{"id":53506,"date":"2024-12-03T08:09:22","date_gmt":"2024-12-03T00:09:22","guid":{"rendered":"https:\/\/fwq.ai\/blog\/53506\/"},"modified":"2024-12-03T08:09:22","modified_gmt":"2024-12-03T00:09:22","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8-javascript-%e7%9b%91%e6%b5%8b%e5%85%83%e7%b4%a0%e6%bb%9a%e5%8a%a8%e4%bd%8d%e7%bd%ae%ef%bc%8c%e5%b9%b6%e5%88%a4%e6%96%ad%e5%85%b6%e9%a1%b6%e9%83%a8%e6%88%96","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/53506\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528 JavaScript \u76d1\u6d4b\u5143\u7d20\u6eda\u52a8\u4f4d\u7f6e\uff0c\u5e76\u5224\u65ad\u5176\u9876\u90e8\u6216\u5e95\u90e8\u662f\u5426\u4e0e\u9875\u9762\u53ef\u89c6\u533a\u57df\u9876\u90e8\u63a5\u89e6\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

\u5982\u4f55\u4f7f\u7528 JavaScript \u76d1\u6d4b\u5143\u7d20\u6eda\u52a8\u4f4d\u7f6e\uff0c\u5e76\u5224\u65ad\u5176\u9876\u90e8\u6216\u5e95\u90e8\u662f\u5426\u4e0e\u9875\u9762\u53ef\u89c6\u533a\u57df\u9876\u90e8\u63a5\u89e6\uff1f<\/h1>\n

\u6587\u7ae0<\/span>\u4e0d\u77e5\u9053\u5927\u5bb6\u662f\u5426\u719f\u6089\uff1f\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u4ecb\u7ecd\u300a\u5982\u4f55\u4f7f\u7528 JavaScript \u76d1\u6d4b\u5143\u7d20\u6eda\u52a8\u4f4d\u7f6e\uff0c\u5e76\u5224\u65ad\u5176\u9876\u90e8\u6216\u5e95\u90e8\u662f\u5426\u4e0e\u9875\u9762\u53ef\u89c6\u533a\u57df\u9876\u90e8\u63a5\u89e6\uff1f\u300b<\/span>\uff0c\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u4f1a\u8bb2\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u5728\u770b\u5b8c\u672c\u7bc7\u6587\u7ae0\u540e\uff0c\u6709\u66f4\u597d\u7684\u5efa\u8bae\u6216\u8005\u53d1\u73b0\u54ea\u91cc\u6709\u95ee\u9898\uff0c\u5e0c\u671b\u5927\u5bb6\u90fd\u80fd\u79ef\u6781\u8bc4\u8bba\u6307\u51fa\uff0c\u8c22\u8c22\uff01\u5e0c\u671b\u6211\u4eec\u80fd\u4e00\u8d77\u52a0\u6cb9\u8fdb\u6b65\uff01<\/p>\n

\"\u5982\u4f55\u4f7f\u7528<\/p>\n

\u76d1\u6d4b\u5143\u7d20\u6eda\u52a8\u4f4d\u7f6e<\/strong><\/p>\n

\u5982\u4f55\u901a\u8fc7 javascript \u76d1\u63a7\u5143\u7d20\u6eda\u52a8\u4f4d\u7f6e\uff1f\u4f8b\u5982\uff0c\u5f53\u67d0\u4e2a\u6bb5\u843d\u7684\u9876\u90e8\u6216\u5e95\u90e8\u4e0e\u9875\u9762\u53ef\u89c6\u533a\u57df\u9876\u90e8\u63a5\u89e6\u65f6\uff0c\u68c0\u6d4b\u5230\u6b64\u6bb5\u843d\u3002<\/p>\n

\u539f\u7406<\/strong><\/p>\n

intersection observer api<\/strong> \u63d0\u4f9b\u4e86\u4e00\u79cd\u65b9\u5f0f\u6765\u68c0\u6d4b\u5143\u7d20\u76f8\u5bf9\u4e8e\u5176\u7236\u5143\u7d20\u6216\u53ef\u89c6\u89c6\u53e3\u7684\u53ef\u89c1\u6027\u3002\u5b83\u5141\u8bb8\u5f00\u53d1\u8005\u5728\u5143\u7d20\u8fdb\u5165\u6216\u79bb\u5f00\u53ef\u89c6\u533a\u57df\u65f6\u63a5\u6536\u901a\u77e5\u3002<\/p>\n

