{ "type": "module", "source": "doc/api/querystring.md", "modules": [ { "textRaw": "Query string", "name": "querystring", "introduced_in": "v0.1.25", "stability": 3, "stabilityText": "Legacy", "desc": "<p><strong>Source Code:</strong> <a href=\"https://github.com/nodejs/node/blob/v16.20.2/lib/querystring.js\">lib/querystring.js</a></p>\n<p>The <code>node:querystring</code> module provides utilities for parsing and formatting URL\nquery strings. It can be accessed using:</p>\n<pre><code class=\"language-js\">const querystring = require('node:querystring');\n</code></pre>\n<p>The <code>querystring</code> API is considered Legacy. While it is still maintained,\nnew code should use the <a href=\"url.html#class-urlsearchparams\" class=\"type\">&lt;URLSearchParams&gt;</a> API instead.</p>", "methods": [ { "textRaw": "`querystring.decode()`", "type": "method", "name": "decode", "meta": { "added": [ "v0.1.99" ], "changes": [] }, "signatures": [ { "params": [] } ], "desc": "<p>The <code>querystring.decode()</code> function is an alias for <code>querystring.parse()</code>.</p>" }, { "textRaw": "`querystring.encode()`", "type": "method", "name": "encode", "meta": { "added": [ "v0.1.99" ], "changes": [] }, "signatures": [ { "params": [] } ], "desc": "<p>The <code>querystring.encode()</code> function is an alias for <code>querystring.stringify()</code>.</p>" }, { "textRaw": "`querystring.escape(str)`", "type": "method", "name": "escape", "meta": { "added": [ "v0.1.25" ], "changes": [] }, "signatures": [ { "params": [ { "textRaw": "`str` {string}", "name": "str", "type": "string" } ] } ], "desc": "<p>The <code>querystring.escape()</code> method performs URL percent-encoding on the given\n<code>str</code> in a manner that is optimized for the specific requirements of URL\nquery strings.</p>\n<p>The <code>querystring.escape()</code> method is used by <code>querystring.stringify()</code> and is\ngenerally not expected to be used directly. It is exported primarily to allow\napplication code to provide a replacement percent-encoding implementation if\nnecessary by assigning <code>querystring.escape</code> to an alternative function.</p>" }, { "textRaw": "`querystring.parse(str[, sep[, eq[, options]]])`", "type": "method", "name": "parse", "meta": { "added": [ "v0.1.25" ], "changes": [ { "version": "v8.0.0", "pr-url": "https://github.com/nodejs/node/pull/10967", "description": "Multiple empty entries are now parsed correctly (e.g. `&=&=`)." }, { "version": "v6.0.0", "pr-url": "https://github.com/nodejs/node/pull/6055", "description": "The returned object no longer inherits from `Object.prototype`." }, { "version": [ "v6.0.0", "v4.2.4" ], "pr-url": "https://github.com/nodejs/node/pull/3807", "description": "The `eq` parameter may now have a length of more than `1`." } ] }, "signatures": [ { "params": [ { "textRaw": "`str` {string} The URL query string to parse", "name": "str", "type": "string", "desc": "The URL query string to parse" }, { "textRaw": "`sep` {string} The substring used to delimit key and value pairs in the query string. **Default:** `'&'`.", "name": "sep", "type": "string", "default": "`'&'`", "desc": "The substring used to delimit key and value pairs in the query string." }, { "textRaw": "`eq` {string}. The substring used to delimit keys and values in the query string. **Default:** `'='`.", "name": "eq", "type": "string", "default": "`'='`", "desc": ". The substring used to delimit keys and values in the query string." }, { "textRaw": "`options` {Object}", "name": "options", "type": "Object", "options": [ { "textRaw": "`decodeURIComponent` {Function} The function to use when decoding percent-encoded characters in the query string. **Default:** `querystring.unescape()`.", "name": "decodeURIComponent", "type": "Function", "default": "`querystring.unescape()`", "desc": "The function to use when decoding percent-encoded characters in the query string." }, { "textRaw": "`maxKeys` {number} Specifies the maximum number of keys to parse. Specify `0` to remove key counting limitations. **Default:** `1000`.", "name": "maxKeys", "type": "number", "default": "`1000`", "desc": "Specifies the maximum number of keys to parse. Specify `0` to remove key counting limitations." } ] } ] } ], "desc": "<p>The <code>querystring.parse()</code> method parses a URL query string (<code>str</code>) into a\ncollection of key and value pairs.</p>\n<p>For example, the query string <code>'foo=bar&#x26;abc=xyz&#x26;abc=123'</code> is parsed into:</p>\n<!-- eslint-skip -->\n<pre><code class=\"language-js\">{\n foo: 'bar',\n abc: ['xyz', '123']\n}\n</code></pre>\n<p>The object returned by the <code>querystring.parse()</code> method <em>does not</em>\nprototypically inherit from the JavaScript <code>Object</code>. This means that typical\n<code>Object</code> methods such as <code>obj.toString()</code>, <code>obj.hasOwnProperty()</code>, and others\nare not defined and <em>will not work</em>.