{"id":7113,"date":"2023-10-16T15:31:25","date_gmt":"2023-10-16T07:31:25","guid":{"rendered":"https:\/\/i007.vip:15443\/wordpress\/?p=7113"},"modified":"2023-10-16T15:31:25","modified_gmt":"2023-10-16T07:31:25","slug":"%e4%bd%bf%e7%94%a8-tabindex","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/7113","title":{"rendered":"\u4f7f\u7528 tabindex"},"content":{"rendered":"

cc from<\/a><\/p>\n

*\u56fe\u7247\u672a\u5904\u7406<\/p>\n

\u4f5c\u8005\uff1aMeggin Kearney\u3001Dave Gash\u3001Rob Dodson<\/p><\/blockquote>\n

\u539f\u751f\u5143\u7d20 DOM \u4f4d\u7f6e\u63d0\u4f9b\u7684\u9ed8\u8ba4 Tab \u952e\u987a\u5e8f\u867d\u7136\u65b9\u4fbf\uff0c\u4f46\u6709\u65f6\u60a8\u9700\u8981\u4fee\u6539 Tab \u952e\u987a\u5e8f\uff0c\u800c\u5728 HTML \u4e2d\u5bf9\u5143\u7d20\u8fdb\u884c\u7269\u7406\u79fb\u52a8\u5e76\u4e0d\u603b\u662f\u6700\u4f18\u89e3\u51b3\u65b9\u6848\uff0c\u751a\u81f3\u7f3a\u4e4f\u53ef\u884c\u6027\u3002\u5728\u6b64\u7c7b\u60c5\u51b5\u4e0b\uff0c\u60a8\u53ef\u4ee5\u5229\u7528tabindex<\/code>HTML \u5c5e\u6027\u6765\u663e\u5f0f\u8bbe\u7f6e\u5143\u7d20\u7684 Tab \u952e\u4f4d\u7f6e\u3002<\/p>\n

tabindex<\/code>\u53ef\u5e94\u7528\u4e8e\u4efb\u4f55\u5143\u7d20\u5e76\u63a5\u53d7\u67d0\u4e00\u8303\u56f4\u7684\u6574\u578b\u503c\uff0c\u4f46\u4e0d\u4e00\u5b9a\u5728\u6bcf\u4e2a\u5143\u7d20\u4e0a\u90fd\u6709\u7528\u3002 \u60a8\u53ef\u4ee5\u5229\u7528tabindex<\/code>\u4e3a\u53ef\u805a\u7126\u9875\u9762\u5143\u7d20\u6307\u5b9a\u663e\u5f0f\u987a\u5e8f\u3001\u5728 Tab \u952e\u987a\u5e8f\u4e2d\u63d2\u5165\u539f\u672c\u4e0d\u53ef\u805a\u7126\u7684\u5143\u7d20\u4ee5\u53ca\u4ece Tab \u952e\u987a\u5e8f\u4e2d\u79fb\u9664\u5143\u7d20\u3002<\/p>\n

\u4f8b\u5982\uff1atabindex=\"0\"<\/code>\uff1a\u5728\u81ea\u7136 Tab \u952e\u987a\u5e8f\u4e2d\u63d2\u5165\u4e00\u4e2a\u5143\u7d20\u3002\u53ef\u901a\u8fc7\u6309Tab<\/code>\u952e\u805a\u7126\u8be5\u5143\u7d20\uff0c\u4e5f\u53ef\u901a\u8fc7\u8c03\u7528\u5176focus()<\/code>\u65b9\u6cd5\u805a\u7126\u8be5\u5143\u7d20<\/p>\n

<custom-button<\/span> tabindex<\/span>=\"0\"<\/span>><\/span>Press Tab to Focus Me!<\/custom-button<\/span>><\/span>\r\n<\/code><\/pre>\n
tabindex=\"-1\"<\/code>\uff1a\u4ece\u81ea\u7136 Tab \u952e\u987a\u5e8f\u4e2d\u79fb\u9664\u67d0\u4e2a\u5143\u7d20\uff0c\u4f46\u4ecd\u53ef\u901a\u8fc7\u8c03\u7528\u5176focus()<\/code>\u65b9\u6cd5\u805a\u7126\u8be5\u5143\u7d20<\/p>\n
<button<\/span> id<\/span>=\"foo\"<\/span> tabindex<\/span>=\"-1\"<\/span>><\/span>I'm not keyboard focusable<\/button<\/span>><\/span>\r\n<button<\/span> onclick<\/span>=\"foo.focus();\"<\/span>><\/span>Focus my sibling<\/button<\/span>><\/span>\r\n<\/code><\/pre>\n
