{"id":86,"date":"2020-11-22T10:31:20","date_gmt":"2020-11-22T02:31:20","guid":{"rendered":"http:\/\/qqiuklele.cn\/?p=86"},"modified":"2025-03-26T15:20:50","modified_gmt":"2025-03-26T07:20:50","slug":"%e5%bc%ba%e5%a4%a7%e7%9a%84html5%e7%89%b9%e6%80%a7%e4%b9%8b%e4%b8%80-%e6%9c%ac%e5%9c%b0%e5%ad%98%e5%82%a8","status":"publish","type":"post","link":"https:\/\/qqiukulele.cn\/?p=86","title":{"rendered":"\u5f3a\u5927\u7684HTML5\u7279\u6027\u4e4b\u4e00–\u672c\u5730\u5b58\u50a8"},"content":{"rendered":"\n

\u201cWeb \u5b58\u50a8\u5bf9\u8c61 localStorage<\/code> \u548c sessionStorage<\/code> \u5141\u8bb8\u6211\u4eec\u5728\u6d4f\u89c8\u5668\u4e0a\u4fdd\u5b58\u952e\/\u503c\u5bf9\u3002\u5728\u9875\u9762\u5237\u65b0\u540e\uff08\u5bf9\u4e8e sessionStorage<\/code>\uff09\u751a\u81f3\u6d4f\u89c8\u5668\u5b8c\u5168\u91cd\u542f\uff08\u5bf9\u4e8e localStorage<\/code>\uff09\u540e\uff0c\u6570\u636e\u4ecd\u7136\u4fdd\u7559\u5728\u6d4f\u89c8\u5668\u4e2d\u3002\u8fd9\u5c31\u662fHTML5\u672c\u5730\u5b58\u50a8\u3002\u201d<\/p><\/blockquote>\n\n\n\n

Cookie<\/h2>\n\n\n\n

\u8bf4\u5230\u6d4f\u89c8\u5668\u91cc\u7684\u6570\u636e\u5b58\u50a8\uff0c\u5f88\u591a\u4eba\u4f1a\u60f3\u5230cookie\u3002Cookie\u8868\u793a\u5728HTTP\u670d\u52a1\u5668\u548c\u5ba2\u6237\u95f4\u4f20\u9012\u7684\u72b6\u6001\u4fe1\u606f\uff0c\u662f\u4e00\u4e2a\u8bb0\u5f55\u4fe1\u606f\u7684\u5c0f\u5c0f\u6587\u672c\u6587\u4ef6\uff0c\u53ef\u4ee5\u5b9e\u73b0\u8bb0\u5f55\u7528\u6237\u4e2a\u4eba\u4fe1\u606f\u7684\u529f\u80fd<\/strong>\u3002<\/p>\n\n\n\n

Cookie\u7684\u6570\u91cf\u4ee5\u53ca\u5927\u5c0f\u6709\u4e25\u683c\u9650\u5236\uff0c\u5404\u4e2a\u6d4f\u89c8\u5668\u7684\u57df\u540dcookie\u9650\u5236\u4e5f\u4e0d\u540c\uff0c\u50cf Firefox \u9650\u5236\u6bcf\u4e2a\u57df\u6700\u591a 50 \u4e2a cookie\u3002\u5927\u591a\u6570\u6d4f\u89c8\u5668\u90fd\u6709\u5927\u7ea6 4096B\uff08\u52a0\u51cf 1\uff09\u7684\u957f\u5ea6\u9650\u5236\u3002\u4ee5\u6b64\u770b\u6765\uff0ccookie\u80fd\u5b58\u50a8\u7684\u4fe1\u606f\u91cf\u4e0d\u662f\u5f88\u591a\uff0c\u4e0d\u9002\u7528\u4e8e\u5927\u91cf\u4fe1\u606f\u7684\u5b58\u50a8\u3002\u5176\u6b21\uff0ccookie\u7684\u4f7f\u7528\u4e5f\u662f\u6bd4\u8f83\u9ebb\u70e6\u7684\uff08\u5bf9\u6bd4\u63a5\u4e0b\u6765\u8981\u8bb2\u5230\u7684\u672c\u5730\u5b58\u50a8\u6765\u8bf4\uff09\uff0c\u53ef\u4ee5\u7b80\u5355\u5f97\u770b\u4e00\u770b\u83dc\u9e1f\u6559\u7a0b\u7684\u4f8b\u5b50\uff1a \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n\n\n\n

