{"id":2155,"date":"2025-03-01T00:23:13","date_gmt":"2025-02-28T16:23:13","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=2155"},"modified":"2025-03-01T00:23:13","modified_gmt":"2025-02-28T16:23:13","slug":"javascript-cookie","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/03\/01\/javascript-cookie\/","title":{"rendered":"JavaScript Cookie"},"content":{"rendered":"\n

\u5728 Web \u5f00\u53d1\u4e2d\uff0cCookie<\/strong> \u662f\u4e00\u79cd\u5728\u7528\u6237\u7684\u6d4f\u89c8\u5668\u4e2d\u5b58\u50a8\u5c11\u91cf\u6570\u636e\u7684\u673a\u5236\u3002Cookie \u6570\u636e\u901a\u5e38\u7528\u4e8e\u5b58\u50a8\u7528\u6237\u7684\u504f\u597d\u8bbe\u7f6e\u3001\u767b\u5f55\u4fe1\u606f\u3001\u4f1a\u8bdd\u72b6\u6001\u7b49\u3002JavaScript \u63d0\u4f9b\u4e86\u64cd\u4f5c Cookie \u7684\u80fd\u529b\uff0c\u53ef\u4ee5\u8bbe\u7f6e\u3001\u8bfb\u53d6\u548c\u5220\u9664 Cookie\u3002<\/p>\n\n\n\n

1. Cookie \u7684\u57fa\u672c\u6982\u5ff5<\/strong><\/h3>\n\n\n\n

Cookie \u662f\u7531\u670d\u52a1\u5668\u53d1\u9001\u7ed9\u6d4f\u89c8\u5668\uff0c\u5e76\u4e14\u5728\u6d4f\u89c8\u5668\u4e0e\u670d\u52a1\u5668\u4e4b\u95f4\u7684\u540e\u7eed\u8bf7\u6c42\u4e2d\u81ea\u52a8\u9644\u52a0\u7684\u5c11\u91cf\u6570\u636e\u3002\u6bcf\u4e2a Cookie \u90fd\u5305\u542b\u4ee5\u4e0b\u51e0\u90e8\u5206\u4fe1\u606f\uff1a<\/p>\n\n\n\n

    \n
  • \u540d\u79f0<\/strong>\uff1aCookie \u7684\u540d\u79f0\u3002<\/li>\n\n\n\n
  • \u503c<\/strong>\uff1aCookie \u7684\u503c\u3002<\/li>\n\n\n\n
  • \u8fc7\u671f\u65f6\u95f4<\/strong>\uff1aCookie \u7684\u6709\u6548\u671f\uff0c\u8fc7\u671f\u540e\u5c06\u88ab\u5220\u9664\u3002<\/li>\n\n\n\n
  • \u8def\u5f84<\/strong>\uff1a\u5b9a\u4e49\u8be5 Cookie \u53ef\u8bbf\u95ee\u7684\u8def\u5f84\u3002<\/li>\n\n\n\n
  • \u57df<\/strong>\uff1a\u5b9a\u4e49\u8be5 Cookie \u53ef\u8bbf\u95ee\u7684\u57df\u3002<\/li>\n\n\n\n
  • \u5b89\u5168\u6807\u5fd7<\/strong>\uff1a\u5982\u679c\u8bbe\u7f6e\u4e86\u6b64\u6807\u5fd7\uff0c\u5219 Cookie \u53ea\u80fd\u901a\u8fc7 HTTPS \u534f\u8bae\u8fdb\u884c\u8bbf\u95ee\u3002<\/li>\n<\/ul>\n\n\n\n

    2. \u8bbe\u7f6e Cookie<\/strong><\/h3>\n\n\n\n

    \u5728 JavaScript \u4e2d\uff0c\u4f7f\u7528 document.cookie<\/code> \u6765\u8bbe\u7f6e Cookie\u3002\u8bbe\u7f6e\u65f6\uff0cCookie \u7684\u683c\u5f0f\u4e3a \"name=value\"<\/code>\uff0c\u53ef\u4ee5\u9644\u52a0\u5176\u4ed6\u5c5e\u6027\uff0c\u4f8b\u5982 expires<\/code>\uff08\u8fc7\u671f\u65f6\u95f4\uff09\u3001path<\/code>\uff08\u8def\u5f84\uff09\u7b49\u3002<\/p>\n\n\n\n