tabindex=\"5\"<\/code>\uff1a\u53ea\u8981 tabindex \u5927\u4e8e 0\uff0c\u5c31\u4f1a\u5c06\u8be5\u5143\u7d20\u8df3\u81f3\u81ea\u7136 Tab \u952e\u987a\u5e8f\u7684\u6700\u524d\u9762\u3002 \u5982\u679c\u6709\u591a\u4e2a\u5143\u7d20\u7684 tabindex \u5747\u5927\u4e8e 0\uff0cTab \u952e\u987a\u5e8f\u5c06\u4ee5\u5927\u4e8e 0 \u7684\u6700\u5c0f\u503c\u4e3a\u8d77\u70b9\uff0c\u4ece\u5c0f\u5230\u5927\u6392\u5e8f\u3002\u4f7f\u7528\u5927\u4e8e 0 \u7684 tabindex \u88ab\u89c6\u4e3a\u53cd\u9762\u6a21\u5f0f<\/strong>\u3002<\/p>\n
<button<\/span>><\/span>I should be first<\/button<\/span>><\/span>\r\n<button<\/span>><\/span>And I should be second<\/button<\/span>><\/span>\r\n<button<\/span> tabindex<\/span>=\"5\"<\/span>><\/span>But I jumped to the front!<\/button<\/span>><\/span>\r\n<\/code><\/pre>\n
\u8fd9\u5728\u6807\u5934\u3001\u56fe\u50cf\u6216\u6587\u7ae0\u6807\u9898\u4e4b\u7c7b\u7684\u975e\u8f93\u5165\u5143\u7d20\u4e0a\u4f53\u73b0\u5f97\u5c24\u4e3a\u660e\u663e\u3002 \u4e3a\u4e0a\u8ff0\u7c7b\u578b\u7684\u5143\u7d20\u6dfb\u52a0tabindex<\/code>\u4f1a\u9002\u5f97\u5176\u53cd\u3002\u5982\u6709\u53ef\u80fd\uff0c\u6700\u597d\u9002\u5f53\u5b89\u6392\u6e90\u4ee3\u7801\uff0c\u8ba9 DOM \u5e8f\u5217\u5177\u6709\u7b26\u5408\u903b\u8f91\u7684 Tab \u952e\u987a\u5e8f\u3002\u5982\u679c\u60a8\u4e00\u5b9a\u8981\u4f7f\u7528tabindex<\/code>\uff0c\u8bf7\u5c06\u5176\u4f7f\u7528\u8303\u56f4\u9650\u5b9a\u5728\u6309\u94ae\u3001\u6807\u7b7e\u3001\u4e0b\u62c9\u5217\u8868\u548c\u6587\u672c\u5b57\u6bb5\u4e4b\u7c7b\u7684\u81ea\u5b9a\u4e49\u4ea4\u4e92\u5f0f\u63a7\u4ef6\uff1b\u4e5f\u5c31\u662f\u8bf4\uff0c\u7528\u6237\u53ef\u80fd\u9700\u8981\u63d0\u4f9b\u8f93\u5165\u7684\u5143\u7d20\u3002<\/p>\n
\u4e0d\u5fc5\u62c5\u5fc3\u5c4f\u5e55\u9605\u8bfb\u5668\u7528\u6237\u4f1a\u9519\u8fc7\u91cd\u8981\u5185\u5bb9\uff0c\u56e0\u4e3a\u5b83\u6ca1\u6709tabindex<\/code>\u3002 \u5373\u4f7f\u5185\u5bb9\u975e\u5e38\u91cd\u8981\uff08\u4f8b\u5982\u56fe\u50cf\uff09\uff0c\u5982\u679c\u5e76\u975e\u7528\u6237\u53ef\u4ee5\u4ea4\u4e92\u7684\u5bf9\u8c61\uff0c\u4e5f\u6ca1\u6709\u7406\u7531\u5c06\u5176\u8bbe\u7f6e\u4e3a\u53ef\u805a\u7126\u3002\u53ea\u8981\u60a8\u63d0\u4f9b\u5145\u5206\u7684alt<\/code>\u5c5e\u6027\u652f\u6301\uff08\u6211\u4eec\u4e0d\u4e45\u5c06\u4f1a\u4ecb\u7ecd\uff09\uff0c\u5c4f\u5e55\u9605\u8bfb\u5668\u7528\u6237\u4ecd\u53ef\u7406\u89e3\u56fe\u50cf\u7684\u5185\u5bb9\u3002<\/p>\n
\u7ba1\u7406\u9875\u9762\u4e00\u7ea7\u7684\u7126\u70b9<\/h2>\n
