{"id":88457,"date":"2024-04-07T17:30:44","date_gmt":"2024-04-07T09:30:44","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/88457.html"},"modified":"2024-04-07T17:30:45","modified_gmt":"2024-04-07T09:30:45","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8localstorage%e5%92%8csessionstorage","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/88457.html","title":{"rendered":"\u5982\u4f55\u4f7f\u7528localStorage\u548csessionStorage"},"content":{"rendered":"<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/02172716\/ef11a4e4-eb7a-448e-aa72-3667c29559e0.webp\" alt=\"\u5982\u4f55\u4f7f\u7528localStorage\u548csessionStorage\" \/><\/p>\n<p><p>localStorage\u548csessionStorage\u662fWeb\u5b58\u50a8API\u63d0\u4f9b\u7684\u4e24\u79cd\u5728\u5ba2\u6237\u7aef\u5b58\u50a8\u6570\u636e\u7684\u65b9\u6cd5\u3002<strong>localStorage<\/strong> \u7528\u4e8e\u957f\u671f\u5b58\u50a8\u6570\u636e\uff0c\u6570\u636e\u5728\u5173\u95ed\u6d4f\u89c8\u5668\u6216\u91cd\u542f\u7535\u8111\u540e\u4f9d\u7136\u5b58\u5728\uff0c\u9664\u975e\u4e3b\u52a8\u5220\u9664\u6570\u636e\u3002<strong>sessionStorage<\/strong> \u5219\u662f\u7528\u4e8e\u540c\u4e00\u4f1a\u8bdd\u671f\u95f4\u7684\u6570\u636e\u5b58\u50a8\uff0c\u6570\u636e\u4f1a\u5728\u6d4f\u89c8\u5668\u6216\u9009\u9879\u5361\u5173\u95ed\u540e\u81ea\u52a8\u88ab\u5220\u9664\u3002\u5728\u4f7f\u7528\u65f6\uff0c\u5b83\u4eec\u90fd\u63d0\u4f9b\u4e86\u7c7b\u4f3c\u7684\u65b9\u6cd5\u548c\u5c5e\u6027\uff0c\u4f46\u9488\u5bf9\u4e0d\u540c\u7684\u5b58\u50a8\u9700\u6c42\u3002localStorage\u9002\u5408\u7528\u4e8e\u5b58\u50a8\u8f83\u5c11\u53d8\u66f4\u7684\u6570\u636e\uff0c\u5982\u7528\u6237\u8bbe\u7f6e\u504f\u597d\uff0c\u800csessionStorage\u5219\u9002\u5408\u6682\u65f6\u5b58\u50a8\u5982\u8868\u5355\u6570\u636e\u3002<\/p>\n<\/p>\n<p><h3>\u4e00\u3001LOCALSTORAGE\u7684\u4f7f\u7528\u65b9\u6cd5<\/h3>\n<\/p>\n<p><h4>\u5b58\u50a8\u6570\u636e<\/h4>\n<\/p>\n<p><p>\u4f7f\u7528localStorage\u5b58\u50a8\u6570\u636e\u662f\u975e\u5e38\u7b80\u5355\u7684\u3002\u4f60\u53ef\u4ee5\u901a\u8fc7<code>localStorage.setItem(key, value)<\/code>\u65b9\u6cd5\u6765\u4fdd\u5b58\u4f60\u9700\u8981\u7684\u6570\u636e\uff0c\u5176\u4e2d<code>key<\/code>\u662f\u4f60\u7684\u6570\u636e\u7d22\u5f15\u540d\uff0c\u800c<code>value<\/code>\u662f\u4f60\u8981\u5b58\u50a8\u7684\u6570\u636e\u3002\u4f8b\u5982\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-javascript\">localStorage.setItem(&#039;username&#039;, &#039;JohnDoe&#039;);<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u8fd9\u5c06\u4f1a\u5728localStorage\u4e2d\u5b58\u50a8\u4e00\u4e2a\u540d\u4e3a<code>username<\/code>\u7684\u9879\uff0c\u5176\u503c\u4e3a<code>JohnDoe<\/code>\u3002<\/p>\n<\/p>\n<p><h4>\u63d0\u53d6\u6570\u636e<\/h4>\n<\/p>\n<p><p>\u4f60\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528<code>localStorage.getItem(key)<\/code>\u65b9\u6cd5\u6765\u83b7\u53d6\u4e4b\u524d\u5b58\u50a8\u7684\u6570\u636e\u3002\u5982\u679c\u63d0\u5230\u7684key\u5b58\u5728\uff0c\u5b83\u4f1a\u8fd4\u56de\u5bf9\u5e94\u7684value\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-javascript\">let