    \u57fa\u672c\u8bed\u6cd5\uff1a<\/strong><\/p>\n\n\n\n

    document.cookie = \"name=value\";<\/code><\/pre>\n\n\n\n
    \u793a\u4f8b\uff1a<\/strong><\/p>\n\n\n\n
    document.cookie = \"username=JohnDoe\";<\/code><\/pre>\n\n\n\n
    \u8fd9\u5c06\u8bbe\u7f6e\u4e00\u4e2a\u540d\u4e3a username<\/code> \u7684 Cookie\uff0c\u503c\u4e3a JohnDoe<\/code>\u3002<\/p>\n\n\n\n
    3. \u8bbe\u7f6e\u5e26\u6709\u8fc7\u671f\u65f6\u95f4\u7684 Cookie<\/strong><\/h3>\n\n\n\n
    Cookie \u9ed8\u8ba4\u7684\u8fc7\u671f\u65f6\u95f4\u662f\u5f53\u524d\u4f1a\u8bdd\u7ed3\u675f\u65f6\uff08\u6d4f\u89c8\u5668\u5173\u95ed\u65f6\uff09\u3002\u5982\u679c\u5e0c\u671b Cookie \u5728\u4e00\u5b9a\u65f6\u95f4\u540e\u8fc7\u671f\uff0c\u53ef\u4ee5\u8bbe\u7f6e expires<\/code> \u5c5e\u6027\u3002<\/p>\n\n\n\n
    \u8bed\u6cd5\uff1a<\/strong><\/p>\n\n\n\n
    document.cookie = \"name=value; expires=expiration_date\";<\/code><\/pre>\n\n\n\n
    expires<\/code> \u5c5e\u6027\u7684\u503c\u662f\u4e00\u4e2a UTC \u683c\u5f0f\u7684\u65e5\u671f\u5b57\u7b26\u4e32\u3002\u53ef\u4ee5\u4f7f\u7528 JavaScript \u52a8\u6001\u751f\u6210\u8fc7\u671f\u65e5\u671f\u3002<\/p>\n\n\n\n
    \u793a\u4f8b\uff1a<\/strong><\/p>\n\n\n\n
    let expirationDate = new Date();\nexpirationDate.setMinutes(expirationDate.getMinutes() + 10);  \/\/ \u8bbe\u7f6e10\u5206\u949f\u540e\u8fc7\u671f\ndocument.cookie = \"username=JohnDoe; expires=\" + expirationDate.toUTCString();<\/code><\/pre>\n\n\n\n
    \u8be5 Cookie \u4f1a\u5728 10 \u5206\u949f\u540e\u8fc7\u671f\u3002<\/p>\n\n\n\n
    4. \u8bbe\u7f6e Cookie \u7684\u8def\u5f84\u548c\u57df<\/strong><\/h3>\n\n\n\n
    \u901a\u8fc7 path<\/code> \u548c domain<\/code> \u5c5e\u6027\uff0c\u53ef\u4ee5\u63a7\u5236 Cookie \u7684\u4f5c\u7528\u8303\u56f4\u3002<\/p>\n\n\n\n
      \n
    • path<\/strong>\uff1a\u6307\u5b9a Cookie \u53ef\u7528\u7684\u8def\u5f84\u3002\u9ed8\u8ba4\u503c\u662f\u5f53\u524d\u9875\u9762\u7684\u8def\u5f84\u3002<\/li>\n\n\n\n
    • domain<\/strong>\uff1a\u6307\u5b9a Cookie \u53ef\u7528\u7684\u57df\u540d\u3002\u53ef\u4ee5\u4f7f Cookie \u5728\u591a\u4e2a\u5b50\u57df\u4e4b\u95f4\u5171\u4eab\u3002<\/li>\n<\/ul>\n\n\n\n
      \u793a\u4f8b\uff1a<\/strong><\/p>\n\n\n\n
      document.cookie = \"username=JohnDoe; path=\/; domain=example.com\";<\/code><\/pre>\n\n\n\n
      \u8fd9\u4e2a Cookie \u53ef\u4ee5\u5728 example.com<\/code> \u57df\u540d\u4e0b\u7684\u6240\u6709\u9875\u9762\u4e2d\u4f7f\u7528\u3002<\/p>\n\n\n\n
      5. \u8bbe\u7f6e\u5b89\u5168 Cookie<\/strong><\/h3>\n\n\n\n
      \u5982\u679c\u7f51\u7ad9\u4f7f\u7528 HTTPS \u534f\u8bae\uff0c\u4f60\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e Secure<\/code> \u6807\u5fd7\uff0c\u786e\u4fdd Cookie \u4ec5\u901a\u8fc7 HTTPS \u4f20\u8f93\u3002<\/p>\n\n\n\n
      \u793a\u4f8b\uff1a<\/strong><\/p>\n\n\n\n
      document.cookie = \"username=JohnDoe; secure\";<\/code><\/pre>\n\n\n\n
      \u8be5 Cookie \u4ec5\u5728 HTTPS \u8fde\u63a5\u65f6\u4f20\u8f93\u3002<\/p>\n\n\n\n
      6. \u8bfb\u53d6 Cookie<\/strong><\/h3>\n\n\n\n