\u5728\u4e0b\u9762\u8fd9\u79cd\u60c5\u5883\u4e2d\uff0ctabindex<\/code>\u4e0d\u4ec5\u6709\u7528\uff0c\u8fd8\u5fc5\u4e0d\u53ef\u5c11\u3002\u60a8\u53ef\u80fd\u6b63\u5728\u6784\u5efa\u4e00\u4e2a\u5f3a\u5065\u7684\u5355\u4e00\u9875\u9762\uff0c\u5176\u4e2d\u5305\u542b\u4e0d\u540c\u7684\u5185\u5bb9\u533a\u57df\uff0c\u8fd9\u4e9b\u533a\u57df\u5e76\u975e\u5168\u90fd\u540c\u65f6\u53ef\u89c1\u3002\u5728\u8fd9\u79cd\u9875\u9762\u4e2d\uff0c\u70b9\u51fb\u67d0\u4e2a\u5bfc\u822a\u94fe\u63a5\u65f6\uff0c\u5373\u4f7f\u4e0d\u5237\u65b0\u9875\u9762\u4e5f\u4f1a\u66f4\u6539\u53ef\u89c1\u5185\u5bb9\u3002<\/p>\n
\u53d1\u751f\u8fd9\u79cd\u60c5\u51b5\u65f6\uff0c\u60a8\u53ef\u80fd\u9700\u8981\u627e\u5230\u9009\u5b9a\u7684\u5185\u5bb9\u533a\u57df\uff0c\u5c06\u5176tabindex<\/code>\u6307\u5b9a\u4e3a -1\uff0c\u4f7f\u5176\u4e0d\u51fa\u73b0\u5728\u81ea\u7136 Tab \u952e\u987a\u5e8f\u4e2d\uff0c\u5e76\u8c03\u7528\u5176focus<\/code>\u65b9\u6cd5\u3002\u8fd9\u79cd\u79f0\u4f5c\u7ba1\u7406\u7126\u70b9<\/em>\u7684\u65b9\u6cd5\u53ef\u8ba9\u7528\u6237\u7684\u611f\u77e5\u4e0a\u4e0b\u6587\u4e0e\u7f51\u7ad9\u7684\u89c6\u89c9\u5185\u5bb9\u4fdd\u6301\u540c\u6b65\u3002<\/p>\n
\u7ba1\u7406\u7ec4\u4ef6\u4e2d\u7684\u7126\u70b9<\/h2>\n
\u66f4\u6539\u9875\u9762\u5185\u5bb9\u65f6\u7684\u7126\u70b9\u7ba1\u7406\u5f88\u91cd\u8981\uff0c\u4f46\u6709\u65f6\u9700\u8981\u7ba1\u7406\u63a7\u4ef6\u4e00\u7ea7\u7684\u7126\u70b9\uff08\u4f8b\u5982\uff0c\u5f53\u60a8\u6784\u5efa\u81ea\u5b9a\u4e49\u7ec4\u4ef6\u65f6\uff09\u3002\u4ee5\u539f\u751fselect<\/code>\u5143\u7d20\u4e3a\u4f8b\u3002\u5b83\u53ef\u4ee5\u83b7\u5f97\u57fa\u672c\u7126\u70b9\uff0c\u4f46\u83b7\u5f97\u7126\u70b9\u540e\uff0c\u5373\u53ef\u4f7f\u7528\u7bad\u5934\u952e\u6765\u663e\u9732\u5176\u4ed6\u529f\u80fd\uff08\u53ef\u9009\u62e9\u7684\u9009\u9879\uff09\u3002<\/p>\n
\u5982\u679c\u60a8\u6784\u5efa\u7684\u662f\u81ea\u5b9a\u4e49select<\/code>\u5143\u7d20\uff0c\u4e00\u5b9a\u60f3\u663e\u9732\u540c\u6837\u7c7b\u578b\u7684\u884c\u4e3a\uff0c\u8fd9\u6837\u4e00\u6765\uff0c\u4e3b\u8981\u4f9d\u8d56\u952e\u76d8\u7684\u7528\u6237\u5c31\u4ecd\u53ef\u4e0e\u60a8\u7684\u63a7\u4ef6\u8fdb\u884c\u4ea4\u4e92\u3002<\/p>\n
<!-- Focus the element using Tab and use the up\/down arrow keys to navigate --><\/span>\r\n<select<\/span>><\/span>\r\n  <option<\/span>><\/span>Aisle seat<\/option<\/span>><\/span>\r\n  <option<\/span>><\/span>Window seat<\/option<\/span>><\/span>\r\n  <option<\/span>><\/span>No preference<\/option<\/span>><\/span>\r\n<\/select<\/span>><\/span>\r\n<\/code><\/pre>\n
