{"id":192,"date":"2022-04-08T18:10:58","date_gmt":"2022-04-08T10:10:58","guid":{"rendered":"https:\/\/reverieland.cn\/?p=192"},"modified":"2022-04-08T18:10:59","modified_gmt":"2022-04-08T10:10:59","slug":"js%e7%bc%93%e5%ad%98%e7%9b%b8%e5%85%b3%ef%bc%88%e4%b8%80%ef%bc%89","status":"publish","type":"post","link":"https:\/\/reverieland.cn\/index.php\/192\/","title":{"rendered":"JS\u7f13\u5b58\u76f8\u5173\uff08\u4e00\uff09"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">0.\u7f13\u5b58\u597d\u5904\u7b80\u8ff0<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>\u907f\u514d\u5197\u4f59\u7684\u6570\u636e\u4f20\u8f93\uff1a<\/li><\/ul>\n\n\n\n<p>\u5f53\u5f88\u591a\u7684\u4eba\u53bb\u8bbf\u95ee\u4e00\u4e2a\u7f51\u7ad9\u7684\u539f\u59cb\u670d\u52a1\u5668\uff0c\u6b64\u65f6\u539f\u59cb\u670d\u52a1\u5668\u4f1a\u4e3a\u6bcf\u4e2a\u8bbf\u95ee\u7740\u8005\u90fd\u53d1\u9001\u4e00\u4efd\u76f8\u540c\u7684\u6587\u672c\u3002\u8fd9\u6837\u5c31\u4f1a\u6d6a\u8d39\u6211\u4eec\u7684\u7f51\u7edc\u5e26\u5bbd\uff0c\u540c\u65f6\u4f7f\u6211\u4eec\u7684\u539f\u59cb\u670d\u52a1\u5668\u8d1f\u8f7d\u52a0\u91cd\u3002\u5047\u5982\u4f7f\u7528\u4e86\u7f13\u5b58\uff0c\u6b64\u65f6\u6211\u4eec\u5c31\u53ef\u4ee5\u5728\u7f13\u5b58\u670d\u52a1\u5668\u4e2d\u5907\u4efd\u4e00\u4efd\u6587\u672c\uff0c\u6b64\u65f6\u518d\u6709\u8bbf\u95ee\u8005\u8bbf\u95ee\u5c31\u4e0d\u7528\u76f4\u63a5\u548c\u539f\u59cb\u670d\u52a1\u5668\u5bf9\u63a5\uff0c\u8ba9\u7f13\u5b58\u53bb\u53d1\u9001\u6587\u672c\u3002\u8fd9\u6837\u53ef\u4ee5\u51cf\u5c11\u6211\u4eec\u7684\u539f\u59cb\u670d\u52a1\u5668\u7684\u8d1f\u8f7d\u538b\u529b\uff0c\u540c\u65f6\u53ef\u4ee5\u907f\u514d\u4e00\u4e9b\u4e0d\u5fc5\u8981\u7684\u6570\u636e\u4f20\u8f93\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u7f13\u89e3\u5e26\u5bbd\u74f6\u9888\uff1a<\/li><\/ul>\n\n\n\n<p>\u7f13\u5b58\u8fd8\u53ef\u4ee5\u7f13\u89e3\u5e26\u5bbd\u74f6\u9888\u3002\u6211\u4eec\u90fd\u77e5\u9053\u5728\u7f51\u7edc\u4f20\u8f93\u4e2d\uff0c\u6570\u636e\u7684\u4f20\u8f93\u901f\u7387\u4f1a\u4ee5\u8def\u5f84\u4e2d\u6700\u5c0f\u7684\u7684\u5e26\u5bbd\u6765\u8ba1\u7b97\u3002\u800c\u5927\u591a\u6570\u7684\u7f51\u7edc\u4e00\u822c\u4e3a\u672c\u5730\u7f51\u7edc\u63d0\u4f9b\u7684\u5e26\u5bbd\u662f\u5927\u4e8e\u8fdc\u7a0b\u7f51\u7edc\u7684\u5e26\u5bbd\u3002\u5f53\u6211\u4eec\u5728\u672c\u5730\u505a\u4e86\u7f13\u5b58\u4e4b\u540e\u5c31\u4e0d\u7528\u8fdc\u7a0b\u7684\u53bb\u5411\u539f\u59cb\u670d\u52a1\u5668\u8bf7\u6c42\u6570\u636e\uff0c\u5219\u907f\u514d\u4e86\u8fdc\u8ddd\u79bb\u4f20\u8f93\u6570\u636e\u65f6\u53d7\u5230\u5c0f\u5e26\u5bbd\u7684\u9650\u5236\uff0c\u8fd9\u6837\u6211\u4eec\u5c31\u5229\u7528\u5c40\u57df\u7f51\u7684\u8f83\u5927\u5e26\u5bbd\u6765\u4f20\u8f93\u6587\u672c\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u907f\u514d\u77ac\u95f4\u62e5\u585e\uff1a<\/li><\/ul>\n\n\n\n<p>\u77ac\u95f4\u62e5\u585e\u95ee\u9898\u5176\u5b9e\u5f88\u8003\u9a8c\u539f\u59cb\u670d\u52a1\u5668\u7684\u6297\u538b\u80fd\u529b\uff0c\u5f53\u5728\u7f51\u7edc\u4e0a\u6709\u4e00\u4e2a\u70ed\u70b9\u95ee\u9898\u7684\u65f6\u5019\uff0c\u4f1a\u5728\u77ed\u65f6\u95f4\u5185\u6709\u5de8\u5927\u7684\u70b9\u51fb\u91cf\uff0c\u8fd9\u6837\u670d\u52a1\u5668\u4e0d\u5f97\u4e0d\u5728\u4f