{"id":168185,"date":"2024-05-08T16:18:36","date_gmt":"2024-05-08T08:18:36","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/168185.html"},"modified":"2024-05-08T16:18:40","modified_gmt":"2024-05-08T08:18:40","slug":"javascript-%e4%b8%ad%e7%9a%84-attr-%e6%96%b9%e6%b3%95%e6%80%8e%e4%b9%88%e7%94%a8","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/168185.html","title":{"rendered":"javascript \u4e2d\u7684 attr \u65b9\u6cd5\u600e\u4e48\u7528"},"content":{"rendered":"

\"javascript<\/p>\n

JavaScript\u4e2d\u7684attr<\/code>\u65b9\u6cd5\u901a\u5e38\u662f\u6307\u5728\u4f7f\u7528jQuery\u5e93\u65f6\uff0c\u7528\u4e8e\u83b7\u53d6\u6216\u8bbe\u7f6eHTML\u5143\u7d20\u5c5e\u6027\u7684\u65b9\u6cd5\u3002\u901a\u8fc7attr<\/code>\u51fd\u6570\uff0c\u6211\u4eec\u53ef\u4ee5\u65b9\u4fbf\u5730\u5bf9\u5143\u7d20\u7684\u5c5e\u6027\u8fdb\u884c\u8bfb\u53d6\u6216\u4fee\u6539<\/strong>\u3001\u5b83\u7684\u7528\u6cd5\u5305\u62ec\u57fa\u672c\u7684\u8bfb\u53d6\u548c\u8bbe\u7f6e\u5c5e\u6027\u503c\uff0c\u4ee5\u53ca\u4f7f\u7528\u51fd\u6570\u6765\u52a8\u6001\u8bbe\u7f6e\u5c5e\u6027\u503c\u3002<\/p>\n<\/p>\n

\u8be6\u7ec6\u63cf\u8ff0\uff1a<\/p>\n

attr<\/code>\u65b9\u6cd5\u5728jQuery\u4e2d\u4f7f\u7528\u662f\u76f8\u5f53\u76f4\u63a5\u7684\uff1a\u8c03\u7528$(selector).attr(attributeName)<\/code>\u53ef\u4ee5\u83b7\u53d6\u6307\u5b9a\u5143\u7d20\u7684\u5c5e\u6027\u503c\uff0c\u5982\u679c\u8c03\u7528\u65f6\u52a0\u4e0a\u4e00\u4e2a\u503c\u4f5c\u4e3a\u7b2c\u4e8c\u4e2a\u53c2\u6570\uff0c\u5982$(selector).attr(attributeName, value)<\/code>\uff0c\u5219\u53ef\u4ee5\u8bbe\u7f6e\u8be5\u5143\u7d20\u7684\u5c5e\u6027\u503c\u3002\u6b64\u5916\uff0cattr<\/code>\u65b9\u6cd5\u8fd8\u80fd\u63a5\u6536\u4e00\u4e2a\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\uff0c\u5f53\u6211\u4eec\u9700\u8981\u6839\u636e\u5143\u7d20\u5f53\u524d\u72b6\u6001\u52a8\u6001\u8bbe\u7f6e\u5c5e\u6027\u65f6\uff0c\u8fd9\u4e00\u529f\u80fd\u5c31\u663e\u5f97\u975e\u5e38\u6709\u7528\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u57fa\u672c\u4f7f\u7528\u65b9\u6cd5<\/h3>\n<\/p>\n

\u83b7\u53d6\u5c5e\u6027\u503c<\/strong>\uff1a<\/p>\n

\u8981\u83b7\u53d6\u4e00\u4e2aHTML\u5143\u7d20\u7684\u5c5e\u6027\uff0c\u53ea\u9700\u8981\u5c06\u60f3\u8981\u83b7\u53d6\u7684\u5c5e\u6027\u540d\u79f0\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9attr<\/code>\u65b9\u6cd5\u3002\u5982\u83b7\u53d6\u56fe\u50cf\u7684src<\/code>\u5c5e\u6027\u503c\uff1a<\/p>\n<\/p>\n