Aisle seatWindow seatNo preference<\/p>\n
\u6216\u8bb8\u60a8\u6b63\u5728\u5f00\u53d1\u4e00\u4e9b\u81ea\u5b9a\u4e49\u5143\u7d20<\/a>\uff0c\u8fd9\u4e9b\u5143\u7d20\u7c7b\u4f3c\u4e8e\u4e00\u7ec4\u5355\u9009\u6309\u94ae\uff0c\u4f46\u91c7\u7528\u4e86\u60a8\u7279\u6709\u7684\u5916\u89c2\u548c\u884c\u4e3a\u3002<\/p>\n
<radio-group<\/span>><\/span>\r\n  <radio-button<\/span>><\/span>Water<\/radio-button<\/span>><\/span>\r\n  <radio-button<\/span>><\/span>Coffee<\/radio-button<\/span>><\/span>\r\n  <radio-button<\/span>><\/span>Tea<\/radio-button<\/span>><\/span>\r\n  <radio-button<\/span>><\/span>Cola<\/radio-button<\/span>><\/span>\r\n  <radio-button<\/span>><\/span>Ginger Ale<\/radio-button<\/span>><\/span>\r\n<\/radio-group<\/span>><\/span>\r\n<\/code><\/pre>\n
\u6b63\u5982\u60a8\u5728\u8be5\u8868\u4e2d\u6240\u89c1\uff0c\u5e94\u8be5\u652f\u6301\u7684\u5176\u4e2d\u4e00\u4e2a\u5e38\u89c1\u952e\u76d8\u884c\u4e3a\u662f\u5411\u4e0a\/\u5411\u4e0b\/\u5411\u5de6\/\u5411\u53f3\u7bad\u5934\u952e\u3002 \u8981\u5411\u65b0\u7ec4\u4ef6\u6dfb\u52a0\u6b64\u884c\u4e3a\uff0c\u6211\u4eec\u5c06\u91c7\u7528\u4e00\u79cd\u53eb\u505a\u6d41\u52a8 tabindex<\/em>\u7684\u65b9\u6cd5\u3002<\/p>\n
\"\"<\/p>\n
\u6d41\u52a8 tabindex \u901a\u8fc7\u5c06\u9664\u5f53\u524d\u6d3b\u52a8\u5b50\u9879\u4e4b\u5916\u6240\u6709\u5176\u4ed6\u5b50\u9879\u7684tabindex<\/code>\u8bbe\u7f6e\u4e3a -1 \u6765\u53d1\u6325\u4f5c\u7528\u3002<\/p>\n
<radio-group<\/span>><\/span>\r\n  <radio-button<\/span> tabindex<\/span>=\"0\"<\/span>><\/span>Water<\/radio-button<\/span>><\/span>\r\n  <radio-button<\/span> tabindex<\/span>=\"-1\"<\/span>><\/span>Coffee<\/radio-button<\/span>><\/span>\r\n  <radio-button<\/span> tabindex<\/span>=\"-1\"<\/span>><\/span>Tea<\/radio-button<\/span>><\/span>\r\n  <radio-button<\/span> tabindex<\/span>=\"-1\"<\/span>><\/span>Cola<\/radio-button<\/span>><\/span>\r\n  <radio-button<\/span> tabindex<\/span>=\"-1\"<\/span>><\/span>Ginger Ale<\/radio-button<\/span>><\/span>\r\n<\/radio-group<\/span>><\/span>\r\n<\/code><\/pre>\n
\u7136\u540e\uff0c\u7ec4\u4ef6\u4f7f\u7528\u952e\u76d8\u4e8b\u4ef6\u4fa6\u542c\u5668\u6765\u786e\u5b9a\u7528\u6237\u6309\u4e0b\u7684\u6309\u952e\uff1b\u53d1\u751f\u6309\u952e\u64cd\u4f5c\u65f6\uff0c\u5b83\u5c06\u4e4b\u524d\u805a\u7126\u7684\u5b50\u9879\u7684tabindex<\/code>\u8bbe\u7f6e\u4e3a -1\uff0c\u5c06\u5f85\u805a\u7126\u5b50\u9879\u7684tabindex<\/code>\u8bbe\u7f6e\u4e3a 0\uff0c\u5e76\u5bf9\u5176\u8c03\u7528 focus \u65b9\u6cd5\u3002<\/p>\n
