{"id":2683,"date":"2024-11-10T13:50:13","date_gmt":"2024-11-10T05:50:13","guid":{"rendered":"https:\/\/fwq.ai\/blog\/2683\/"},"modified":"2024-11-10T13:50:13","modified_gmt":"2024-11-10T05:50:13","slug":"nodelist-%e4%b8%8e-htmlcollection%ef%bc%9a%e5%ae%9e%e6%97%b6%e9%9b%86%e5%90%88%e5%92%8c%e9%9d%99%e6%80%81%e9%9b%86%e5%90%88%e4%b9%8b%e9%97%b4%e7%9a%84%e5%8c%ba%e5%88%ab","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/2683\/","title":{"rendered":"NodeList \u4e0e HTMLCollection\uff1a\u5b9e\u65f6\u96c6\u5408\u548c\u9759\u6001\u96c6\u5408\u4e4b\u95f4\u7684\u533a\u522b"},"content":{"rendered":"

\u6211\u4eec\u5c06\u8be6\u7ec6\u7814\u7a76nodelist<\/strong>\u548chtmlcollection<\/strong>\u4ee5\u53canodelist\u548chtmlcollection\u3002<\/strong><\/p>\n

\u9996\u5148\uff0c\u4e24\u8005\u90fd\u6709\u4e00\u4e2a length \u5c5e\u6027\uff0c\u8fd4\u56de\u5217\u8868\uff08\u96c6\u5408\uff09\u4e2d\u7684\u5143\u7d20\u6570\u91cf\u3002<\/p>\n

\n

1.html\u96c6\u5408 <\/h2>\n

html dom \u4e2d\u7684 <\/p>\n

htmlcollection<\/strong> \u5df2\u4e0a\u7ebf\uff1b getelementsbyclassname()<\/strong> \u6216 getelementsbytagname()<\/strong> \u8fd4\u56de\u4e00\u4e2a\u5b9e\u65f6 htmlcollection<\/strong> \uff0c\u8868\u793a\u5177\u6709\u6240\u6709\u7ed9\u5b9a \u7c7b\u540d\u79f0\u7684\u6240\u6709\u5b50\u5143\u7d20\u7684\u7c7b\u4f3c\u6570\u7ec4\u7684\u5bf9\u8c61<\/strong>.<\/p>\n