46\u65f6\u95f4\u5185\u5904\u7406\u767e\u4e07\u8ba1\u7684\u7f51\u7edc\u8bf7\u6c42\u3002\u5982\u679c\u6211\u4eec\u4e0d\u505a\u7f13\u5b58\u5904\u7406\uff0c\u90a3\u4e48\u8fd9\u6837\u7684\u5bf9\u539f\u59cb\u670d\u52a1\u5668\u7684\u8003\u9a8c\u662f\u5de8\u5927\u7684\u3002\u5982\u679c\u6211\u4eec\u505a\u4e86\u7f13\u5b58\uff0c\u7528\u6237\u6ca1\u6709\u5fc5\u8981\u5411\u670d\u52a1\u5668\u8bf7\u6c42\u4e00\u4e9b\u975e\u5fc5\u8981\u7684\u6570\u636e\u6216\u8005\u6587\u672c\uff0c\u8fd9\u6837\u5bf9\u4e8e\u539f\u59cb\u670d\u52a1\u5668\u6765\u8bf4\u662f\u4e00\u4e2a\u6781\u5927\u7684\u5e2e\u52a9\uff0c\u51cf\u5c11\u4e86\u670d\u52a1\u5668\u53bb\u63a5\u6536\u8bbf\u95ee\u7684\u6570\u636e\u7684\u6b21\u6570\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u8ddd\u79bb\u5ef6\u8fdf\uff1a<\/li><\/ul>\n\n\n\n<p>\u6570\u636e\u4f20\u8f93\u7684\u8fc7\u7a0b\u4e2d\uff0c\u5f53\u53d1\u9001\u8005\u548c\u63a5\u6536\u8005\u4e24\u8005\u7684\u8ddd\u79bb\u5f88\u8fdc\uff0c\u90a3\u4e48\u6570\u636e\u4f20\u8f93\u5e26\u6765\u7684\u5ef6\u8fdf\u5c31\u8d8a\u660e\u663e\u3002\u5373\u4f7f\u662f\u5149\u901f\u4f20\u8f93\uff0c\u4e5f\u4f1a\u5b58\u5728\u5ef6\u8fdf\uff0c\u800c\u7f13\u5b58\u80fd\u591f\u8ba9\u8fdc\u8ddd\u79bb\u6570\u636e\u4f20\u8f93\u53d8\u5f97\u5f88\u4f4e\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">1.\u5e38\u89c1\u7684\u672c\u5730\u7f13\u5b58<\/h2>\n\n\n\n<p>1.storage\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>SessionStorage\uff1a<\/li><\/ul>\n\n\n\n<p>\u4e34\u65f6\u7684\u4f1a\u8bdd\u5b58\u50a8\uff0c\u53ea\u8981\u5f53\u524d\u7684\u4f1a\u8bdd\u7a97\u53e3\u672a\u5173\u95ed\uff0c\u5b58\u50a8\u7684\u4fe1\u606f\u5c31\u4e0d\u4f1a\u4e22\u5931\uff0c\u5373\u4fbf\u5237\u65b0\u4e86\u9875\u9762\u6216\u8005\u5728\u7f16\u8f91\u5668\u4e2d\u66f4\u6539\u4e86\u4ee3\u7801\uff0c\u5b58\u50a8\u7684\u4f1a\u8bdd\u4fe1\u606f\u4e5f\u4e0d\u4f1a\u4e22\u5931\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>LocalStorage<\/li><\/ul>\n\n\n\n<p>\u5982\u679c\u4e0d\u4e3b\u52a8\u5220\u9664\uff0c\u5219\u4f1a\u6c38\u4e45\u7684\u5b58\u50a8\u5728\u7528\u6237\u672c\u5730<br>\u5c01\u88c5\u7684\u5c0f\u5de5\u5177\u65b9\u6cd5\uff1alocalStorage.js<br><\/p>\n\n\n\n<p>2.cookie\uff08\u53e6\u4f5c\u4ecb\u7ecd\uff09<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2.cookie\u4e0estorage\u533a\u522b<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>cookie\u517c\u5bb9\u6240\u6709\u7684\u6d4f\u89c8\u5668\uff08\u672c\u5730cookie\u8c37\u6b4c\u4e0d\u652f\u6301\uff09\uff0cstorage\u4e0d\u652f\u6301IE6~8\uff1b<\/li><li>\u4e8c\u8005\u5bf9\u5b58\u50a8\u7684\u5185\u5bb9\u5747\u6709\u5927\u5c0f\u9650\u5236\uff0c\u524d\u8005\u540c\u6e90\u60c5\u51b5\u5199\u4e00\u822c\u4e0d\u80fd\u5b58\u50a84kb\u7684\u5185\u5bb9\uff0c\u540e\u8005\u540c\u6e90\u4e00\u822c\u80fd\u5b58\u50a8\u53ea\u80fd\u5b58\u50a85MB\u7684\u6570\u636e\uff1b<\/li><li>cookie\u6709\u8fc7\u671f\u65f6\u95f4\uff0clocalStorage\u662f\u6c38\u4e45\u5b58\u50a8\uff1b<\/li><li>\u4e00\u4e9b\u6d4f\u89c8\u5668\u5904\u4e8e\u5b89\u5168\u7684\u89d2\u5ea6\u53ef\u80fd\u4f1a\u7981\u7528cookie,\u4f46\u65e0\u6cd5\u7981\u7528localStorage\u3002<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">3.