username = localStorage.getItem(&#039;username&#039;);<\/p>\n<p>console.log(username); \/\/ \u8f93\u51fa: JohnDoe<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5982\u679c\u4e4b\u524d\u6ca1\u6709\u5b58\u50a8\u8fc7&#039;username&#039;\uff0c\u90a3\u4e48\u4e0a\u9762\u7684\u547d\u4ee4\u5c06\u8fd4\u56de<code>null<\/code>\u3002<\/p>\n<\/p>\n<p><h4>\u5220\u9664\u6570\u636e<\/h4>\n<\/p>\n<p><p>\u8981\u5220\u9664localStorage\u4e2d\u7684\u67d0\u4e2a\u9879\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528<code>localStorage.removeItem(key)<\/code>\u65b9\u6cd5\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-javascript\">localStorage.removeItem(&#039;username&#039;);<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u6b64\u547d\u4ee4\u6267\u884c\u4e4b\u540e\uff0c&#039;username&#039;\u9879\u5c06\u4e0d\u518d\u5b58\u5728\u4e8elocalStorage\u4e2d\u3002<\/p>\n<\/p>\n<p><h3>\u4e8c\u3001SESSIONSTORAGE\u7684\u4f7f\u7528\u65b9\u6cd5<\/h3>\n<\/p>\n<p><h4>\u5b58\u50a8\u6570\u636e<\/h4>\n<\/p>\n<p><p>sessionStorage\u7684\u5b58\u50a8\u65b9\u6cd5\u4e0elocalStorage\u7c7b\u4f3c\uff0c\u4e5f\u662f\u4f7f\u7528<code>sessionStorage.setItem(key, value)<\/code>\u3002\u4f8b\u5982\uff0c\u5b58\u50a8\u4e00\u4e2a\u4f1a\u8bdd\u7ea7\u522b\u7684\u7528\u6237\u9009\u62e9\u53ef\u4ee5\u8fd9\u6837\u505a\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-javascript\">sessionStorage.setItem(&#039;sessionChoice&#039;, &#039;1&#039;);<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>\u63d0\u53d6\u6570\u636e<\/h4>\n<\/p>\n<p><p>\u8981\u4ecesessionStorage\u4e2d\u83b7\u53d6\u6570\u636e\uff0c\u4f7f\u7528<code>sessionStorage.getItem(key)<\/code>\u65b9\u6cd5\u3002\u5982\u679c\u5b58\u50a8\u4e86\u76f8\u5e94\u7684\u6570\u636e\uff0c\u5b83\u5c06\u8fd4\u56de\u6570\u636e\uff1b\u5426\u5219\uff0c\u8fd4\u56de<code>null<\/code>\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-javascript\">let sessionChoice = sessionStorage.getItem(&#039;sessionChoice&#039;);<\/p>\n<p>console.log(sessionChoice); \/\/ \u8f93\u51fa: 1<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>\u5220\u9664\u6570\u636e<\/h4>\n<\/p>\n<p><p>\u5220\u9664sessionStorage\u4e2d\u7684\u6570\u636e\u4e5f\u4f7f\u7528<code>sessionStorage.removeItem(key)<\/code>\u65b9\u6cd5\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-javascript\">sessionStorage.removeItem(&#039;sessionChoice&#039;);<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u6267\u884c\u540e\uff0c&#039;sessionChoice&#039;\u9879\u5c06\u4ecesessionStorage\u4e2d\u5220\u9664\u3002<\/p>\n<\/p>\n<p><h3>\u4e09\u3001\u6e05\u9664\u6240\u6709\u5b58\u50a8\u6570\u636e<\/h3>\n<\/p>\n<p><p>\u53ef\u4f7f\u7528localStorage\u6216sessionStorage\u63d0\u4f9b\u7684<code>clear()<\/code>\u65b9\u6cd5\u6765\u79fb\u9664\u6240\u6709\u5b58\u50a8\u7684\u6570\u636e\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-javascript\">localStorage.clear(); \/\/ \u6e05\u9664localStorage\u4e2d\u7684\u6240\u6709\u6570\u636e<\/p>\n<p>sessionStorage.clear(); \/\/ \u6e05\u9664sessionStorage\u4e2d\u7684\u6240\u6709\u6570\u636e<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h3>\u56db\u3001\u4e8b\u4ef6\u76d1\u542c\u4e0e\u5b58\u50a8\u9650\u5236<\/h3>\n<\/p>\n<p><h4>\u76d1\u542c\u5b58\u50a8\u4e8b\u4ef6<\/h4>\n<\/p>\n<p><p>\u5b58\u50a8\u4e8b\u4ef6\u5141\u8bb8\u4f60\u76d1\u542c\u5728\u540c\u4e00\u57df\u4e0b\u7684\u9875\u9762\u5b58\u50a8\u53d8\u5316\u3002\u5f53\u4f7f\u7528<code>setItem<\/code>\u3001<code>removeItem<\/code>\u6216<code>clear<\/code>\u65b9\u6cd5\u8fdb\u884c\u5b58\u50a8\u64cd\u4f5c\u65f6\u4f1a\u89e6\u53d1\u3002\u4f8b\u5982\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-javascript\">window.addEventListener(&#039;storage&#039;, (e) =&gt; {<\/p>\n<p>  console.log(&#039;\u5b58\u50a8\u53d8\u66f4&#039;, e);<\/p>\n<p>});<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>\u5b58\u50a8\u9650\u5236<\/h4>\n<\/p>\n<p><p>localStorage \u548c sessionStorage \u90fd\u6709\u5b58\u50a8\u5bb9\u91cf\u9650\u5236\uff0c\u4e0d\u540c\u7684\u6d4f\u89c8\u5668\u53ef\u80fd\u6709\u4e0d\u540c\u7684\u9650\u5236\u3002\u4e00\u65e6\u8d85\u51fa\u9650\u5236\uff0c\u5c1d\u8bd5\u589e\u52a0\u5b58\u50a8\u5c06\u4f1a\u5bfc\u81f4\u9519\u8bef\u3002\u56e0\u6b64\uff0c\u5728\u8bbe\u8ba1\u7528\u8fd9\u4e9b\u65b9\u6cd5\u5b58\u50a8\u5927\u91cf\u6570\u636e\u7684\u5e94\u7528\u65f6\uff0c\u9700\u8981\u7279\u522b\u6ce8\u610f\u5b58\u50a8\u7a7a\u95f4\u4f7f\u7528\u60c5\u51b5\u3002<\/p>\n<\/p>\n<p><p>localStorage\u548csessionStorage\u5728\u524d\u7aef\u5f00\u53d1\u4e2d\u5e7f\u6cdb\u7528\u4e8e\u6570\u636e\u6301\u4e45\u5316\uff0c\u5982\u4fdd\u5b58\u7528\u6237\u8ba4\u8bc1\u72b6\u6001\u3001\u8868\u5355\u6570\u636e\u3001\u7528\u6237\u504f\u597d\u8bbe\u7f6e\u7b49\u3002\u5408\u7406\u5229\u7528\u8fd9\u4e24\u79cd\u5b58\u50a8\u65b9\u5f0f\uff0c\u53ef\u4ee5\u663e\u8457\u63d0\u5347\u7528\u6237\u4f53\u9a8c\uff0c\u4f46\u540c\u65f6\u4e5f\u9700\u8981\u6ce8\u610f\u5b89\u5168\u6027\uff0c\u6bd4\u5982\u4e0d\u5e94\u5c06\u654f\u611f\u4fe1\u606f\u660e\u6587\u5b58\u50a8\u5728localStorage\u6216sessionStorage\u4e2d\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p><strong>1. \u4ec0\u4e48\u662flocalStorage\u548csessionStorage\uff1f<\/strong><\/p>\n<p>localStorage\u548csessionStorage\u662fHTML5\u4e2d\u63d0\u4f9b\u7684\u4e24\u79cd\u7528\u4e8e\u5728Web\u6d4f\u89c8\u5668\u4e2d\u4fdd\u5b58\u6570\u636e\u7684API\u3002\u5b83\u4eec\u5206\u522b\u63d0\u4f9b\u4e86\u672c\u5730\u5b58\u50a8\u548c\u4f1a\u8bdd\u5b58\u50a8\u7684\u529f\u80fd\u3002<\/p>\n<p><strong>2. \u5982\u4f55\u4f7f\u7528localStorage\u6765\u4fdd\u5b58\u6570\u636e\uff1f<\/strong><\/p>\n<p>\u8981\u4f7f\u7528localStorage\u4fdd\u5b58\u6570\u636e\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528localStorage\u5bf9\u8c61\u7684setItem()\u65b9\u6cd5\u3002\u4f8b\u5982\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\u5c06\u4e00\u4e2a\u952e\u503c\u5bf9\u4fdd\u5b58\u5230localStorage\u4e2d\uff1a<\/p>\n<pre><code