132 lines
5 KiB
HTML
132 lines
5 KiB
HTML
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<title> parseQueryString(string) - Mithril.js</title>
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<h1 id="parsequerystringstring"><a href="#parsequerystringstring">parseQueryString(string)</a></h1>
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<ul>
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<li>Core<ul>
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<li><a href="hyperscript.html">m</a></li>
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<li><a href="render.html">m.render</a></li>
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<li><a href="mount.html">m.mount</a></li>
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<li><a href="route.html">m.route</a></li>
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<li><a href="request.html">m.request</a></li>
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<li><a href="jsonp.html">m.jsonp</a></li>
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<li><strong><a href="parseQueryString.html">m.parseQueryString</a></strong><ul>
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<li><a href="#description">Description</a></li>
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<li><a href="#signature">Signature</a></li>
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<li><a href="#how-it-works">How it works</a></li>
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</ul>
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</li>
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<li><a href="buildQueryString.html">m.buildQueryString</a></li>
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<li><a href="trust.html">m.trust</a></li>
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<li><a href="fragment.html">m.fragment</a></li>
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<li><a href="https://github.com/MithrilJS/mithril.js/blob/master/ospec">Ospec</a></li>
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</li>
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</ul>
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<hr>
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<h3 id="description"><a href="#description">Description</a></h3>
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<p>Turns a string of the form <code>?a=1&b=2</code> to an object</p>
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<pre><code class="language-javascript">var object = m.parseQueryString("a=1&b=2")
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// {a: "1", b: "2"}</code></pre>
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<hr>
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<h3 id="signature"><a href="#signature">Signature</a></h3>
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<p><code>object = m.parseQueryString(string, object)</code></p>
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<table>
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<thead>
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<tr>
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<th>Argument</th>
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<th>Type</th>
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<th>Required</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody><tr>
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<td><code>string</code></td>
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<td><code>String</code></td>
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<td>Yes</td>
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<td>A querystring</td>
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</tr>
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<tr>
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<td><code>object</code></td>
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<td><code>Object</code></td>
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<td>No</td>
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<td>An existing key-value map to merge values into, potentially from a previous <code>m.parseQueryString</code> call</td>
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</tr>
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<tr>
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<td><strong>returns</strong></td>
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<td><code>Object</code></td>
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<td></td>
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<td>A key-value map, <code>object</code> if provided</td>
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</tr>
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</tbody></table>
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<p><a href="signatures.html">How to read signatures</a></p>
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<hr>
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<h3 id="how-it-works"><a href="#how-it-works">How it works</a></h3>
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<p>The <code>m.parseQueryString</code> method creates an object from a querystring. It is useful for handling data from URL</p>
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<pre><code class="language-javascript">var data = m.parseQueryString("a=hello&b=world")
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// data is {a: "hello", b: "world"}</code></pre>
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<h4 id="boolean-type-casting"><a href="#boolean-type-casting">Boolean type casting</a></h4>
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<p>This method attempts to cast boolean values if possible. This helps prevents bugs related to loose truthiness and unintended type casts.</p>
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<pre><code class="language-javascript">var data = m.parseQueryString("a=true&b=false")
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// data is {a: true, b: false}</code></pre>
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<h4 id="leading-question-mark-tolerance"><a href="#leading-question-mark-tolerance">Leading question mark tolerance</a></h4>
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<p>For convenience, the <code>m.parseQueryString</code> method ignores a leading question mark, if present:</p>
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<pre><code class="language-javascript">var data = m.parseQueryString("?a=hello&b=world")
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// data is {a: "hello", b: "world"}</code></pre>
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<h4 id="deep-data-structures"><a href="#deep-data-structures">Deep data structures</a></h4>
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<p>Querystrings that contain bracket notation are correctly parsed into deep data structures</p>
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<pre><code class="language-javascript">m.parseQueryString("a[0]=hello&a[1]=world")
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// data is {a: ["hello", "world"]}</code></pre>
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<hr />
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<small>License: MIT. © Leo Horie.</small>
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