\u624b\u52a8\u5b9e\u73b0\u7f13\u5b58\u7684\u65b9\u6cd5<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>function memoize(fn) {\n  const cache = {};\n  return function (param) {\n    if (cache&#91;param]) {\n      console.log('cached');\n      return cache&#91;param];\n    } else {\n      let result = fn(param);\n      cache&#91;param] = result;\n      console.log(`not cached`);\n      return result;\n    }\n  }\n}\n\nconst toUpper = (str =\"\")=&gt; str.toUpperCase();\n\nconst toUpperMemoized = memoize(toUpper);\n\ntoUpperMemoized(\"abcdef\");\ntoUpperMemoized(\"abcdef\");<\/code><\/pre>\n\n\n\n<p>\u4f7f\u80fd\u63a5\u53d7\u591a\u4e2a\u53c2\u6570\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>const slice = Array.prototype.slice;\nfunction memoize(fn) {\n  const cache = {};\n  return (...args) =&gt; {\n    const params = slice.call(args);\n    console.log(params);\n    if (cache&#91;params]) {\n      console.log('cached');\n      return cache&#91;params];\n    } else {\n      let result = fn(...args);\n      cache&#91;params] = result;\n      console.log(`not cached`);\n      return result;\n    }\n  }\n}\nconst makeFullName = (fName, lName) =&gt; `${fName} ${lName}`;\nconst reduceAdd = (numbers, startingValue = 0) =&gt; numbers.reduce((total, cur) =&gt; total + cur, startingValue);\n\nconst memoizedMakeFullName = memoize(makeFullName);\nconst memoizedReduceAdd = memoize(reduceAdd);\n\nmemoizedMakeFullName(\"Marko\", \"Polo\");\nmemoizedMakeFullName(\"Marko\", \"Polo\");\n\nmemoizedReduceAdd(&#91;1, 2, 3, 4, 5], 5);\nmemoizedReduceAdd(&#91;1, 2, 3, 4, 5], 5);<\/code><\/pre>\n\n\n\n<p class=\"has-text-align-center\">---END---<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7f13\u5b58\u7b14\u8bb0\u6458\u8981<\/p>\n","protected":false},"author":1,"featured_media":193,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","emotion":"","emotion_color":"","title_style":"","license":"","footnotes":""},"categories":[3],"tags":[19],"class_list":["post-192","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-frontend","tag-javascript"],"_links":{"self":[{"href":"https:\/\/reverieland.cn\/index.php\/wp-json\/wp\/v2\/posts\/192","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/reverieland.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/reverieland.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/reverieland.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/reverieland.cn\/index.php\/wp-json\/wp\/v2\/comments?post=192"}],"version-history":[{"count":2,"href":"https:\/\/reverieland.cn\/index.php\/wp-json\/wp\/v2\/posts\/192\/revisions"}],"predecessor-version":[{"id":207,"href":"https:\/\/reverieland.cn\/index.php\/wp-json\/wp\/v2\/posts\/192\/revisions\/207"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/reverieland.cn\/index.php\/wp-json\/wp\/v2\/media\/193"}],"wp:attachment":[{"href":"https:\/\/reverieland.cn\/index.php\/wp-json\/wp\/v2\/media?parent=192"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/reverieland.cn\/index.php\/wp-json\/wp\/v2\/categories?post=192"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/reverieland.cn\/index.php\/wp-json\/wp\/v2\/tags?post=192"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}