\u793a\u4f8b<\/strong> :<\/p>\n

<!doctype html>\n<html lang=\"en\">\n<head>\n    <meta charset=\"utf-8\">\n    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n    <title>nodelist and htmlcollection<\/title>\n<\/head>\n<body>\n      <ul class=\"items\">\n        <li>item-1<\/li>\n        <li>item-2<\/li>\n        <li>item-3<\/li>\n        <li>item-4<\/li>\n      <\/ul>\n      <ul class=\"items\">\n        <li>item-5<\/li>\n        <li>item-6<\/li>\n        <li>item-7<\/li>\n        <li>item-8<\/li>\n      <\/ul>\n      <ul class=\"items\">\n        <li>item-9<\/li>\n        <li>item-10<\/li>\n        <li>item-11<\/li>\n        <li>item-12<\/li>\n      <\/ul>\n    <script src=\"\/script.js\"><\/script>\n<\/body>\n<\/html>\n\n<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
const selected = document.getelementsbyclassname(\"items\")\nconsole.log(selected)\n<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u8f93\u51fa<\/strong> : <\/p>\n
\"NodeList<\/p>\n
\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n
\n
\u5f53\u5e95\u5c42\u6587\u6863\u66f4\u6539\u65f6\uff0chtmlcollection \u4f1a\u81ea\u52a8\u66f4\u65b0<\/strong>\u3002<\/p>\n
\u8ba9\u6211\u4eec\u5199\u4e00\u4e2a\u793a\u4f8b<\/strong> :<\/p>\n
<!doctype html>\n<html lang=\"en\">\n<head>\n    <meta charset=\"utf-8\">\n    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n    <title>nodelist and htmlcollection<\/title>\n<\/head>\n<body>\n    <div class=\"card\" >\n        <div class=\"card-body\" id=\"main\">\n          <h5 class=\"card-title\">dev community<\/h5>\n          <p class=\"card-text\">dev community sonay kara<\/p>\n          <a href=\"#\" class=\"btn btn-primary\">dev community sonay kara<\/a>\n        <\/div>\n      <\/div>\n\n    <script src=\"\/script.js\"><\/script>\n<\/body>\n<\/html>\n\n<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
const selected = document.getelementsbyclassname(\"card\")\nconsole.log(selected)\nselected[0].innerhtml += `<li class=\"card\">dev.to<\/li>`;\nconsole.log(selected)\n\n<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u8f93\u51fa<\/strong> : <\/p>\n
\"NodeList<\/p>\n
\u4ece\u8f93\u51fa\u4e2d\u53ef\u4ee5\u770b\u51fa\uff0c\u5f53\u5c06\u65b0\u7684 html \u6807\u7b7e\u6dfb\u52a0\u5230\u5177\u6709\u5361\u7247\u7c7b\u7684\u5143\u7d20\u65f6\uff0chtmlcollection<\/strong> \u4f1a\u66f4\u65b0\u56e0\u4e3a\u5b83\u662f\u6d3b\u52a8\u7684<\/strong><\/p>\n
\n
 2. \u8282\u70b9\u5217\u8868 <\/h2>\n
queryselectorall()<\/strong> \u8fd4\u56de\u4e00\u4e2a static<\/strong> \uff08\u975e\u5b9e\u65f6\uff09<\/strong> nodelist<\/strong> \u8868\u793a\u4e0e\u6307\u5b9a\u7ec4\u5339\u914d\u7684\u6587\u6863\u5143\u7d20\u5217\u8868\u9009\u62e9\u5668\u3002\u4f46\u662f childnodes<\/strong> \u8fd4\u56de\u4e00\u4e2a live nodelist<\/strong>\u3002 <\/p>\n
\u793a\u4f8b<\/strong> :<\/p>\n
<!doctype html>\n<html lang=\"en\">\n<head>\n    <meta charset=\"utf-8\">\n    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n    <title>nodelist and htmlcollection<\/title>\n<\/head>\n<body>\n      <ul class=\"items\">\n        <li>item-1<\/li>\n        <li>item-2<\/li>\n        <li>item-3<\/li>\n        <li>item-4<\/li>\n      <\/ul>\n      <ul class=\"items\">\n        <li>item-5<\/li>\n        <li>item-6<\/li>\n        <li>item-7<\/li>\n        <li>item-8<\/li>\n      <\/ul>\n      <ul class=\"items\">\n        <li>item-9<\/li>\n        <li>item-10<\/li>\n        <li>item-11<\/li>\n        <li>item-12<\/li>\n      <\/ul>\n    <script src=\"\/script.js\"><\/script>\n<\/body>\n<\/html>\n\n<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
const selected = document.queryselectorall(\".items\")\nconsole.log(selected)\n\n<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u8f93\u51fa<\/strong> : <\/p>\n
\"NodeList<\/p>\n
\n
\u5f53\u5bf9\u5e95\u5c42\u6587\u6863\u8fdb\u884c\u66f4\u6539\u65f6\uff0cqueryselectorall()<\/strong> \u8fd4\u56de\u7684 nodelist<\/strong> \u4e0d\u4f1a\u81ea\u52a8\u66f4\u65b0\uff0c\u56e0\u4e3a \u5b83\u662f\u975e\u6d3b\u52a8\u7684<\/strong>\u3002<\/p>\n
\u8ba9\u6211\u4eec\u5199\u4e00\u4e2a\u793a\u4f8b<\/strong> :<\/p>\n
<!doctype html>\n<html lang=\"en\">\n<head>\n    <meta charset=\"utf-8\">\n    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n    <title>nodelist and htmlcollection<\/title>\n<\/head>\n<body>\n    <div class=\"card\" >\n        <div class=\"card-body\" id=\"main\">\n          <h5 class=\"card-title\">dev community<\/h5>\n          <p class=\"card-text\">dev community sonay kara<\/p>\n          <a href=\"#\" class=\"btn btn-primary\">dev community sonay kara<\/a>\n        <\/div>\n      <\/div>\n\n    <script src=\"\/script.js\"><\/script>\n<\/body>\n<\/html>\n\n<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