var imgSrc = $('img').attr('src');<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8bbe\u7f6e\u5c5e\u6027\u503c<\/strong>\uff1a<\/p>\n
\u8981\u8bbe\u7f6e\u4e00\u4e2a\u6216\u591a\u4e2a\u5c5e\u6027\u503c\uff0c\u53ef\u4ee5\u4f20\u9012\u4e00\u4e2a\u5c5e\u6027\u540d\u79f0\u548c\u503c\uff0c\u6216\u8005\u4f20\u9012\u4e00\u4e2a\u5305\u542b\u591a\u4e2a\u5c5e\u6027-\u503c\u5bf9\u7684\u5bf9\u8c61\u7ed9attr<\/code>\u65b9\u6cd5\u3002\u5982\u8bbe\u7f6e\u56fe\u50cf\u7684src<\/code>\u5c5e\u6027\uff1a<\/p>\n<\/p>\n
$('img').attr('src', 'path\/to\/image.jpg');<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u6216\u8005\u540c\u65f6\u8bbe\u7f6e\u591a\u4e2a\u5c5e\u6027\uff1a<\/p>\n<\/p>\n
$('img').attr({<\/p>\n
  'src': 'path\/to\/image.jpg',<\/p>\n
  'alt': 'Description of image',<\/p>\n
  'title': 'Image Title'<\/p>\n
});<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e8c\u3001\u4f7f\u7528\u51fd\u6570\u52a8\u6001\u8bbe\u7f6e\u5c5e\u6027<\/h3>\n<\/p>\n
\u5229\u7528\u51fd\u6570\u8bbe\u7f6e\u5c5e\u6027\u503c<\/strong>\uff1a<\/p>\n
attr<\/code>\u65b9\u6cd5\u8fd8\u53ef\u4ee5\u63a5\u53d7\u4e00\u4e2a\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\u6765\u8bbe\u7f6e\u5c5e\u6027\u503c\uff0c\u8fd9\u4e2a\u51fd\u6570\u8fd4\u56de\u7684\u503c\u5c06\u7528\u6765\u8bbe\u7f6e\u5bf9\u5e94\u5c5e\u6027\u3002\u8fd9\u5728\u9700\u8981\u6839\u636e\u5143\u7d20\u5f53\u524d\u5c5e\u6027\u6216\u5176\u4ed6\u6761\u4ef6\u52a8\u6001\u8bbe\u7f6e\u5c5e\u6027\u65f6\u7279\u522b\u6709\u7528\uff1a<\/p>\n<\/p>\n
$('a').attr('href', function(i, origValue){<\/p>\n
  return origValue + '?timestamp=' + new Date().getTime();<\/p>\n
});<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u91cc\u5bf9\u6240\u6709<a><\/code>\u6807\u7b7e\u7684href<\/code>\u5c5e\u6027\u90fd\u9644\u52a0\u4e86\u4e00\u4e2a\u65f6\u95f4\u6233\u53c2\u6570\uff0ci<\/code>\u662f\u5143\u7d20\u7684\u7d22\u5f15\uff0corigValue<\/code>\u662f\u539f\u59cb\u7684href<\/code>\u5c5e\u6027\u503c\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u9ad8\u7ea7\u7528\u4f8b\u548c\u6ce8\u610f\u4e8b\u9879<\/h3>\n<\/p>\n
\u521b\u5efa\u65b0\u7684\u5c5e\u6027<\/strong>\uff1a<\/p>\n
