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<!DOCTYPE html>
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<title>polyglot.js</title>
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<body>
<div id="container">
<div id="background"></div>
<ul class="sections">
<li id="title">
<div class="annotation">
<h1>polyglot.js</h1>
</div>
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<pre><code>(c) <span class="hljs-number">2012</span><span class="hljs-number">-2018</span> Airbnb, Inc.
polyglot.js may be freely distributed under the terms <span class="hljs-keyword">of</span> the BSD
license. For all licensing information, details, and documention:
http:<span class="hljs-comment">//airbnb.github.com/polyglot.js</span>
</code></pre><p>Polyglot.js is an I18n helper library written in JavaScript, made to
work both in the browser and in Node. It provides a simple solution for
interpolation and pluralization, based off of Airbnb’s
experience adding I18n functionality to its Backbone.js and Node apps.</p>
<p>Polylglot is agnostic to your translation backend. It doesn’t perform any
translation; it simply gives you a way to manage translated phrases from
your client- or server-side JavaScript application.</p>
</div>
<div class="content"><div class='highlight'><pre><span class="hljs-meta">
'use strict'</span>;
<span class="hljs-keyword">var</span> forEach = <span class="hljs-built_in">require</span>(<span class="hljs-string">'for-each'</span>);
<span class="hljs-keyword">var</span> warning = <span class="hljs-built_in">require</span>(<span class="hljs-string">'warning'</span>);
<span class="hljs-keyword">var</span> has = <span class="hljs-built_in">require</span>(<span class="hljs-string">'has'</span>);
<span class="hljs-keyword">var</span> trim = <span class="hljs-built_in">require</span>(<span class="hljs-string">'string.prototype.trim'</span>);
<span class="hljs-keyword">var</span> warn = <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">warn</span>(<span class="hljs-params">message</span>) </span>{
warning(<span class="hljs-literal">false</span>, message);
};
<span class="hljs-keyword">var</span> replace = <span class="hljs-built_in">String</span>.prototype.replace;
<span class="hljs-keyword">var</span> split = <span class="hljs-built_in">String</span>.prototype.split;</pre></div></div>
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<h4 id="pluralization-methods">Pluralization methods</h4>
<p>The string that separates the different phrase possibilities.</p>
</div>
<div class="content"><div class='highlight'><pre><span class="hljs-keyword">var</span> delimiter = <span class="hljs-string">'||||'</span>;
<span class="hljs-keyword">var</span> russianPluralGroups = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">n</span>) </span>{
<span class="hljs-keyword">var</span> end = n % <span class="hljs-number">10</span>;
<span class="hljs-keyword">if</span> (n !== <span class="hljs-number">11</span> &amp;&amp; end === <span class="hljs-number">1</span>) {
<span class="hljs-keyword">return</span> <span class="hljs-number">0</span>;
}
<span class="hljs-keyword">if</span> (<span class="hljs-number">2</span> &lt;= end &amp;&amp; end &lt;= <span class="hljs-number">4</span> &amp;&amp; !(n &gt;= <span class="hljs-number">12</span> &amp;&amp; n &lt;= <span class="hljs-number">14</span>)) {
<span class="hljs-keyword">return</span> <span class="hljs-number">1</span>;
}
<span class="hljs-keyword">return</span> <span class="hljs-number">2</span>;
};</pre></div></div>
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<p>Mapping from pluralization group plural logic.</p>
</div>
<div class="content"><div class='highlight'><pre><span class="hljs-keyword">var</span> pluralTypes = {
<span class="hljs-attr">arabic</span>: <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">n</span>) </span>{</pre></div></div>
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<p><a href="http://www.arabeyes.org/Plural_Forms">http://www.arabeyes.org/Plural_Forms</a></p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">if</span> (n &lt; <span class="hljs-number">3</span>) { <span class="hljs-keyword">return</span> n; }
<span class="hljs-keyword">var</span> lastTwo = n % <span class="hljs-number">100</span>;
<span class="hljs-keyword">if</span> (lastTwo &gt;= <span class="hljs-number">3</span> &amp;&amp; lastTwo &lt;= <span class="hljs-number">10</span>) <span class="hljs-keyword">return</span> <span class="hljs-number">3</span>;
