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import{_ as i,o as a,c as t,ae as n}from"./chunks/framework.C8AWLET_.js";const g=JSON.parse('{"title":"Persistence Tool: _storage","description":"","frontmatter":{},"headers":[],"relativePath":"plugins/core.storage.md","filePath":"plugins/core.storage.md"}'),e={name:"plugins/core.storage.md"};function h(l,s,p,k,r,o){return a(),t("div",null,[...s[0]||(s[0]=[n(`<h1 id="persistence-tool-storage" tabindex="-1">Persistence Tool: <code>_storage</code> <a class="header-anchor" href="#persistence-tool-storage" aria-label="Permalink to &quot;Persistence Tool: \`_storage\`&quot;">​</a></h1><p>The Storage plugin synchronizes a signal with a specific key in your browser&#39;s <code>localStorage</code>. It handles both the <strong>initial hydration</strong> (loading data when the app starts) and <strong>automatic saving</strong> whenever the signal&#39;s value changes.</p><h2 id="_1-core-concept" tabindex="-1">1. Core Concept <a class="header-anchor" href="#_1-core-concept" aria-label="Permalink to &quot;1. Core Concept&quot;">​</a></h2><p>When you &quot;attach&quot; a signal to <code>_storage</code>, two things happen:</p><ol><li><strong>Hydration:</strong> The plugin checks if the key already exists in <code>localStorage</code>. If it does, it parses the JSON and updates the signal immediately.</li><li><strong>Reactive Sync:</strong> It creates a reactive watcher that stringifies and saves the signal&#39;s value to the disk every time it is updated.</li></ol><hr><h2 id="_2-installation" tabindex="-1">2. Installation <a class="header-anchor" href="#_2-installation" aria-label="Permalink to &quot;2. Installation&quot;">​</a></h2><p>Register the <code>Storage</code> plugin in your <code>main.js</code>. Since this is a logic-only plugin, it doesn&#39;t require any CSS or UI dependencies.</p><div class="language-javascript vp-adaptive-theme"><button title="Copy Code" class="copy"></button><span class="lang">javascript</span><pre class="shiki shiki-themes github-light github-dark vp-code" tabindex="0"><code><span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">import</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> { $ } </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">from</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;sigpro&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">import</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> { Storage } </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">from</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;sigpro/plugins&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">$.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">plugin</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(Storage).</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">then</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(() </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=&gt;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> import</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;./App.js&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">).</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">then</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">app</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =&gt;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> $.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">mount</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(app.default));</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">});</span></span></code></pre></div><div class="vp-code-group vp-adaptive-theme"><div class="tabs"><input type="radio" name="group-ve29n" id="tab-r-zQL8a" checked><label data-title="NPM" for="tab-r-zQL8a">NPM</label><input type="radio" name="group-ve29n" id="tab-EpinxCs"><label data-title="PNPM" for="tab-EpinxCs">PNPM</label><input type="radio" name="group-ve29n" id="tab-68POdFk"><label data-title="Yarn" for="tab-68POdFk">Yarn</label><input type="radio" name="group-ve29n" id="tab-mjku06r"><label data-title="Bun" for="tab-mjku06r">Bun</label></div><div class="blocks"><div class="language-bash vp-adaptive-theme active"><button title="Copy Code" class="copy"></button><span class="lang">bash</span><pre class="shiki shiki-themes github-light github-dark vp-code" tabindex="0"><code><span class="line"><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">npm</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> install</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> sigpro</span></span></code></pre></div><div class="language-bash vp-adaptive-theme"><button title="Copy Code" class="copy"></button><span class="lang">bash</span><pre class="shiki shiki-themes github-light github-dark vp-code" tabindex="0"><code><span class="line"><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">pnpm</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> add</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> sigpro</span></span></code></pre></div><div class="language-bash vp-adaptive-theme"><button title="Copy Code" class="copy"></button><span class="lang">bash</span><pre class="shiki shiki-themes github-light github-dark vp-code" tabindex="0"><code><span class="line"><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">yarn</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> add</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> sigpro</span></span></code></pre></div><div class="language-bash vp-adaptive-theme"><button title="Copy Code" class="copy"></button><span class="lang">bash</span><pre class="shiki shiki-themes github-light github-dark vp-code" tabindex="0"><code><span class="line"><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">bun</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> add</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> sigpro</span></span></code></pre></div></div></div><hr><h2 id="_3-basic-usage" tabindex="-1">3. Basic Usage <a class="header-anchor" href="#_3-basic-usage" aria-label="Permalink to &quot;3. Basic Usage&quot;">​</a></h2><p>You can wrap any signal with <code>_storage</code>. It is common practice to do this right after creating the signal.</p><div class="language-javascript vp-adaptive-theme"><button title="Copy Code" class="copy"></button><span class="lang">javascript</span><pre class="shiki shiki-themes github-light github-dark vp-code" tabindex="0"><code><span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">export</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> default</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> () </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=&gt;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> // 1. Create a signal with a default value</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> const</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> $theme</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> $</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">( </span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;light&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> );</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> // 2. Persist it. If &#39;user_theme&#39; exists in localStorage, </span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> // $theme will be updated to that value instantly.</span></span>