\u5982\u679c\u5728\u4f7f\u7528attr<\/code>\u65b9\u6cd5\u8bbe\u7f6e\u5c5e\u6027\u65f6\uff0c\u8be5\u5c5e\u6027\u4e0d\u5b58\u5728\uff0c\u90a3\u4e48attr<\/code>\u5c06\u4f1a\u521b\u5efa\u8fd9\u4e2a\u65b0\u5c5e\u6027\u5e76\u8bbe\u7f6e\u5bf9\u5e94\u7684\u503c\u3002<\/p>\n<\/p>\n
\u79fb\u9664\u5c5e\u6027<\/strong>\uff1a<\/p>\n
\u9664\u4e86\u83b7\u53d6\u548c\u8bbe\u7f6e\u5c5e\u6027\u503c\u5916\uff0cattr<\/code>\u65b9\u6cd5\u4e5f\u53ef\u4ee5\u7528\u6765\u79fb\u9664\u5c5e\u6027\uff0c\u4f7f\u7528removeAttr<\/code>\u65b9\u6cd5\u5373\u53ef\u5220\u9664\u6307\u5b9a\u7684\u5c5e\u6027\uff1a<\/p>\n<\/p>\n
$('img').removeAttr('src');<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u5c06\u4f1a\u5220\u9664\u6240\u6709<img><\/code>\u5143\u7d20\u7684src<\/code>\u5c5e\u6027\u3002<\/p>\n<\/p>\n
\u6ce8\u610f\u4e8b\u9879<\/strong>\uff1a<\/p>\n
\u867d\u7136attr<\/code>\u65b9\u6cd5\u975e\u5e38\u5f3a\u5927\u548c\u7075\u6d3b\uff0c\u4f46\u5b83\u6709\u4e00\u5b9a\u7684\u5c40\u9650\u6027\u3002\u4f8b\u5982\uff0c\u5b83\u5e76\u4e0d\u9002\u7528\u4e8e\u8bbe\u7f6eproperty<\/code>\uff0c\u5982checked<\/code>\u3001selected<\/code>\u6216\u8005disabled<\/code>\u8fd9\u4e9b\uff0c\u5bf9\u4e8e\u8fd9\u4e9b\u5c5e\u6027\uff0c\u5e94\u5f53\u4f7f\u7528jQuery\u7684prop<\/code>\u65b9\u6cd5\u3002\u6b64\u5916\uff0c\u5728\u5904\u7406\u81ea\u5b9a\u4e49\u6570\u636e\u5c5e\u6027\u65f6\uff0c\u63a8\u8350\u4f7f\u7528data<\/code>\u65b9\u6cd5\u800c\u975eattr<\/code>\u3002<\/p>\n<\/p>\n
\u56db\u3001\u5b9e\u9645\u5e94\u7528\u793a\u4f8b<\/h3>\n<\/p>\n
\u6dfb\u52a0\u81ea\u5b9a\u4e49\u6570\u636e\u5c5e\u6027<\/strong>\uff1a<\/p>\n
\u5047\u8bbe\u4f60\u60f3\u8981\u7ed9\u4e00\u4e2a\u5143\u7d20\u6dfb\u52a0\u81ea\u5b9a\u4e49\u7684\u6570\u636e\u5c5e\u6027data-id<\/code>\uff1a<\/p>\n<\/p>\n
$('#element').attr('data-id', '123');<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u6761\u4ef6\u5224\u65ad\u540e\u8bbe\u7f6e\u5c5e\u6027<\/strong>\uff1a<\/p>\n
\u5982\u679c\u9700\u8981\u57fa\u4e8e\u6761\u4ef6\u6765\u8bbe\u7f6e\u5c5e\u6027\uff0c\u53ef\u4ee5\u8fd9\u4e48\u505a\uff1a<\/p>\n<\/p>\n
$('#element').attr('disabled', function(){<\/p>\n
  return !$(this).hasClass('enabled-class');<\/p>\n
});<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u94fe\u5f0f\u8c03\u7528<\/strong>\uff1a<\/p>\n
jQuery\u652f\u6301\u94fe\u5f0f\u8c03\u7528\uff0c\u6240\u4ee5\u4f60\u53ef\u4ee5\u5c06attr<\/code>\u65b9\u6cd5\u4e0e\u5176\u4ed6jQuery\u65b9\u6cd5\u7ed3\u5408\u4f7f\u7528\uff0c\u628a\u5b83\u4eec\u94fe\u63a5\u5728\u4e00\u8d77\uff1a<\/p>\n<\/p>\n