\u56e0\u4e3acookie\u683c\u5f0f\u662f\u5b57\u7b26\u4e32\u5f62\u5f0f\uff0c\u7528 \uff1b<\/code>\u53bb\u5206\u9694\u4e0d\u540c\u7684\u503c\uff0c\u6240\u4ee5\u4ece\u83dc\u9e1f\u5b98\u7f51\u7684\u4ee3\u7801\u6765\u770b\uff0c\u53d6cookie\u91cc\u7684\u7279\u5b9a\u503c\u8fd8\u9700\u8981\u5148\u5206\u5272\u5b57\u7b26\u4e32\u518d\u5224\u65ad\u5bf9\u6bd4key\u3002<\/p>\n\n\n\n

\u6700\u540e\uff0c\u5728 cookie \u4e2d\u5b58\u50a8\u5927\u91cf\u4fe1\u606f\u4f1a\u5f71\u54cd\u5230\u7279\u5b9a\u57df\u7684\u8bf7\u6c42\u6027\u80fd\u3002cookie \u4fe1\u606f\u8d8a\u5927\uff0c\u5b8c\u6210\u5bf9\u670d\u52a1\u5668\u8bf7\u6c42\u7684\u65f6\u95f4\u4e5f\u5c31\u8d8a\u957f\u3002<\/p>\n\n\n\n

\u4e0d\u662f\u4e00\u987f\u72c2\u8e29cookie\uff0c\u53ea\u662f\u4e3a\u4e86\u886c\u6258\u51fa\u4e0b\u6587\u7684\u4e3b\u89d2\u4eec\u54df~<\/p>\n\n\n\n

HTML5\u7684\u6570\u636e\u5b58\u50a8<\/h2>\n\n\n\n

Web Storage \u7684\u51fa\u73b0\uff0c\u662f\u514b\u670d\u7531 cookie \u5e26\u6765\u7684\u4e00\u4e9b\u9650 \u5236\u3002\u5f53\u6570\u636e\u9700\u8981\u88ab\u4e25\u683c\u63a7\u5236\u5728\u5ba2\u6237\u7aef\u4e0a\u65f6\uff0c\u65e0\u987b\u6301\u7eed\u5730\u5c06\u6570\u636e\u53d1\u56de\u670d\u52a1\u5668\u3002Web Storage \u7684\u4e24\u4e2a\u4e3b\u8981\u76ee\u6807\u662f\uff1a<\/p>\n\n\n\n

  • \u63d0\u4f9b\u4e00\u79cd\u5728 cookie \u4e4b\u5916\u5b58\u50a8\u4f1a\u8bdd\u6570\u636e\u7684\u9014\u5f84\uff1b<\/li>
  • \u63d0\u4f9b\u4e00\u79cd\u5b58\u50a8\u5927\u91cf\u53ef\u4ee5\u8de8\u4f1a\u8bdd\u5b58\u5728\u7684\u6570\u636e\u7684\u673a\u5236\u3002<\/li><\/ul>\n\n\n\n

    Storage<\/h3>\n\n\n\n

    \u4f5c\u4e3a Web Storage API \u7684\u63a5\u53e3\uff0cStorage<\/code><\/strong> \u63d0\u4f9b\u4e86\u8bbf\u95ee\u7279\u5b9a\u57df\u540d\u4e0b\u7684\u4f1a\u8bdd\u5b58\u50a8\u6216\u672c\u5730\u5b58\u50a8\u7684\u529f\u80fd\u3002<\/p><\/blockquote>\n\n\n\n

    sessionStorage\u548clocalStorage\u90fd\u662fStorage\u7684\u5b9e\u4f8b\u5bf9\u8c61\u3002Storage\u7684\u4e3b\u8981\u65b9\u6cd5<\/em>\u6709\u5982\u4e0b\uff1a<\/p>\n\n\n\n