const selected = document.queryselectorall(\".card\")\nselected[0].innerhtml += `<li class=\"card\">dev.to<\/li>`;\nconsole.log(selected)\n<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u8f93\u51fa<\/strong> : <\/p>\n
    \n
  •  \u6d4f\u89c8\u5668<\/strong> <\/li>\n<\/ul>\n
    \"NodeList<\/p>\n
      \n
    •  \u63a7\u5236\u53f0<\/strong> <\/li>\n<\/ul>\n
      \"NodeList<\/p>\n
      \u4ece\u8f93\u51fa\u4e2d\u53ef\u4ee5\u770b\u51fa\uff0c\u5f53\u5c06\u65b0\u7684 html \u6807\u7b7e\u6dfb\u52a0\u5230\u5177\u6709\u5361\u7247\u7c7b\u7684\u5143\u7d20\u65f6\uff0c\u6d4f\u89c8\u5668\u4f1a\u66f4\u65b0\uff0c\u4f46 nodelist<\/strong> \u4e0d\u4f1a\u66f4\u65b0\uff0c\u56e0\u4e3a nodelist \u4e0d\u6d3b\u52a8<\/strong>.<\/p>\n
      \n
      \u5f53\u5e95\u5c42\u6587\u6863\u53d1\u751f\u66f4\u6539\u65f6\uff0cchildnodes<\/strong> \u8fd4\u56de\u7684 nodelist \u4f1a\u81ea\u52a8\u66f4\u65b0\uff0c\u56e0\u4e3a\u5b83\u662f\u6d3b\u52a8\u7684<\/strong>\u3002<\/p>\n
      \u793a\u4f8b<\/strong> :<\/p>\n
      <!doctype html>\n<html lang=\"en\">\n<head>\n    <meta charset=\"utf-8\">\n    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n    <title>nodelist and htmlcollection<\/title>\n<\/head>\n<body>\n    <div class=\"card\" >\n        <div class=\"card-body\" id=\"main\">\n          <h5 class=\"card-title\">dev community<\/h5>\n          <p class=\"card-text\">dev community sonay kara<\/p>\n          <a href=\"#\" class=\"btn btn-primary\">dev community sonay kara<\/a>\n        <\/div>\n      <\/div>\n\n    <script src=\"\/script.js\"><\/script>\n<\/body>\n<\/html>\n<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      const selected = document.querySelector(\".card\")\nselected.innerHTML += `<li class=\"card\">dev.to<\/li>`;\nconsole.log(selected.childNodes)\n\n<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \u8f93\u51fa<\/strong> : <\/p>\n
      \"NodeList<\/p>\n
      \u4ece\u8f93\u51fa\u4e2d\u53ef\u4ee5\u770b\u51fa\uff0c\u5f53\u4e00\u4e2a\u65b0\u7684 html \u6807\u7b7e\u6dfb\u52a0\u5230\u5177\u6709\u5361\u7247\u7c7b\u7684\u5143\u7d20\u65f6\uff0cnodelist<\/strong> \u4f1a\u66f4\u65b0\u56e0\u4e3a\u5b83\u662f\u6d3b\u52a8\u7684<\/strong>\u3002<\/p>\n
      \n
       \u7ed3\u8bba <\/h2>\n
      \u603b\u4e4b\uff0chtmlcollection \u59cb\u7ec8\u662f\u4e00\u4e2a\u5b9e\u65f6\u96c6\u5408\u3002 nodelist \u901a\u5e38\u662f\u9759\u6001\u96c6\u5408\u3002<\/strong><\/p>\n
      \u6211\u4eec\u68c0\u67e5\u4e86 nodelist<\/strong> \u548c htmlcollection<\/strong> \u662f\u4ec0\u4e48\u3002\u73b0\u5728\u60a8\u77e5\u9053\u4ec0\u4e48\u662f nodelist \u548c htmlcollection<\/strong> \u4e86\u3002<\/p>\n
      \u4ee5\u4e0a\u5c31\u662fNodeList \u4e0e HTMLCollection\uff1a\u5b9e\u65f6\u96c6\u5408\u548c\u9759\u6001\u96c6\u5408\u4e4b\u95f4\u7684\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
      \u6211\u4eec\u5c06\u8be6\u7ec6\u7814\u7a76nodelist\u548chtmlcollection\u4ee5\u53canodelist\u548chtmlcollection\u3002 \u9996\u5148\uff0c\u4e24\u8005\u90fd\u6709\u4e00\u4e2a length \u5c5e\u6027\uff0c\u8fd4\u56de\u5217\u8868\uff08\u96c6\u5408\uff09\u4e2d\u7684\u5143\u7d20\u6570\u91cf\u3002 1.html\u96c6\u5408 html dom \u4e2d\u7684 htmlcollection \u5df2\u4e0a\u7ebf\uff1b getelementsbyclassname() \u6216 getelementsbytagname() \u8fd4\u56de\u4e00\u4e2a\u5b9e\u65f6 htmlcollection \uff0c\u8868\u793a\u5177\u6709\u6240\u6709\u7ed9\u5b9a \u7c7b\u540d\u79f0\u7684\u6240\u6709\u5b50\u5143\u7d20\u7684\u7c7b\u4f3c\u6570\u7ec4\u7684\u5bf9\u8c61. \u793a\u4f8b : <!doctype html> <html lang=”en”> <head> <meta charset=”utf-8″> <meta name=”viewport” content=”width=device-width, initial-scale=1.0″> <title>nodelist and htmlcollection<\/title> <\/head> <body> <ul class=”items”> <li>item-1<\/li> <li>item-2<\/li> <li>item-3<\/li> <li>item-4<\/li> <\/ul> <ul class=”items”> <li>item-5<\/li> <li>item-6<\/li> <li>item-7<\/li> <li>item-8<\/li> <\/ul> <ul class=”items”> <li>item-9<\/li> <li>item-10<\/li> <li>item-11<\/li> <li>item-12<\/li> […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-2683","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/2683","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=2683"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/2683\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=2683"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=2683"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=2683"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}