$('a')<\/p>\n
  .attr('target', '_blank')<\/p>\n
  .addClass('external-link')<\/p>\n
  .text('Click to open in a new window');<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\uff0c\u7075\u6d3b\u8fd0\u7528attr<\/code>\u65b9\u6cd5\u53ef\u4ee5\u6781\u5927\u5730\u63d0\u9ad8DOM\u64cd\u4f5c\u7684\u6548\u7387\u548c\u53ef\u7ef4\u62a4\u6027\u3002\u901a\u8fc7\u5bf9\u5c5e\u6027\u7684\u64cd\u4f5c\uff0c\u4f60\u80fd\u591f\u63a7\u5236\u5143\u7d20\u7684\u884c\u4e3a\u548c\u8868\u73b0\uff0c\u5b9e\u73b0\u66f4\u590d\u6742\u7684\u529f\u80fd\u3002\u4e0d\u8fc7\uff0c\u968f\u7740\u73b0\u4ee3\u7684\u524d\u7aef\u5f00\u53d1\u8d8b\u5411\u4e8e\u4f7f\u7528\u5982React\u3001Vue\u8fd9\u6837\u7684\u6570\u636e\u9a71\u52a8\u89c6\u56fe\u7684JavaScript\u6846\u67b6\uff0c\u76f4\u63a5\u7684DOM\u64cd\u4f5c\u548cattr<\/code>\u65b9\u6cd5\u7684\u4f7f\u7528\u4f1a\u9010\u6e10\u51cf\u5c11\u3002\u4e0d\u8fc7\u5728\u4f7f\u7528jQuery\u8fdb\u884cWeb\u5f00\u53d1\u65f6\uff0cattr<\/code>\u65b9\u6cd5\u4ecd\u7136\u662f\u4e00\u4e2a\u975e\u5e38\u6709\u7528\u7684\u5de5\u5177\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
1. \u5982\u4f55\u4f7f\u7528JavaScript\u7684attr\u65b9\u6cd5\u6765\u83b7\u53d6\u5143\u7d20\u5c5e\u6027\uff1f<\/strong><\/p>\n
attr\u65b9\u6cd5\u662fJavaScript\u4e2d\u7684\u4e00\u4e2a\u5e38\u7528\u65b9\u6cd5\uff0c\u7528\u4e8e\u83b7\u53d6\u5143\u7d20\u7684\u5c5e\u6027\u3002\u8981\u4f7f\u7528attr\u65b9\u6cd5\u6765\u83b7\u53d6\u5143\u7d20\u5c5e\u6027\uff0c\u60a8\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u8fdb\u884c\u64cd\u4f5c\uff1a<\/p>\n
    \n
  • \u9996\u5148\uff0c\u521b\u5efa\u4e00\u4e2a\u53d8\u91cf\u6765\u5b58\u50a8\u60a8\u8981\u83b7\u53d6\u5c5e\u6027\u7684\u5143\u7d20\u3002<\/li>\n
  • \u5176\u6b21\uff0c\u4f7f\u7528getElementById\u3001getElementsByClassName\u6216querySelector\u7b49\u65b9\u6cd5\u9009\u62e9\u60a8\u8981\u64cd\u4f5c\u7684\u5143\u7d20\u3002<\/li>\n
  • \u7136\u540e\uff0c\u4f7f\u7528attr\u65b9\u6cd5\u6765\u83b7\u53d6\u60a8\u60f3\u8981\u7684\u5c5e\u6027\u503c\uff0c\u65b9\u6cd5\u662f\u901a\u8fc7\u5143\u7d20\u53d8\u91cf\u540e\u52a0\u4e0a.getAttribute('\u5c5e\u6027\u540d')<\/code>\u3002<\/li>\n
  • \u6700\u540e\uff0c\u5c06\u83b7\u53d6\u5230\u7684\u5c5e\u6027\u503c\u5b58\u50a8\u5230\u53e6\u4e00\u4e2a\u53d8\u91cf\u4e2d\uff0c\u6216\u8005\u5bf9\u5176\u8fdb\u884c\u8fdb\u4e00\u6b65\u64cd\u4f5c\u548c\u4f7f\u7528\u3002<\/li>\n<\/ul>\n