      length   \/\/\u4fdd\u5b58\u6570\u636e\u6570\u76ee
      clear()   \/\/\u6e05\u7a7a\u6570\u636e
      setItem(key,value)   \/\/\u65b0\u589e\u6570\u636e 
      getItem(key)   \/\/\u6839\u636ekey\u83b7\u53d6\u503c
      removeItem(key)   \/\/\u5220\u9664
      key(index)   \/\/\u6839\u636e\u4e0b\u6807\u83b7\u53d6\u503c<\/pre>\n\n\n\n
    \u5bf9\u6570\u636e\u7684\u64cd\u4f5c\u9664\u4e86\u53ef\u4ee5\u7528\u63d0\u4f9b\u7684\u65b9\u6cd5\uff0c\u4e5f\u53ef\u4ee5\u901a\u8fc7\u7c7b\u5bf9\u8c61\u65b9\u5f0f\u8bbf\u95ee\u64cd\u4f5c\uff0c\u8be6\u89c1\u4e0b\u6587\u7684\u4ee3\u7801\u3002<\/p>\n\n\n\n
    sessionStorage \u5bf9\u8c61<\/h3>\n\n\n\n
    sessionStorage \u5bf9\u8c61\u5b58\u50a8\u7279\u5b9a\u4e8e\u67d0\u4e2a\u4f1a\u8bdd\u7684\u6570\u636e\uff0c\u4e5f\u5c31\u662f\u8be5\u6570\u636e\u53ea\u4fdd\u6301\u5230\u6d4f\u89c8\u5668\u5173\u95ed\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5b83\u53ea\u662f\u4f34\u968f\u7740session\uff0c\u7a97\u53e3\u4e00\u65e6\u5173\u95ed\uff0c\u5c31\u6ca1\u4e86\u3002<\/strong><\/p>\n\n\n\n
    \u6700\u5e38\u89c1\u7684\u5e94\u7528\u573a\u666f\u6709\uff0c\u6211\u70b9\u51fb\u4e86\u7f51\u9875\u91cc\u7684\u67d0\u4e2a\u94fe\u63a5\uff0c\u94fe\u63a5\u7684\u5b57\u4f53\u989c\u8272\u5c31\u53d8\u4e86\uff0c\u5c31\u7b97\u6211\u5237\u65b0\u4e86\u9875\u9762\uff0c\u90a3\u4e2a\u94fe\u63a5\u7684\u5b57\u4f53\u8fd8\u662f\u663e\u793a\u7740\u8868\u793a\u8fd9\u4e2a\u9875\u9762\u88ab\u70b9\u51fb\u8fc7\u7684\u989c\u8272\u3002<\/p>\n\n\n\n
    sessionStorage\u4f5c\u4e3aStorage\u5b9e\u4f8b\uff0c\u5bf9\u6570\u636e\u7684\u64cd\u4f5c\u5982\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n\n\n\n
        \/\/\u4f7f\u7528\u65b9\u6cd5\u5b58\u50a8\u6570\u636e
        sessionStorage.setItem(\"name\", \"QQi\");
        \/\/\u7c7b\u5bf9\u8c61\u65b9\u5f0f  \u4f7f\u7528\u5c5e\u6027\u5b58\u50a8\u6570\u636e 
        sessionStorage.person = \"QQi\"; 
        \/\/\u4f7f\u7528\u65b9\u6cd5\u8bfb\u53d6\u6570\u636e
        let name = sessionStorage.getItem(\"person\");
        console.log(name)  \/\/QQi
        \/\/\u7c7b\u5bf9\u8c61\u65b9\u5f0f \u4f7f\u7528\u5c5e\u6027\u8bfb\u53d6\u6570\u636e
        let name = sessionStorage.person; 
        console.log(name) \/\/QQi
        \/\/\u4f7f\u7528 delete \u5220\u9664\u4e00\u4e2a\u503c\u2014\u2014\u5728 WebKit \u4e2d\u65e0\u6548
        console.log(sessionStorage.name) \/\/QQi