<span class="hljs-keyword">return</span> lastTwo &gt;= <span class="hljs-number">11</span> ? <span class="hljs-number">4</span> : <span class="hljs-number">5</span>;
},
<span class="hljs-attr">bosnian_serbian</span>: russianPluralGroups,
<span class="hljs-attr">chinese</span>: <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params"></span>) </span>{ <span class="hljs-keyword">return</span> <span class="hljs-number">0</span>; },
<span class="hljs-attr">croatian</span>: russianPluralGroups,
<span class="hljs-attr">french</span>: <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">n</span>) </span>{ <span class="hljs-keyword">return</span> n &gt; <span class="hljs-number">1</span> ? <span class="hljs-number">1</span> : <span class="hljs-number">0</span>; },
<span class="hljs-attr">german</span>: <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">n</span>) </span>{ <span class="hljs-keyword">return</span> n !== <span class="hljs-number">1</span> ? <span class="hljs-number">1</span> : <span class="hljs-number">0</span>; },
<span class="hljs-attr">russian</span>: russianPluralGroups,
<span class="hljs-attr">lithuanian</span>: <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">n</span>) </span>{
<span class="hljs-keyword">if</span> (n % <span class="hljs-number">10</span> === <span class="hljs-number">1</span> &amp;&amp; n % <span class="hljs-number">100</span> !== <span class="hljs-number">11</span>) { <span class="hljs-keyword">return</span> <span class="hljs-number">0</span>; }
<span class="hljs-keyword">return</span> n % <span class="hljs-number">10</span> &gt;= <span class="hljs-number">2</span> &amp;&amp; n % <span class="hljs-number">10</span> &lt;= <span class="hljs-number">9</span> &amp;&amp; (n % <span class="hljs-number">100</span> &lt; <span class="hljs-number">11</span> || n % <span class="hljs-number">100</span> &gt; <span class="hljs-number">19</span>) ? <span class="hljs-number">1</span> : <span class="hljs-number">2</span>;
},
<span class="hljs-attr">czech</span>: <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">n</span>) </span>{
<span class="hljs-keyword">if</span> (n === <span class="hljs-number">1</span>) { <span class="hljs-keyword">return</span> <span class="hljs-number">0</span>; }
<span class="hljs-keyword">return</span> (n &gt;= <span class="hljs-number">2</span> &amp;&amp; n &lt;= <span class="hljs-number">4</span>) ? <span class="hljs-number">1</span> : <span class="hljs-number">2</span>;
},
<span class="hljs-attr">polish</span>: <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">n</span>) </span>{
<span class="hljs-keyword">if</span> (n === <span class="hljs-number">1</span>) { <span class="hljs-keyword">return</span> <span class="hljs-number">0</span>; }
<span class="hljs-keyword">var</span> end = n % <span class="hljs-number">10</span>;
<span class="hljs-keyword">return</span> <span class="hljs-number">2</span> &lt;= end &amp;&amp; end &lt;= <span class="hljs-number">4</span> &amp;&amp; (n % <span class="hljs-number">100</span> &lt; <span class="hljs-number">10</span> || n % <span class="hljs-number">100</span> &gt;= <span class="hljs-number">20</span>) ? <span class="hljs-number">1</span> : <span class="hljs-number">2</span>;
},
<span class="hljs-attr">icelandic</span>: <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">n</span>) </span>{ <span class="hljs-keyword">return</span> (n % <span class="hljs-number">10</span> !== <span class="hljs-number">1</span> || n % <span class="hljs-number">100</span> === <span class="hljs-number">11</span>) ? <span class="hljs-number">1</span> : <span class="hljs-number">0</span>; },
<span class="hljs-attr">slovenian</span>: <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">n</span>) </span>{
<span class="hljs-keyword">var</span> lastTwo = n % <span class="hljs-number">100</span>;
<span class="hljs-keyword">if</span> (lastTwo === <span class="hljs-number">1</span>) {
<span class="hljs-keyword">return</span> <span class="hljs-number">0</span>;
}
<span class="hljs-keyword">if</span> (lastTwo === <span class="hljs-number">2</span>) {
<span class="hljs-keyword">return</span> <span class="hljs-number">1</span>;
}
<span class="hljs-keyword">if</span> (lastTwo === <span class="hljs-number">3</span> || lastTwo === <span class="hljs-number">4</span>) {
<span class="hljs-keyword">return</span> <span class="hljs-number">2</span>;
}
<span class="hljs-keyword">return</span> <span class="hljs-number">3</span>;
}
};</pre></div></div>
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<p>Mapping from pluralization group to individual language codes/locales.