\u4ee3\u7801\u5b9e\u73b0<\/strong><\/p>\n

\u4ee5\u4e0b\u4ee3\u7801\u4f7f\u7528 intersection observer api \u6765\u68c0\u6d4b\u6bb5\u843d\u7684\u6eda\u52a8\u4f4d\u7f6e\uff1a<\/p>\n

const paragraphs = document.querySelectorAll('div[dh]');\n\nconst observer = new IntersectionObserver((entries) => {\n  entries.forEach((entry) => {\n    console.log('entry', `${entry.target.getAttribute('dh')}`, entry.boundingClientRect.y);\n  });\n});\n\nparagraphs.forEach((paragraph) => {\n  observer.observe(paragraph);\n});<\/pre>\n
\u6548\u679c<\/strong><\/p>\n
\u6b64\u4ee3\u7801\u4f1a\u904d\u5386\u5177\u6709 dh \u5c5e\u6027\u7684\u6bb5\u843d\uff0c\u7136\u540e\u4e3a\u6bcf\u4e2a\u6bb5\u843d\u521b\u5efa intersection observer\u3002\u5f53\u6bb5\u843d\u8fdb\u5165\u6216\u79bb\u5f00\u53ef\u89c6\u533a\u57df\u65f6\uff0cobserver \u5c31\u4f1a\u53d1\u51fa\u901a\u77e5\uff0c\u5e76\u8bb0\u5f55\u6bb5\u843d\u7684 dh \u5c5e\u6027\uff08\u8868\u793a\u6bb5\u843d\u6807\u8bc6\uff09\u548c\u76f8\u5bf9\u4e8e\u9875\u9762\u53ef\u89c6\u533a\u57df\u9876\u90e8\u7684\u8ddd\u79bb\u3002<\/p>\n
\u8ddd\u79bb\u8ba1\u7b97<\/strong><\/p>\n
boundingclientrect.y \u4e3a\u76f8\u5bf9\u4e8e\u53ef\u89c6\u533a\u57df\u9876\u90e8\u7684\u8ddd\u79bb\uff1a<\/p>\n
    \n
  • \u6b63\u6570\u8868\u793a\u5143\u7d20\u53ef\u89c1\uff0c\u5e76\u5728\u53ef\u89c6\u533a\u57df\u4e0a\u65b9<\/li>\n
  • \u8d1f\u6570\u8868\u793a\u5143\u7d20\u4e0d\u53ef\u89c1\uff0c\u5e76\u5728\u53ef\u89c6\u533a\u57df\u4e0b\u65b9<\/li>\n<\/ul>\n
    \u5728\u5224\u65ad\u6bb5\u843d\u7684\u9876\u90e8\u6216\u5e95\u90e8\u662f\u5426\u4e0e\u9875\u9762\u53ef\u89c6\u533a\u57df\u9876\u90e8\u63a5\u89e6\u65f6\uff0c\u9700\u8981\u6839\u636e\u8ddd\u79bb\u503c\u7684\u6b63\u8d1f\u53f7\u8ba1\u7b97\u6700\u5c0f\u503c\u6216\u6700\u5927\u503c\uff1a<\/p>\n
      \n
    • \u90fd\u4e3a\u6b63\u6570\u65f6\uff0c\u53d6\u6700\u5c0f\u6b63\u6570<\/li>\n
    • \u90fd\u4e3a\u8d1f\u6570\u65f6\uff0c\u53d6\u6700\u5927\u8d1f\u6570<\/li>\n
    • \u5b58\u5728\u6b63\u8d1f\u6570\u65f6\uff0c\u53d6\u8d1f\u6570\u6700\u5927\u503c<\/li>\n<\/ul>\n
      \u4ee5\u4e0a\u5c31\u662f\u672c\u6587\u7684\u5168\u90e8\u5185\u5bb9\u4e86\uff0c\u662f\u5426\u6709\u987a\u5229\u5e2e\u52a9\u4f60\u89e3\u51b3\u95ee\u9898\uff1f\u82e5\u662f\u80fd\u7ed9\u4f60\u5e26\u6765\u5b66\u4e60\u4e0a\u7684\u5e2e\u52a9\uff0c\u8bf7\u5927\u5bb6\u591a\u591a\u652f\u6301\u7c73\u4e91\uff01\u66f4\u591a\u5173\u4e8e\u6587\u7ae0\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u4e5f\u53ef\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\u3002<\/p>\n
      \n
      <\/dt>\n
      \n   Win10\u84dd\u7259\u65e0\u6cd5\u8fde\u63a5\u8bbe\u5907\u600e\u4e48\u529e Win10\u84dd\u7259\u65e0\u6cd5\u8fde\u63a5\u8bbe\u5907\u89e3\u51b3\u65b9\u6cd5\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
