c\u6b22\u8fce\u5206\u4eab\uff0c\u52ff\u5168\u6587\u8f6c\u8f7d\uff0c\u5982\u679c\u5185\u5bb9\u4f60\u5b9e\u5728\u559c\u6b22\uff0c\u53ef\u4ee5\u52a0\u5165\u6536\u85cf\u5939\uff0c\u6c38\u4e0d\u8fc7\u671f\uff0c\u800c\u4e14\u8fd8\u4f1a\u53ca\u65f6\u66f4\u65b0\u77e5\u8bc6\u70b9\u4ee5\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=8972\">https:\/\/www.zhangxinxu.com\/wordpress\/?p=8972<\/a><\/p>\n<p>\uff08\u672c\u7bc7\u5b8c\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"<p><img decoding=\"async\" src=\"\/\/image.zhangxinxu.com\/image\/blog\/201909\/cuf-tea.png\" width=\"161\" height=\"103\" alt=\"focus\u6eda\u52a8\u5b9a\u4f4d\u5360\u4f4d\u56fe\" class=\"alignright size-medium\" loading=\"lazy\" \/><\/p>\n<p>\u6709\u65f6\u5019\u6211\u4eec\u5e0c\u671b\u5143\u7d20\u88abfocus\u7684\u540c\u65f6\u6d4f\u89c8\u5668\u7684\u4e0d\u4f1a\u53d1\u751f\u6eda\u52a8\u91cd\u5b9a\u4f4d\uff0c\u770b\u8d77\u6765\u4f3c\u4e4e\u662f\u4e2a\u5f88\u68d8\u624b\u7684\u95ee\u9898\uff0c\u6bd5\u7adffocus\u91cd\u5b9a\u4f4d\u662f\u4e00\u4e2a\u5f88\u91cd\u8981\u7684\u6d4f\u89c8\u5668\u5185\u7f6e\u7684\u7528\u6237\u4f53\u9a8c\u884c\u4e3a\uff0c\u5b9e\u9645\u4e0a\uff0c\u5927\u5bb6\u53ef\u80fd\u4e0d\u77e5\u9053\uff0c\u5df2\u7ecf\u6709\u65b0\u7684API\u53c2\u6570\u652f\u6301\u8fd9\u79cd\u9700\u6c42\u4e86\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1284],"tags":[547,295,1273,1497,1454,624,252,124],"_links":{"self":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/8972"}],"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=8972"}],"version-history":[{"count":0,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/8972\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/media?parent=8972"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/categories?post=8972"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/tags?post=8972"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}