class=\"language-javascript\">localStorage.setItem(&quot;key&quot;, &quot;value&quot;);\n<\/code><\/pre>\n<p>\u60a8\u53ef\u4ee5\u4f7f\u7528getItem()\u65b9\u6cd5\u6765\u83b7\u53d6\u5df2\u4fdd\u5b58\u7684\u503c\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre><code class=\"language-javascript\">var value = localStorage.getItem(&quot;key&quot;);\n<\/code><\/pre>\n<p>\u60a8\u8fd8\u53ef\u4ee5\u4f7f\u7528removeItem()\u65b9\u6cd5\u6765\u5220\u9664\u7279\u5b9a\u7684\u952e\u503c\u5bf9\uff1a<\/p>\n<pre><code class=\"language-javascript\">localStorage.removeItem(&quot;key&quot;);\n<\/code><\/pre>\n<p><strong>3. sessionStorage\u548clocalStorage\u6709\u4ec0\u4e48\u533a\u522b\uff1f<\/strong><\/p>\n<p>sessionStorage\u548clocalStorage\u4e4b\u95f4\u7684\u533a\u522b\u5728\u4e8e\u6570\u636e\u7684\u751f\u547d\u5468\u671f\u548c\u4f5c\u7528\u57df\u3002sessionStorage\u4e2d\u7684\u6570\u636e\u4ec5\u5728\u5f53\u524d\u4f1a\u8bdd\u671f\u95f4\u6709\u6548\uff0c\u5373\u5f53\u7528\u6237\u5173\u95ed\u6d4f\u89c8\u5668\u6807\u7b7e\u65f6\u6570\u636e\u4f1a\u88ab\u6e05\u9664\u3002\u800clocalStorage\u4e2d\u7684\u6570\u636e\u53ef\u4ee5\u6c38\u4e45\u5b58\u5728\uff0c\u9664\u975e\u4f7f\u7528\u4ee3\u7801\u6216\u7528\u6237\u624b\u52a8\u5220\u9664\u3002<\/p>\n<p>\u53e6\u4e00\u4e2a\u533a\u522b\u662f\u4f5c\u7528\u57df\u7684\u4e0d\u540c\u3002sessionStorage\u4e2d\u7684\u6570\u636e\u5728\u540c\u4e00\u6d4f\u89c8\u5668\u6807\u7b7e\u9875\u6216\u7a97\u53e3\u4e2d\u5171\u4eab\uff0c\u800clocalStorage\u4e2d\u7684\u6570\u636e\u5728\u540c\u4e00\u57df\u540d\u4e0b\u7684\u6240\u6709\u6d4f\u89c8\u5668\u6807\u7b7e\u9875\u548c\u7a97\u53e3\u4e2d\u5171\u4eab\u3002<\/p>\n<p>\u6b64\u5916\uff0clocalStorage\u8fd8\u53ef\u4ee5\u901a\u8fc7setItem()\u65b9\u6cd5\u4fdd\u5b58\u590d\u6742\u7684JavaScript\u5bf9\u8c61\uff0c\u800csessionStorage\u53ea\u80fd\u4fdd\u5b58\u5b57\u7b26\u4e32\u7c7b\u578b\u7684\u6570\u636e\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"localStorage\u548csessionStorage\u662fWeb\u5b58\u50a8API\u63d0\u4f9b\u7684\u4e24\u79cd\u5728\u5ba2\u6237\u7aef\u5b58\u50a8\u6570\u636e\u7684\u65b9\u6cd5\u3002lo [&hellip;]","protected":false},"author":3,"featured_media":88461,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/88457"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=88457"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/88457\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/88461"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=88457"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=88457"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=88457"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}