aboutsummaryrefslogtreecommitdiff
path: root/files/ja/web/javascript/reference/global_objects/string/fromcodepoint/index.html
diff options
context:
space:
mode:
authorMasahiro FUJIMOTO <mfujimot@gmail.com>2021-09-19 00:43:31 +0900
committerMasahiro FUJIMOTO <mfujimot@gmail.com>2021-09-27 09:36:29 +0900
commit8f1bc6e84b137a8970cc78bb84270d7701f6d2e9 (patch)
tree831cdee31cba865f1eae79a5fbded117fc36f32f /files/ja/web/javascript/reference/global_objects/string/fromcodepoint/index.html
parentdc150b0d7beb18d0addc54a60563f40c05fdea5b (diff)
downloadtranslated-content-8f1bc6e84b137a8970cc78bb84270d7701f6d2e9.tar.gz
translated-content-8f1bc6e84b137a8970cc78bb84270d7701f6d2e9.tar.bz2
translated-content-8f1bc6e84b137a8970cc78bb84270d7701f6d2e9.zip
Global_Objects/String/fromCodePoint を Markdown へ変換準備
Diffstat (limited to 'files/ja/web/javascript/reference/global_objects/string/fromcodepoint/index.html')
-rw-r--r--files/ja/web/javascript/reference/global_objects/string/fromcodepoint/index.html147
1 files changed, 0 insertions, 147 deletions
diff --git a/files/ja/web/javascript/reference/global_objects/string/fromcodepoint/index.html b/files/ja/web/javascript/reference/global_objects/string/fromcodepoint/index.html
deleted file mode 100644
index 002ef04424..0000000000
--- a/files/ja/web/javascript/reference/global_objects/string/fromcodepoint/index.html
+++ /dev/null
@@ -1,147 +0,0 @@
----
-title: String.fromCodePoint()
-slug: Web/JavaScript/Reference/Global_Objects/String/fromCodePoint
-tags:
- - ECMAScript 2015
- - JavaScript
- - Method
- - Reference
- - String
-translation_of: Web/JavaScript/Reference/Global_Objects/String/fromCodePoint
----
-<div>{{JSRef}}</div>
-
-<p><strong><code>String.fromCodePoint()</code></strong> 静的メソッドは指定されたコードポイントのシーケンスを使って生成された文字列を返します。</p>
-
-<div>{{EmbedInteractiveExample("pages/js/string-fromcodepoint.html")}}</div>
-
-
-
-<h2 id="Syntax" name="Syntax">構文</h2>
-
-<pre class="syntaxbox"><code>String.fromCodePoint(<var>num1</var>[, ...[, <var>numN</var>]])</code></pre>
-
-<h3 id="Parameters" name="Parameters">引数</h3>
-
-<dl>
- <dt><code>num1, ..., num<em>N</em></code></dt>
- <dd>コードポイントのシーケンスです。</dd>
-</dl>
-
-<h3 id="Return_value" name="Return_value">戻り値</h3>
-
-<p>指定されたコードポイントのシーケンスを使って生成された文字列です。</p>
-
-<h3 id="Exceptions" name="Exceptions">例外</h3>
-
-<ul>
- <li>無効な Unicode コードポイントを与えられた場合、{{jsxref("Errors/Not_a_codepoint", "RangeError")}} (例: "RangeError: NaN is not a valid code point" )がスローされます。</li>
-</ul>
-
-<h2 id="Description" name="Description">説明</h2>
-
-<p>このメソッドは {{jsxref("String")}} オブジェクトではなく文字列を返します。</p>
-
-<p><code>fromCodePoint()</code> メソッドは {{jsxref("String")}} の静的なメソッドなので、自ら生成した {{jsxref("String")}} オブジェクトのメソッドとしてではなく、常に <code>String.fromCodePoint()</code> として使用してください。</p>
-
-<h2 id="Examples" name="Examples">例</h2>
-
-<h3 id="Using_fromCharCode" name="Using_fromCharCode"><code>fromCodePoint()</code> を使う</h3>
-
-<pre class="brush: js">String.fromCodePoint(42); // "*"
-String.fromCodePoint(65, 90); // "AZ"
-String.fromCodePoint(0x404); // "\u0404"
-String.fromCodePoint(0x2F804); // "\uD87E\uDC04"
-String.fromCodePoint(194564); // "\uD87E\uDC04"
-String.fromCodePoint(0x1D306, 0x61, 0x1D307) // "\uD834\uDF06a\uD834\uDF07"
-
-String.fromCodePoint('_'); // RangeError
-String.fromCodePoint(Infinity); // RangeError
-String.fromCodePoint(-1); // RangeError
-String.fromCodePoint(3.14); // RangeError
-String.fromCodePoint(3e-2); // RangeError
-String.fromCodePoint(NaN); // RangeError
-</pre>
-
-<pre class="brush: js">// String.fromCharCode() alone cannot get the character at such a high code point
-// The following, on the other hand, can return a 4-byte character as well as the
-// usual 2-byte ones (i.e., it can return a single character which actually has
-// a string length of 2 instead of 1!)