<radio-group<\/span>><\/span>\r\n  \/\/ Assuming the user pressed the down arrow, we'll focus the next available child\r\n  <radio-button<\/span> tabindex<\/span>=\"-1\"<\/span>><\/span>Water<\/radio-button<\/span>><\/span>\r\n  <radio-button<\/span> tabindex<\/span>=\"0\"<\/span>><\/span>Coffee<\/radio-button<\/span>><\/span> \/\/ call .focus() on this element\r\n  <radio-button<\/span> tabindex<\/span>=\"-1\"<\/span>><\/span>Tea<\/radio-button<\/span>><\/span>\r\n  <radio-button<\/span> tabindex<\/span>=\"-1\"<\/span>><\/span>Cola<\/radio-button<\/span>><\/span>\r\n  <radio-button<\/span> tabindex<\/span>=\"-1\"<\/span>><\/span>Ginger Ale<\/radio-button<\/span>><\/span>\r\n<\/radio-group<\/span>><\/span>\r\n<\/code><\/pre>\n
\u5f53\u7528\u6237\u5230\u8fbe\u6700\u540e\u4e00\u4e2a\uff08\u6216\u7b2c\u4e00\u4e2a\uff0c\u53d6\u51b3\u4e8e\u5176\u79fb\u52a8\u7126\u70b9\u7684\u65b9\u5411\uff09\u5b50\u9879\u65f6\uff0c\u5c06\u91cd\u65b0\u5faa\u73af\uff0c\u518d\u6b21\u805a\u7126\u7b2c\u4e00\u4e2a\uff08\u6216\u6700\u540e\u4e00\u4e2a\uff09\u5b50\u9879\u3002<\/p>\n
\u60a8\u53ef\u4ee5\u7528\u4e0b\u9762\u7684\u5df2\u5b8c\u6210\u793a\u4f8b\u8bd5\u4e00\u8bd5\u3002\u5728 DevTools \u4e2d\u68c0\u67e5\u8be5\u5143\u7d20\uff0c\u89c2\u5bdf tabindex \u4ece\u4e00\u4e2a\u5355\u9009\u6309\u94ae\u5230\u4e0b\u4e00\u5355\u9009\u6309\u94ae\u7684\u6d41\u52a8\u60c5\u51b5\u3002<\/p>\n
\u6a21\u6001\u7a97\u53e3\u548c\u952e\u76d8\u9677\u9631<\/h2>\n
\u5f53\u60a8\u7ba1\u7406\u7126\u70b9\u65f6\uff0c\u6709\u65f6\u4f1a\u53d1\u751f\u8fdb\u5165\u67d0\u79cd\u60c5\u5883\u540e\u65e0\u6cd5\u9000\u51fa\u7684\u60c5\u51b5\u3002 \u8bd5\u60f3\u6709\u8fd9\u6837\u4e00\u4e2a\u81ea\u52a8\u586b\u5145\u5c0f\u90e8\u4ef6\uff0c\u5b83\u8bd5\u56fe\u7ba1\u7406\u7126\u70b9\u548c\u6355\u83b7 Tab \u952e\u884c\u4e3a\uff0c\u4f46\u5728\u5b83\u5b8c\u6210\u64cd\u4f5c\u524d\u4f1a\u963b\u6b62\u7528\u6237\u79bb\u5f00\u3002\u8fd9\u79cd\u60c5\u51b5\u79f0\u4f5c\u952e\u76d8\u9677\u9631<\/em>\uff0c\u53ef\u80fd\u4ee4\u7528\u6237\u611f\u5230\u975e\u5e38\u61ca\u607c\u3002 Web AIM \u68c0\u67e5\u6e05\u5355\u7b2c 2.1.2 \u8282\u9610\u8ff0\u4e86\u8fd9\u4e2a\u95ee\u9898\uff0c\u6307\u51fa\u5728\u4efb\u4f55\u60c5\u51b5\u4e0b\u90fd\u4e0d\u5e94\u5c06\u952e\u76d8\u7126\u70b9\u9501\u5b9a\u6216\u56f0\u95ed\u5728\u4e00\u4e2a\u7279\u5b9a\u9875\u9762\u5143\u7d20\u5904<\/a>\u3002\u7528\u6237\u5e94\u8be5\u53ea\u4f7f\u7528\u952e\u76d8\u5c31\u80fd\u5728\u6240\u6709\u9875\u9762\u5143\u7d20\u4e2d\u53cc\u5411\u5bfc\u822a\u3002<\/p>\n
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