        delete sessionStorage.name;
        console.log(sessionStorage.name)  \/\/undefined
        \/\/\u4f7f\u7528\u65b9\u6cd5\u5220\u9664\u4e00\u4e2a\u503c
        let a = sessionStorage.removeItem(\"name\"); 
        console.log(a)  \/\/undefined <\/pre>\n\n\n\n
    localStorage \u5bf9\u8c61<\/h3>\n\n\n\n
    localStorage \u5bf9\u8c61\u5728\u4fee\u8ba2\u8fc7\u7684 HTML 5 \u89c4\u8303\u4e2d\u4f5c\u4e3a\u6301\u4e45\u4fdd\u5b58\u5ba2\u6237\u7aef\u6570\u636e\u7684\u65b9\u6848\u53d6\u4ee3\u4e86 globalStorage\u3002\u5728\u7f51\u7ad9\u4e2d\u7684\u5404\u9875\u9762\u60f3\u64cd\u4f5c\u540c\u4e00\u4e2alocalStorage\u5bf9\u8c61\uff0c\u5fc5\u987b\u662f\u540c\u4e00\u57df\u540d\u3001\u540c\u4e00\u534f\u8bae\u3001\u540c\u4e00\u7aef\u53e3\u7684\u3002<\/strong><\/p>\n\n\n\n
    localStorage\u5b83\u901a\u8fc7\u78c1\u76d8\u7f13\u5b58\uff0c\u6570\u636e\u4e0d\u4f1a\u81ea\u52a8\u6e05\u9664\uff0c\u9664\u4e86\u624b\u52a8\u5728\u6d4f\u89c8\u5668\u6e05\u9664\u7f13\u5b58\uff0c\u6216\u8005\u5199\u4ee3\u7801\u5220\u9664\u3002\u6240\u4ee5\u5173\u95ed\u6d4f\u89c8\u5668\u540e\uff0csessionStorage\u4f1a\u88ab\u6e05\u9664\uff0clocalStorage\u4e0d\u4f1a\u3002\u6240\u4ee5\uff0c\u7528local Storage\u5b58\u50a8\u7684\u6570\u636e\uff0c\u5728\u7b2c\u4e8c\u6b21\u6253\u5f00\u9875\u9762\u7684\u65f6\u5019\uff0c\u8fd8\u80fd\u88ab\u770b\u89c1\u3002<\/strong> \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \u56fe ?\u6d4f\u89c8\u5668\u91cc\u7684\u5f00\u53d1\u8005\u5de5\u5177\u67e5\u770blocalStorage<\/em><\/p>\n\n\n\n
    \u4f5c\u4e3aStorage\u5b9e\u4f8b\uff0c\u5bf9\u6570\u636e\u7684\u64cd\u4f5c\u5b9e\u73b0\u5982\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n\n\n\n
        \/\/\u4f7f\u7528\u65b9\u6cd5\u5b58\u50a8\u6570\u636e
        localStorage.setItem(\"name\", \"QQi\");
        \/\/\u7c7b\u5bf9\u8c61\u65b9\u5f0f \u4f7f\u7528\u5c5e\u6027\u5b58\u50a8\u6570\u636e
        localStorage.name = \"QQi\";
        \/\/\u4f7f\u7528\u65b9\u6cd5\u8bfb\u53d6\u6570\u636e
        let name = localStorage.getItem(\"name\");
        console.log(name)  \/\/QQi
        \/\/ \u7c7b\u5bf9\u8c61\u65b9\u5f0f \u4f7f\u7528\u5c5e\u6027\u8bfb\u53d6\u6570\u636e
        let name2 = localStorage.name; 
        console.log(name)  \/\/QQi
        \/\/\u4f7f\u7528\u65b9\u6cd5\u5220\u9664\u4e00\u4e2a\u503c
        let a = localStorage.removeItem(\"name\"); 
        console.log(a)\/\/undefined