-console.log(String.fromCodePoint(0x2F804)); // or 194564 in decimal
-</pre>
-
-<h2 id="Polyfill" name="Polyfill">ポリフィル</h2>
-
-<p><code>String.fromCodePoint</code> メソッドは ECMAScript 2015 で追加されました。まだすべての Web ブラウザーや環境でサポートされていないかもしれません。互換性のために次のコードを使用してください。</p>
-
-<pre class="brush: js">if (!String.fromCodePoint) (function(stringFromCharCode) {
- var fromCodePoint = function(_) {
- var codeUnits = [], codeLen = 0, result = "";
- for (var index=0, len = arguments.length; index !== len; ++index) {
- var codePoint = +arguments[index];
- // correctly handles all cases including `NaN`, `-Infinity`, `+Infinity`
- // The surrounding `!(...)` is required to correctly handle `NaN` cases
- // The (codePoint&gt;&gt;&gt;0) === codePoint clause handles decimals and negatives
- if (!(codePoint &lt; 0x10FFFF &amp;&amp; (codePoint&gt;&gt;&gt;0) === codePoint))
- throw RangeError("Invalid code point: " + codePoint);
- if (codePoint &lt;= 0xFFFF) { // BMP code point
- codeLen = codeUnits.push(codePoint);
- } else { // Astral code point; split in surrogate halves
- // https://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
- codePoint -= 0x10000;
- codeLen = codeUnits.push(
- (codePoint &gt;&gt; 10) + 0xD800, // highSurrogate
- (codePoint % 0x400) + 0xDC00 // lowSurrogate
- );
- }
- if (codeLen &gt;= 0x3fff) {
- result += stringFromCharCode.apply(null, codeUnits);
- codeUnits.length = 0;
- }
- }
- return result + stringFromCharCode.apply(null, codeUnits);
- };
- try { // IE 8 only supports `Object.defineProperty` on DOM elements
- Object.defineProperty(String, "fromCodePoint", {
- "value": fromCodePoint, "configurable": true, "writable": true
- });
- } catch(e) {
- String.fromCodePoint = fromCodePoint;
- }
-}(String.fromCharCode));
-</pre>
-
-<h2 id="Specifications" name="Specifications">仕様</h2>
-
-<table class="standard-table">
- <tbody>
- <tr>
- <th scope="col">仕様</th>
- <th scope="col">状況</th>
- <th scope="col">コメント</th>
- </tr>
- <tr>
- <td>{{SpecName('ES2015', '#sec-string.fromcodepoint', 'String.fromCodePoint')}}</td>
- <td>{{Spec2('ES2015')}}</td>
- <td>初期定義</td>
- </tr>
- <tr>
- <td>{{SpecName('ESDraft', '#sec-string.fromcodepoint', 'String.fromCodePoint')}}</td>
- <td>{{Spec2('ESDraft')}}</td>
- <td></td>
- </tr>
- </tbody>
-</table>
-
-<h2 id="Browser_compatibility" name="Browser_compatibility">ブラウザー実装状況</h2>
-
-<p>{{Compat("javascript.builtins.String.fromCodePoint")}}</p>
-
-<h2 id="See_also" name="See_also">関連情報</h2>
-
-<ul>
- <li>{{jsxref("String.fromCharCode()")}}</li>
- <li>{{jsxref("String.prototype.charAt()")}}</li>
- <li>{{jsxref("String.prototype.codePointAt()")}}</li>
- <li>{{jsxref("String.prototype.charCodeAt()")}}</li>
-</ul>