<hr>

<p>The <dfn oldids=simple-encode-set>C0 control percent-encode set</dfn> are the <a>C0 controls</a>

and all <a>code points</a> greater than U+007E (~).

<p>A <dfn>percent-encode set</dfn> is a <a for=/>set</a> of <a for=/>code points</a>.

<p>The <dfn>fragment percent-encode set</dfn> is the <a>C0 control percent-encode set</a> and

U+0020 SPACE, U+0022 ("), U+003C (&lt;), U+003E (>), and U+0060 (`).

<p>The <dfn oldids=simple-encode-set>C0 control percent-encode set</dfn> is a

<a>percent-encode set</a> consisting of <a>C0 controls</a> and all <a>code points</a> greater than

U+007E (~).

<p>The <dfn>query percent-encode set</dfn> is the <a>C0 control percent-encode set</a> and

U+0020 SPACE, U+0022 ("), U+0023 (#), U+003C (&lt;), and U+003E (>).

<p>The <dfn>fragment percent-encode set</dfn> is a <a>percent-encode set</a> consisting of the

<a>C0 control percent-encode set</a> and U+0020 SPACE, U+0022 ("), U+003C (&lt;), U+003E (>), and

U+0060 (`).

<p>The <dfn>query percent-encode set</dfn> is a <a>percent-encode set</a> consisting of the

<a>C0 control percent-encode set</a> and U+0020 SPACE, U+0022 ("), U+0023 (#), U+003C (&lt;), and

U+003E (>).

<p class=note>The <a>query percent-encode set</a> cannot be defined in terms of the

<a>fragment percent-encode set</a> due to the omission of U+0060 (`).

<p>The <dfn>special-query percent-encode set</dfn> is the <a>query percent-encode set</a> and

U+0027 (').

<p>The <dfn>special-query percent-encode set</dfn> is a <a>percent-encode set</a> consisting of

the <a>query percent-encode set</a> and U+0027 (').

<p>The <dfn oldids=default-encode-set>path percent-encode set</dfn> is the

<a>query percent-encode set</a> and U+003F (?), U+005E (^), U+0060 (`), U+007B ({), and U+007D (}).

<p>The <dfn oldids=default-encode-set>path percent-encode set</dfn> is a <a>percent-encode set</a>

consisting of the <a>query percent-encode set</a> and U+003F (?), U+005E (^), U+0060 (`),

U+007B ({), and U+007D (}).

<p>The <dfn oldids=userinfo-encode-set>userinfo percent-encode set</dfn> is the

<a>path percent-encode set</a> and U+002F (/), U+003A (:), U+003B (;), U+003D (=), U+0040 (@),

U+005B ([) to U+005D (]), inclusive, and U+007C (|).

<p>The <dfn oldids=userinfo-encode-set>userinfo percent-encode set</dfn> is a

<a>percent-encode set</a> consisting of the <a>path percent-encode set</a> and U+002F (/),

U+003A (:), U+003B (;), U+003D (=), U+0040 (@), U+005B ([) to U+005D (]), inclusive, and U+007C (|).

<p>The <dfn export>component percent-encode set</dfn> is the <a>userinfo percent-encode set</a> and

U+0024 ($) to U+0026 (&amp;), inclusive, U+002B (+), and U+002C (,).

<p>The <dfn export>component percent-encode set</dfn> is a <a>percent-encode set</a> consisting of

the <a>userinfo percent-encode set</a> and U+0024 ($) to U+0026 (&amp;), inclusive, U+002B (+), and

U+002C (,).

<p class=note>This is used by <cite>HTML</cite> for

{{NavigatorContentUtils/registerProtocolHandler()}}, and could also be used by other standards to

<a for=string>UTF-8 percent-encode</a> gives identical results to JavaScript's

<a method><code>encodeURIComponent()</code> [sic]</a>. [[HTML]] [[ECMA-262]]

<p>The <dfn><code>application/x-www-form-urlencoded</code> percent-encode set</dfn> is the

<a>component percent-encode set</a> and U+0021 (!), U+0027 (') to U+0029 RIGHT PARENTHESIS,

inclusive, and U+007E (~).