<span class="line"><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> _storage</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">($theme, </span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;user_theme&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">);</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> return</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> div</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">({ </span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">class</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">: () </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=&gt;</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> \`app-\${</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">$theme</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">()</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">}\`</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> }, [</span></span>
<span class="line"><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> h1</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">\`Current Theme: \${</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">$theme</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">()</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">}\`</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">),</span></span>
<span class="line"><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> button</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">({ </span></span>
<span class="line"><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> onclick</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">: () </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=&gt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> $theme</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">t</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =&gt;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> t </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">===</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;light&#39;</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> ?</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;dark&#39;</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> :</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;light&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">) </span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> }, </span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&quot;Toggle Theme&quot;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> ]);</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">};</span></span></code></pre></div><hr><h2 id="_4-complex-data-objects-arrays" tabindex="-1">4. Complex Data (Objects &amp; Arrays) <a class="header-anchor" href="#_4-complex-data-objects-arrays" aria-label="Permalink to &quot;4. Complex Data (Objects &amp; Arrays)&quot;">​</a></h2><p>Since the plugin uses <code>JSON.parse</code> and <code>JSON.stringify</code> internally, it works perfectly with complex state structures.</p><div class="language-javascript vp-adaptive-theme"><button title="Copy Code" class="copy"></button><span class="lang">javascript</span><pre class="shiki shiki-themes github-light github-dark vp-code" tabindex="0"><code><span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">const</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> $settings</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> $</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">({ </span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> notifications: </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">true</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> fontSize: </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">16</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> </span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">});</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">// Automatically saves the whole object whenever any property changes</span></span>
<span class="line"><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">_storage</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">($settings, </span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;app_settings&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">);</span></span></code></pre></div><hr><h2 id="_5-why-use-storage" tabindex="-1">5. Why use <code>_storage</code>? <a class="header-anchor" href="#_5-why-use-storage" aria-label="Permalink to &quot;5. Why use \`_storage\`?&quot;">​</a></h2><ol><li><strong>Zero Boilerplate:</strong> You don&#39;t need to manually write <code>localStorage.getItem</code> or <code>setItem</code> logic inside your components.</li><li><strong>Chaining:</strong> Because <code>_storage</code> returns the signal, you can persist it inline.</li><li><strong>Error Resilience:</strong> It includes a built-in <code>try/catch</code> block to prevent your app from crashing if the stored JSON is corrupted.</li><li><strong>Surgical Persistence:</strong> Only the signals you explicitly mark for storage are saved, keeping your <code>localStorage</code> clean.</li></ol><hr><h2 id="_6-pro-tip-combining-with-debug" tabindex="-1">6. Pro Tip: Combining with Debug <a class="header-anchor" href="#_6-pro-tip-combining-with-debug" aria-label="Permalink to &quot;6. Pro Tip: Combining with Debug&quot;">​</a></h2><p>You can chain plugins to create a fully monitored and persistent state:</p><div class="language-javascript vp-adaptive-theme"><button title="Copy Code" class="copy"></button><span class="lang">javascript</span><pre class="shiki shiki-themes github-light github-dark vp-code" tabindex="0"><code><span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">const</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> $score</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> _storage</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">$</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">0</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">), </span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;high_score&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">);</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">// Now it&#39;s saved to disk AND logged to console on every change</span></span>
<span class="line"><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">_debug</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">($score, </span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&quot;Game Score&quot;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">);</span></span></code></pre></div>`,25)])])}const c=i(e,[["render",h]]);export{g as __pageData,c as default};
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