Will look up based on exact match, if not found and it’s a locale will parse the locale
for language code, and if that does not exist will default to ‘en’</p>
</div>
<div class="content"><div class='highlight'><pre>var pluralTypeToLanguages = {
arabic: ['ar'],
bosnian_serbian: ['bs-Latn-BA', 'bs-Cyrl-BA', 'srl-RS', 'sr-RS'],
chinese: ['id', 'id-ID', 'ja', 'ko', 'ko-KR', 'lo', 'ms', 'th', 'th-TH', 'zh'],
croatian: ['hr', 'hr-HR'],
german: ['fa', 'da', 'de', 'en', 'es', 'fi', 'el', 'he', 'hi-IN', 'hu', 'hu-HU', 'it', 'nl', 'no', 'pt', 'sv', 'tr'],
french: ['fr', 'tl', 'pt-br'],
russian: ['ru', 'ru-RU'],
lithuanian: ['lt'],
czech: ['cs', 'cs-CZ', 'sk'],
polish: ['pl'],
icelandic: ['is'],
slovenian: ['sl-SL']
};
function langToTypeMap(mapping) {
var ret = {};
forEach(mapping, function (langs, type) {
forEach(langs, function (lang) {
ret[lang] = type;
});
});
return ret;
}
function pluralTypeName(locale) {
var langToPluralType = langToTypeMap(pluralTypeToLanguages);
return langToPluralType[locale]
|| langToPluralType[split.call(locale, /-/, 1)[0]]
|| langToPluralType.en;
}
function pluralTypeIndex(locale, count) {
return pluralTypes[pluralTypeName(locale)](count);
}
function escape(token) {
return token.replace(/[.*+?^${}()|[\]\\]/g, '\\$&amp;');
}
function constructTokenRegex(opts) {
var prefix = (opts &amp;&amp; opts.prefix) || '%{';
var suffix = (opts &amp;&amp; opts.suffix) || '}';
if (prefix === delimiter || suffix === delimiter) {
throw new RangeError('"' + delimiter + '" token is reserved for pluralization');
}
return new RegExp(escape(prefix) + '(.*?)' + escape(suffix), 'g');
}
var dollarRegex = /\$/g;
var dollarBillsYall = '$$';
var defaultTokenRegex = /%\{(.*?)\}/g;</pre></div></div>
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<h3 id="transformphrase-phrase-substitutions-locale-">transformPhrase(phrase, substitutions, locale)</h3>
<p>Takes a phrase string and transforms it by choosing the correct
plural form and interpolating it.</p>
<pre><code>transformPhrase(<span class="hljs-string">'Hello, %{name}!'</span>, {<span class="hljs-attr">name</span>: <span class="hljs-string">'Spike'</span>});
<span class="hljs-comment">// "Hello, Spike!"</span>
</code></pre><p>The correct plural form is selected if substitutions.smart_count
is set. You can pass in a number instead of an Object as <code>substitutions</code>
as a shortcut for <code>smart_count</code>.</p>
<pre><code>transformPhrase(<span class="hljs-string">'%{smart_count} new messages |||| 1 new message'</span>, {<span class="hljs-attr">smart_count</span>: <span class="hljs-number">1</span>}, <span class="hljs-string">'en'</span>);
<span class="hljs-comment">// "1 new message"</span>
transformPhrase(<span class="hljs-string">'%{smart_count} new messages |||| 1 new message'</span>, {<span class="hljs-attr">smart_count</span>: <span class="hljs-number">2</span>}, <span class="hljs-string">'en'</span>);
<span class="hljs-comment">// "2 new messages"</span>
transformPhrase(<span class="hljs-string">'%{smart_count} new messages |||| 1 new message'</span>, <span class="hljs-number">5</span>, <span class="hljs-string">'en'</span>);
<span class="hljs-comment">// "5 new messages"</span>
</code></pre><p>You should pass in a third argument, the locale, to specify the correct plural type.