      \u53ef\u4ee5\u901a\u8fc7 document.cookie<\/code> \u6765\u8bfb\u53d6\u6d4f\u89c8\u5668\u4e2d\u7684\u6240\u6709 Cookie\u3002\u8fd4\u56de\u7684\u5b57\u7b26\u4e32\u662f\u6240\u6709 Cookie \u7684\u96c6\u5408\uff0c\u683c\u5f0f\u4e3a name=value<\/code> \u7684\u5bf9\u591a\u4e2a Cookie \u7528\u5206\u53f7\u548c\u7a7a\u683c\u5206\u9694\u3002<\/p>\n\n\n\n
      \u8bed\u6cd5\uff1a<\/strong><\/p>\n\n\n\n
      let cookies = document.cookie;\nconsole.log(cookies);<\/code><\/pre>\n\n\n\n
      \u793a\u4f8b\uff1a<\/strong><\/p>\n\n\n\n
      let cookies = document.cookie;\nconsole.log(cookies);  \/\/ \u8f93\u51fa\uff1ausername=JohnDoe; session_id=123456<\/code><\/pre>\n\n\n\n
      \u5982\u679c\u9700\u8981\u8bfb\u53d6\u5355\u4e2a Cookie \u7684\u503c\uff0c\u53ef\u4ee5\u901a\u8fc7\u89e3\u6790 document.cookie<\/code> \u6765\u5b9e\u73b0\u3002<\/p>\n\n\n\n
      \u8bfb\u53d6\u5355\u4e2a Cookie \u793a\u4f8b\uff1a<\/strong><\/p>\n\n\n\n
      function getCookie(name) {\n  let cookieArr = document.cookie.split(\"; \");\n  for (let i = 0; i < cookieArr.length; i++) {\n    let cookiePair = cookieArr[i].split(\"=\");\n    if (cookiePair[0] === name) {\n      return decodeURIComponent(cookiePair[1]);\n    }\n  }\n  return null;\n}\n\nlet username = getCookie(\"username\");\nconsole.log(username);  \/\/ \u8f93\u51fa\uff1aJohnDoe<\/code><\/pre>\n\n\n\n
      7. \u5220\u9664 Cookie<\/strong><\/h3>\n\n\n\n
      \u8981\u5220\u9664 Cookie\uff0c\u53ef\u4ee5\u8bbe\u7f6e\u5176\u8fc7\u671f\u65f6\u95f4\u4e3a\u8fc7\u53bb\u7684\u65e5\u671f\uff0c\u6216\u8005\u76f4\u63a5\u901a\u8fc7 expires<\/code> \u8bbe\u7f6e\u4e3a\u5df2\u7ecf\u8fc7\u671f\u7684\u65f6\u95f4\u3002<\/p>\n\n\n\n
      \u793a\u4f8b\uff1a<\/strong><\/p>\n\n\n\n
      document.cookie = \"username=; expires=Thu, 01 Jan 1970 00:00:00 UTC; path=\/\";<\/code><\/pre>\n\n\n\n
      \u8fd9\u4f1a\u5220\u9664 username<\/code> Cookie\u3002\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u4e3a 1970 \u5e74 1 \u6708 1 \u65e5\u662f\u4e00\u4e2a\u5e38\u89c1\u7684\u5220\u9664 Cookie \u7684\u6280\u5de7\u3002<\/p>\n\n\n\n
      8. Cookie \u793a\u4f8b\u5e94\u7528<\/strong><\/h3>\n\n\n\n
        \n
      1. \u8bbe\u7f6e\u7528\u6237\u7684\u767b\u5f55\u72b6\u6001<\/strong><\/li>\n<\/ol>\n\n\n\n
        function setLoginStatus(username) {\n  let expirationDate = new Date();\n  expirationDate.setMinutes(expirationDate.getMinutes() + 30);  \/\/ \u8bbe\u7f6e30\u5206\u949f\u540e\u8fc7\u671f\n  document.cookie = \"username=\" + username + \"; expires=\" + expirationDate.toUTCString() + \"; path=\/\";\n}\n\nsetLoginStatus(\"JohnDoe\");  \/\/ \u8bbe\u7f6e\u7528\u6237\u767b\u5f55\u72b6\u6001<\/code><\/pre>\n\n\n\n
          \n
        1. \u8bfb\u53d6\u5e76\u663e\u793a\u7528\u6237\u7684\u540d\u5b57<\/strong><\/li>\n<\/ol>\n\n\n\n
          function displayUsername() {\n  let username = getCookie(\"username\");\n  if (username) {\n    alert(\"Welcome back, \" + username);\n  } else {\n    alert(\"Welcome, new user!\");\n  }\n}\n\ndisplayUsername();  \/\/ \u663e\u793a\u6b22\u8fce\u6d88\u606f<\/code><\/pre>\n\n\n\n
            \n
          1. \u81ea\u52a8\u767b\u5f55\u529f\u80fd<\/strong><\/li>\n<\/ol>\n\n\n\n