</p>\n<p>By default, percent-encoded characters within the query string will be assumed\nto use UTF-8 encoding. If an alternative character encoding is used, then an\nalternative <code>decodeURIComponent</code> option will need to be specified:</p>\n<pre><code class=\"language-js\">// Assuming gbkDecodeURIComponent function already exists...\n\nquerystring.parse('w=%D6%D0%CE%C4&#x26;foo=bar', null, null,\n { decodeURIComponent: gbkDecodeURIComponent });\n</code></pre>" }, { "textRaw": "`querystring.stringify(obj[, sep[, eq[, options]]])`", "type": "method", "name": "stringify", "meta": { "added": [ "v0.1.25" ], "changes": [] }, "signatures": [ { "params": [ { "textRaw": "`obj` {Object} The object to serialize into a URL query string", "name": "obj", "type": "Object", "desc": "The object to serialize into a URL query string" }, { "textRaw": "`sep` {string} The substring used to delimit key and value pairs in the query string. **Default:** `'&'`.", "name": "sep", "type": "string", "default": "`'&'`", "desc": "The substring used to delimit key and value pairs in the query string." }, { "textRaw": "`eq` {string}. The substring used to delimit keys and values in the query string. **Default:** `'='`.", "name": "eq", "type": "string", "default": "`'='`", "desc": ". The substring used to delimit keys and values in the query string." }, { "textRaw": "`options`", "name": "options", "options": [ { "textRaw": "`encodeURIComponent` {Function} The function to use when converting URL-unsafe characters to percent-encoding in the query string. **Default:** `querystring.escape()`.", "name": "encodeURIComponent", "type": "Function", "default": "`querystring.escape()`", "desc": "The function to use when converting URL-unsafe characters to percent-encoding in the query string." } ] } ] } ], "desc": "<p>The <code>querystring.stringify()</code> method produces a URL query string from a\ngiven <code>obj</code> by iterating through the object's \"own properties\".</p>\n<p>It serializes the following types of values passed in <code>obj</code>:\n<a href=\"https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type\" class=\"type\">&lt;string&gt;</a> | <a href=\"https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type\" class=\"type\">&lt;number&gt;</a> | <a href=\"https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/BigInt\" class=\"type\">&lt;bigint&gt;</a> | <a href=\"https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type\" class=\"type\">&lt;boolean&gt;</a> | <a href=\"https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type\" class=\"type\">&lt;string[]&gt;</a> | <a href=\"https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type\" class=\"type\">&lt;number[]&gt;</a> | <a href=\"https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/BigInt\" class=\"type\">&lt;bigint[]&gt;</a> | <a href=\"https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type\" class=\"type\">&lt;boolean[]&gt;</a>\nThe numeric values must be finite. Any other input values will be coerced to\nempty strings.</p>\n<pre><code class=\"language-js\">querystring.stringify({ foo: 'bar', baz: ['qux', 'quux'], corge: '' });\n// Returns 'foo=bar&#x26;baz=qux&#x26;baz=quux&#x26;corge='\n\nquerystring.stringify({ foo: 'bar', baz: 'qux' }, ';', ':');\n// Returns 'foo:bar;baz:qux'\n</code></pre>\n<p>By default, characters requiring percent-encoding within the query string will\nbe encoded as UTF-8. If an alternative encoding is required, then an alternative\n<code>encodeURIComponent</code> option will need to be specified:</p>\n<pre><code class=\"language-js\">// Assuming gbkEncodeURIComponent function already exists,\n\nquerystring.stringify({ w: '中文', foo: 'bar' }, null, null,\n { encodeURIComponent: gbkEncodeURIComponent });\n</code></pre>" }, { "textRaw": "`querystring.unescape(str)`", "type": "method", "name": "unescape", "meta": { "added": [ "v0.1.25" ], "changes": [] }, "signatures": [ { "params": [ { "textRaw": "`str` {string}", "name": "str", "type": "string" } ] } ], "desc": "<p>The <code>querystring.unescape()</code> method performs decoding of URL percent-encoded\ncharacters on the given <code>str</code>.</p>\n<p>The <code>querystring.unescape()</code> method is used by <code>querystring.parse()</code> and is\ngenerally not expected to be used directly. It is exported primarily to allow\napplication code to provide a replacement decoding implementation if\nnecessary by assigning <code>querystring.unescape</code> to an alternative function.</p>\n<p>By default, the <code>querystring.unescape()</code> method will attempt to use the\nJavaScript built-in <code>decodeURIComponent()</code> method to decode. If that fails,\na safer equivalent that does not throw on malformed URLs will be used.</p>" } ], "type": "module", "displayName": "querystring" } ] }