<p>The <dfn><code>application/x-www-form-urlencoded</code> percent-encode set</dfn> is a

<a>percent-encode set</a> consisting of the <a>component percent-encode set</a> and U+0021 (!),

U+0027 (') to U+0029 RIGHT PARENTHESIS, inclusive, and U+007E (~).

<p class=note>The <a><code>application/x-www-form-urlencoded</code> percent-encode set</a> contains

all code points, except the <a>ASCII alphanumeric</a>, U+002A (*), U+002D (-), U+002E (.), and

U+005F (_).

<div algorithm>

<p>To <dfn for=string>percent-encode after encoding</dfn>, given an <a for=/>encoding</a>

<var>encoding</var>, <a for=/>scalar value string</a> <var>input</var>, a

<var>percentEncodeSet</var>, and an optional boolean <var>spaceAsPlus</var> (default false):

<var>encoding</var>, <a for=/>scalar value string</a> <var>input</var>, and a

<a>percent-encode set</a> <var>percentEncodeSet</var>:

<ol>

<li><p><a for=/>Assert</a>: <var>encoding</var> is <a for=/>UTF-8</a> or

<var>percentEncodeSet</var> is <a>special-query percent-encode set</a> or

<a><code>application/x-www-form-urlencoded</code> percent-encode set</a>.

<li><p>Let <var>spaceAsPlus</var> be true if <var>percentEncodeSet</var> is

<a><code>application/x-www-form-urlencoded</code> percent-encode set</a>; otherwise false.

<li><p>Let <var>encoder</var> be the result of <a>getting an encoder</a> from <var>encoding</var>.

<li><p>Let <var>inputQueue</var> be <var>input</var> converted to an <a for=/>I/O queue</a>.

<td>0xE2 0x80 0xBD 0x25 0x2E

<tr>

<td rowspan=3><a for=string>Percent-encode after encoding</a> with <a>Shift_JIS</a>,

<var>input</var>, and the <a>userinfo percent-encode set</a>

<var>input</var>, and the <a>special-query percent-encode set</a>

<td>"<code> </code>"

<td>"<code>%20</code>"

<tr>

<td>"<code>%26%238253%3B</code>"

<tr>

<td><a for=string>Percent-encode after encoding</a> with <a>ISO-2022-JP</a>, <var>input</var>,

and the <a>userinfo percent-encode set</a>

and the <a>special-query percent-encode set</a>

<td>"<code>¥</code>"

<td>"<code>%1B(J\%1B(B</code>"

<tr>

<td><a for=string>Percent-encode after encoding</a> with <a>Shift_JIS</a>, <var>input</var>, the

<a>userinfo percent-encode set</a>, and true

<td><a for=string>Percent-encode after encoding</a> with <a>Shift_JIS</a>, <var>input</var>, and

the <a><code>application/x-www-form-urlencoded</code> percent-encode set</a>

<td>"<code>1+1 ≡ 2%20‽</code>"

<td>"<code>1+1+%81%DF+2%20%26%238253%3B</code>"

<td>"<code>1%2B1+%81%DF+2%2520%26%238253%3B</code>"

<tr>

<td rowspan=2><a for="code point">UTF-8 percent-encode</a> <var>input</var> using the

<a>userinfo percent-encode set</a>

<a for=/>scalar value strings</a>.

<li><p>Let <var>name</var> be the result of running

<a for=string>percent-encode after encoding</a> with <var>encoding</var>,

<var>tuple</var>'s name, the

<a><code>application/x-www-form-urlencoded</code> percent-encode set</a>, and true.

<a for=string>percent-encode after encoding</a> with <var>encoding</var>, <var>tuple</var>'s

name, and the <a><code>application/x-www-form-urlencoded</code> percent-encode set</a>.

<li><p>Let <var>value</var> be the result of running

<a for=string>percent-encode after encoding</a> with <var>encoding</var>, <var>tuple</var>'s

value, the <a><code>application/x-www-form-urlencoded</code> percent-encode set</a>, and true.

value, and the <a><code>application/x-www-form-urlencoded</code> percent-encode set</a>.

<li><p>If <var>output</var> is not the empty string, then append U+0026 (&amp;) to

<var>output</var>.

Michal Bukovský,

Michel Suignard,

Mikaël Geljić,

Nikita Skovoroda,<!-- ChALkeR; GitHub -->

Noah Levitt,

Peter Occil,

Philip Jägenstedt,