    2. \u5982\u4f55\u4f7f\u7528JavaScript\u7684attr\u65b9\u6cd5\u6765\u8bbe\u7f6e\u5143\u7d20\u5c5e\u6027\uff1f<\/strong><\/p>\n
    \u9664\u4e86\u83b7\u53d6\u5143\u7d20\u5c5e\u6027\uff0cattr\u65b9\u6cd5\u8fd8\u53ef\u4ee5\u7528\u4e8e\u8bbe\u7f6e\u5143\u7d20\u7684\u5c5e\u6027\u3002\u8981\u4f7f\u7528attr\u65b9\u6cd5\u6765\u8bbe\u7f6e\u5143\u7d20\u5c5e\u6027\uff0c\u60a8\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u8fdb\u884c\u64cd\u4f5c\uff1a<\/p>\n
      \n
    • \u9996\u5148\uff0c\u4f7f\u7528getElementById\u3001getElementsByClassName\u6216querySelector\u7b49\u65b9\u6cd5\u9009\u62e9\u60a8\u8981\u64cd\u4f5c\u7684\u5143\u7d20\uff0c\u5e76\u5c06\u5176\u5b58\u50a8\u5230\u4e00\u4e2a\u53d8\u91cf\u4e2d\u3002<\/li>\n
    • \u5176\u6b21\uff0c\u4f7f\u7528attr\u65b9\u6cd5\u6765\u8bbe\u7f6e\u60a8\u60f3\u8981\u7684\u5c5e\u6027\u503c\uff0c\u65b9\u6cd5\u662f\u901a\u8fc7\u5143\u7d20\u53d8\u91cf\u540e\u52a0\u4e0a.setAttribute('\u5c5e\u6027\u540d', '\u5c5e\u6027\u503c')<\/code>\u3002<\/li>\n
    • \u7136\u540e\uff0c\u68c0\u67e5\u662f\u5426\u6210\u529f\u8bbe\u7f6e\u5c5e\u6027\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528attr\u65b9\u6cd5\u83b7\u53d6\u76f8\u540c\u5c5e\u6027\u7684\u503c\u6765\u9a8c\u8bc1\u3002<\/li>\n
    • \u6700\u540e\uff0c\u6839\u636e\u60a8\u7684\u9700\u6c42\uff0c\u53ef\u4ee5\u901a\u8fc7attr\u65b9\u6cd5\u8bbe\u7f6e\u591a\u4e2a\u4e0d\u540c\u7684\u5c5e\u6027\u503c\u3002<\/li>\n<\/ul>\n
      3. \u5982\u4f55\u4f7f\u7528JavaScript\u7684attr\u65b9\u6cd5\u6765\u5220\u9664\u5143\u7d20\u5c5e\u6027\uff1f<\/strong><\/p>\n
      \u9664\u4e86\u83b7\u53d6\u548c\u8bbe\u7f6e\u5143\u7d20\u5c5e\u6027\uff0cattr\u65b9\u6cd5\u8fd8\u53ef\u4ee5\u7528\u4e8e\u5220\u9664\u5143\u7d20\u7684\u5c5e\u6027\u3002\u8981\u4f7f\u7528attr\u65b9\u6cd5\u6765\u5220\u9664\u5143\u7d20\u5c5e\u6027\uff0c\u60a8\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u8fdb\u884c\u64cd\u4f5c\uff1a<\/p>\n
        \n
      • \u9996\u5148\uff0c\u4f7f\u7528getElementById\u3001getElementsByClassName\u6216querySelector\u7b49\u65b9\u6cd5\u9009\u62e9\u60a8\u8981\u64cd\u4f5c\u7684\u5143\u7d20\uff0c\u5e76\u5c06\u5176\u5b58\u50a8\u5230\u4e00\u4e2a\u53d8\u91cf\u4e2d\u3002<\/li>\n
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