        \/\/\u4f7f\u7528 delete \u5220\u9664\u4e00\u4e2a\u503c\u2014\u2014\u5728 WebKit \u4e2d\u65e0\u6548
        delete localStorage.name;
        console.log(localStorage.name)  \/\/undefined  \u5982\u679c\u6253\u5370name\uff0c\u8fd8\u662f\u80fd\u8f93\u51faQQi<\/pre>\n\n\n\n
    \u5176\u5b9e\u6211\u53d1\u73b0\u4e00\u70b9\uff0c\u5c31\u7b97\u6211\u5728\u5220\u9664\u6570\u636e\u4ee3\u7801\u540e\u6253\u5370\u88ab\u5220\u9664\u7684\u952e\u503c\u5bf9\uff0c\u6bd4\u5982\u5728\u5220\u9664\u4ee3\u7801\u540e\u6253\u5370name\uff0c\u5982console.log(name)\uff0c\u503c\u8fd8\u662f\u80fd\u7167\u6837\u6253\u5370\u51fa\u6765\uff01\u6211\u521a\u5f00\u59cb\u7591\u60d1\u4e86\u4e0d\u4e45\u3002\u540e\u6765\u53d1\u73b0\u5fc5\u987b\u8981\u5e26localStorage\u6216\u8005sessionStorage\u4fee\u9970\u624d\u80fd\u8868\u660e\u8bbf\u95ee\u7684\u662f\u672c\u5730\u5b58\u50a8\u7740\u7684\u53d8\u91cf\u3002 \u6211\u53ea\u662f\u5220\u9664\u4e86localStorage\u4e2d\u7684\u67d0\u4e2a\u952e\u503c\u5bf9\uff0c\u5185\u5b58\u91cc\u8fd8\u4fdd\u5b58\u7740\u4e00\u4efd\u952e\u503c\u5bf9\u7684\u53d8\u91cf\u3002<\/strong>\uff08\u4e2a\u4eba\u7684\u601d\u8003\u7406\u89e3?\uff09<\/p>\n\n\n\n
    \u7531\u4e8e\u5b58\u50a8\u5bf9\u8c61\u662f\u4e0d\u53ef\u8fed\u4ee3\u7684\uff08\u5bf9\u8c61\u90fd\u4e0d\u53ef\u8fed\u4ee3\uff09\uff0c\u4e0d\u80fd\u4f7f\u7528\u8fed\u4ee3\u65b9\u6cd5\uff0c\u6211\u4eec\u9700\u8981\u50cf\u904d\u5386\u6570\u7ec4\u4e00\u6837\u904d\u5386\u5b58\u50a8\u5bf9\u8c61\uff0c\u624d\u80fd\u628a\u6240\u7528\u503c\u90fd\u6253\u5370\u51fa\u6765\u3002<\/p>\n\n\n\n
    \u4e3a\u4e86\u907f\u514d\u5728\u6253\u5370\u5bf9\u8c61\u65f6\u628a\u5bf9\u8c61\u539f\u578b\u81ea\u5e26\u7684\u952e\u503c\u6253\u5370\u51fa\u6765\uff0c\u904d\u5386\u7684\u65f6\u5019\u53ef\u4ee5\u505a\u4e2a\u5224\u65ad\u6765\u6ee4\u6389\u539f\u578b\u4e2d\u7684\u5b57\u6bb5\uff1a<\/p>\n\n\n\n
     for(let key in localStorage) {
          if (!localStorage.hasOwnProperty(key)) {
          continue; \/\/ \u8df3\u8fc7\u50cf \"setItem\"\uff0c\"getItem\" \u7b49\u8fd9\u6837\u7684\u952e
       }
         console.log(`${key}: ${localStorage.getItem(key)}`);
      }<\/pre>\n\n\n\n
    \u5176\u4ed6<\/h3>\n\n\n\n
    Web\u5b58\u50a8\u5bf9\u8c61\u7684\u5b58\u50a8\u5927\u5c0f\u9650\u5236\u4e3a 5MB+\uff0c\u6bd4\u8d77cookie\u7684\u5927\u5f97\u591a\u4e86\u3002<\/p>\n\n\n\n
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