      \u5982\u4f55\u4f7f\u7528 JavaScript \u76d1\u6d4b\u5143\u7d20\u6eda\u52a8\u4f4d\u7f6e\uff0c\u5e76\u5224\u65ad\u5176\u9876\u90e8\u6216\u5e95\u90e8\u662f\u5426\u4e0e\u9875\u9762\u53ef\u89c6\u533a\u57df\u9876\u90e8\u63a5\u89e6\uff1f \u6587\u7ae0\u4e0d\u77e5\u9053\u5927\u5bb6\u662f\u5426\u719f\u6089\uff1f\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u4ecb\u7ecd\u300a\u5982\u4f55\u4f7f\u7528 JavaScript \u76d1\u6d4b\u5143\u7d20\u6eda\u52a8\u4f4d\u7f6e\uff0c\u5e76\u5224\u65ad\u5176\u9876\u90e8\u6216\u5e95\u90e8\u662f\u5426\u4e0e\u9875\u9762\u53ef\u89c6\u533a\u57df\u9876\u90e8\u63a5\u89e6\uff1f\u300b\uff0c\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u4f1a\u8bb2\u5230\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u5728\u770b\u5b8c\u672c\u7bc7\u6587\u7ae0\u540e\uff0c\u6709\u66f4\u597d\u7684\u5efa\u8bae\u6216\u8005\u53d1\u73b0\u54ea\u91cc\u6709\u95ee\u9898\uff0c\u5e0c\u671b\u5927\u5bb6\u90fd\u80fd\u79ef\u6781\u8bc4\u8bba\u6307\u51fa\uff0c\u8c22\u8c22\uff01\u5e0c\u671b\u6211\u4eec\u80fd\u4e00\u8d77\u52a0\u6cb9\u8fdb\u6b65\uff01 \u76d1\u6d4b\u5143\u7d20\u6eda\u52a8\u4f4d\u7f6e \u5982\u4f55\u901a\u8fc7 javascript \u76d1\u63a7\u5143\u7d20\u6eda\u52a8\u4f4d\u7f6e\uff1f\u4f8b\u5982\uff0c\u5f53\u67d0\u4e2a\u6bb5\u843d\u7684\u9876\u90e8\u6216\u5e95\u90e8\u4e0e\u9875\u9762\u53ef\u89c6\u533a\u57df\u9876\u90e8\u63a5\u89e6\u65f6\uff0c\u68c0\u6d4b\u5230\u6b64\u6bb5\u843d\u3002 \u539f\u7406 intersection observer api \u63d0\u4f9b\u4e86\u4e00\u79cd\u65b9\u5f0f\u6765\u68c0\u6d4b\u5143\u7d20\u76f8\u5bf9\u4e8e\u5176\u7236\u5143\u7d20\u6216\u53ef\u89c6\u89c6\u53e3\u7684\u53ef\u89c1\u6027\u3002\u5b83\u5141\u8bb8\u5f00\u53d1\u8005\u5728\u5143\u7d20\u8fdb\u5165\u6216\u79bb\u5f00\u53ef\u89c6\u533a\u57df\u65f6\u63a5\u6536\u901a\u77e5\u3002 \u4ee3\u7801\u5b9e\u73b0 \u4ee5\u4e0b\u4ee3\u7801\u4f7f\u7528 intersection observer api \u6765\u68c0\u6d4b\u6bb5\u843d\u7684\u6eda\u52a8\u4f4d\u7f6e\uff1a const paragraphs = document.querySelectorAll(‘div[dh]’); const observer = new IntersectionObserver((entries) => { entries.forEach((entry) => { console.log(‘entry’, `${entry.target.getAttribute(‘dh’)}`, entry.boundingClientRect.y); }); }); paragraphs.forEach((paragraph) => { observer.observe(paragraph); }); \u6548\u679c \u6b64\u4ee3\u7801\u4f1a\u904d\u5386\u5177\u6709 dh \u5c5e\u6027\u7684\u6bb5\u843d\uff0c\u7136\u540e\u4e3a\u6bcf\u4e2a\u6bb5\u843d\u521b\u5efa intersection observer\u3002\u5f53\u6bb5\u843d\u8fdb\u5165\u6216\u79bb\u5f00\u53ef\u89c6\u533a\u57df\u65f6\uff0cobserver \u5c31\u4f1a\u53d1\u51fa\u901a\u77e5\uff0c\u5e76\u8bb0\u5f55\u6bb5\u843d\u7684 dh \u5c5e\u6027\uff08\u8868\u793a\u6bb5\u843d\u6807\u8bc6\uff09\u548c\u76f8\u5bf9\u4e8e\u9875\u9762\u53ef\u89c6\u533a\u57df\u9876\u90e8\u7684\u8ddd\u79bb\u3002 \u8ddd\u79bb\u8ba1\u7b97 […]<\/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-53506","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/53506","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=53506"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/53506\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=53506"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=53506"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=53506"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}