            function autoLogin() {\n  let username = getCookie(\"username\");\n  if (username) {\n    alert(\"Welcome back, \" + username);\n    \/\/ \u81ea\u52a8\u767b\u5f55\u903b\u8f91...\n  } else {\n    alert(\"Please log in.\");\n  }\n}\n\nautoLogin();  \/\/ \u6267\u884c\u81ea\u52a8\u767b\u5f55\u903b\u8f91<\/code><\/pre>\n\n\n\n
            9. Cookie \u7684\u9650\u5236<\/strong><\/h3>\n\n\n\n
              \n
            • \u5927\u5c0f\u9650\u5236<\/strong>\uff1a\u6bcf\u4e2a Cookie \u7684\u5927\u5c0f\u901a\u5e38\u4e0d\u80fd\u8d85\u8fc7 4KB\u3002<\/li>\n\n\n\n
            • \u6570\u91cf\u9650\u5236<\/strong>\uff1a\u6d4f\u89c8\u5668\u5bf9\u4e8e\u6bcf\u4e2a\u57df\u540d\u7684 Cookie \u6570\u91cf\u6709\u9650\u5236\uff0c\u901a\u5e38\u4e3a 20 \u4e2a\u5de6\u53f3\u3002<\/li>\n\n\n\n
            • \u5b89\u5168\u6027<\/strong>\uff1aCookie \u6570\u636e\u4e0d\u52a0\u5bc6\u5b58\u50a8\uff0c\u654f\u611f\u4fe1\u606f\uff08\u5982\u5bc6\u7801\uff09\u4e0d\u5e94\u5b58\u50a8\u5728 Cookie \u4e2d\u3002\u4f7f\u7528 Secure<\/code> \u548c HttpOnly<\/code> \u5c5e\u6027\u589e\u52a0\u5b89\u5168\u6027\u3002<\/li>\n<\/ul>\n\n\n\n
              10. \u603b\u7ed3<\/strong><\/h3>\n\n\n\n
                \n
              • document.cookie<\/code><\/strong> \u7528\u4e8e\u8bbe\u7f6e\u3001\u8bfb\u53d6\u548c\u5220\u9664 Cookie\u3002<\/li>\n\n\n\n
              • Cookie \u53ef\u4ee5\u5b58\u50a8\u7528\u6237\u4fe1\u606f\u3001\u4f1a\u8bdd\u72b6\u6001\u3001\u504f\u597d\u8bbe\u7f6e\u7b49\u3002<\/li>\n\n\n\n
              • \u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e expires<\/code> \u5c5e\u6027\u6765\u63a7\u5236 Cookie \u7684\u8fc7\u671f\u65f6\u95f4\uff0c\u4f7f\u7528 path<\/code> \u548c domain<\/code> \u6765\u8bbe\u7f6e Cookie \u7684\u4f5c\u7528\u8303\u56f4\u3002<\/li>\n\n\n\n
              • \u4e3a\u4e86\u589e\u5f3a\u5b89\u5168\u6027\uff0c\u53ef\u4ee5\u4f7f\u7528 Secure<\/code> \u548c HttpOnly<\/code> \u6807\u5fd7\u3002<\/li>\n<\/ul>\n\n\n\n
                \u66f4\u591a\u8be6\u7ec6\u5185\u5bb9\u8bf7\u5173\u6ce8\u5176\u4ed6\u76f8\u5173\u6587\u7ae0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
                \u5728 Web \u5f00\u53d1\u4e2d\uff0cCookie \u662f\u4e00\u79cd\u5728\u7528\u6237\u7684\u6d4f\u89c8\u5668\u4e2d\u5b58\u50a8\u5c11\u91cf\u6570\u636e\u7684\u673a\u5236\u3002Cookie \u6570\u636e\u901a\u5e38\u7528\u4e8e\u5b58\u50a8\u7528\u6237 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[46],"tags":[],"class_list":["post-2155","post","type-post","status-publish","format-standard","hentry","category-javascript"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2155","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=2155"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2155\/revisions"}],"predecessor-version":[{"id":2156,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2155\/revisions\/2156"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=2155"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=2155"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=2155"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}