It defaults to <code>&#39;en&#39;</code> with 2 plural forms.</p>
</div>
<div class="content"><div class='highlight'><pre><span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">transformPhrase</span>(<span class="hljs-params">phrase, substitutions, locale, tokenRegex</span>) </span>{
<span class="hljs-keyword">if</span> (<span class="hljs-keyword">typeof</span> phrase !== <span class="hljs-string">'string'</span>) {
<span class="hljs-keyword">throw</span> <span class="hljs-keyword">new</span> <span class="hljs-built_in">TypeError</span>(<span class="hljs-string">'Polyglot.transformPhrase expects argument #1 to be string'</span>);
}
<span class="hljs-keyword">if</span> (substitutions == <span class="hljs-literal">null</span>) {
<span class="hljs-keyword">return</span> phrase;
}
<span class="hljs-keyword">var</span> result = phrase;
<span class="hljs-keyword">var</span> interpolationRegex = tokenRegex || defaultTokenRegex;</pre></div></div>
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<p>allow number as a pluralization shortcut</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">var</span> options = <span class="hljs-keyword">typeof</span> substitutions === <span class="hljs-string">'number'</span> ? { <span class="hljs-attr">smart_count</span>: substitutions } : substitutions;</pre></div></div>
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<p>Select plural form: based on a phrase text that contains <code>n</code>
plural forms separated by <code>delimiter</code>, a <code>locale</code>, and a <code>substitutions.smart_count</code>,
choose the correct plural form. This is only done if <code>count</code> is set.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">if</span> (options.smart_count != <span class="hljs-literal">null</span> &amp;&amp; result) {
<span class="hljs-keyword">var</span> texts = split.call(result, delimiter);
result = trim(texts[pluralTypeIndex(locale || <span class="hljs-string">'en'</span>, options.smart_count)] || texts[<span class="hljs-number">0</span>]);
}</pre></div></div>
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<p>Interpolate: Creates a <code>RegExp</code> object for each interpolation placeholder.</p>
</div>
<div class="content"><div class='highlight'><pre> result = replace.call(result, interpolationRegex, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">expression, argument</span>) </span>{
<span class="hljs-keyword">if</span> (!has(options, argument) || options[argument] == <span class="hljs-literal">null</span>) { <span class="hljs-keyword">return</span> expression; }</pre></div></div>
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<p>Ensure replacement value is escaped to prevent special $-prefixed regex replace tokens.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">return</span> replace.call(options[argument], dollarRegex, dollarBillsYall);
});
<span class="hljs-keyword">return</span> result;
}</pre></div></div>
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<h3 id="polyglot-class-constructor">Polyglot class constructor</h3>
</div>
<div class="content"><div class='highlight'><pre><span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">Polyglot</span>(<span class="hljs-params">options</span>) </span>{
<span class="hljs-keyword">var</span> opts = options || {};
<span class="hljs-keyword">this</span>.phrases = {};
<span class="hljs-keyword">this</span>.extend(opts.phrases || {});
<span class="hljs-keyword">this</span>.currentLocale = opts.locale || <span class="hljs-string">'en'</span>;
<span class="hljs-keyword">var</span> allowMissing = opts.allowMissing ? transformPhrase : <span class="hljs-literal">null</span>;
<span class="hljs-keyword">this</span>.onMissingKey = <span class="hljs-keyword">typeof</span> opts.onMissingKey === <span class="hljs-string">'function'</span> ? opts.onMissingKey : allowMissing;
<span class="hljs-keyword">this</span>.warn = opts.warn || warn;
<span class="hljs-keyword">this</span>.tokenRegex = constructTokenRegex(opts.interpolation);
}</pre></div></div>
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<h3 id="polyglot-locale-locale-">polyglot.locale([locale])</h3>
<p>Get or set locale. Internally, Polyglot only uses locale for pluralization.</p>
</div>
<div class="content"><div class='highlight'><pre>Polyglot.prototype.locale = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">newLocale</span>) </span>{
<span class="hljs-keyword">if</span> (newLocale) <span class="hljs-keyword">this</span>.currentLocale = newLocale;
<span class="hljs-keyword">return</span> <span class="hljs-keyword">this</span>.currentLocale;
};</pre></div></div>
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<h3 id="polyglot-extend-phrases-">polyglot.extend(phrases)</h3>
<p>Use <code>extend</code> to tell Polyglot how to translate a given key.</p>
<pre><code>polyglot.extend({
<span class="hljs-string">"hello"</span>: <span class="hljs-string">"Hello"</span>,
<span class="hljs-string">"hello_name"</span>: <span class="hljs-string">"Hello, %{name}"</span>
});
</code></pre><p>The key can be any string. Feel free to call <code>extend</code> multiple times;
it will override any phrases with the same key, but leave existing phrases
untouched.</p>
<p>It is also possible to pass nested phrase objects, which get flattened
into an object with the nested keys concatenated using dot notation.</p>
<pre><code>polyglot.extend({
<span class="hljs-string">"nav"</span>: {
<span class="hljs-string">"hello"</span>: <span class="hljs-string">"Hello"</span>,
<span class="hljs-string">"hello_name"</span>: <span class="hljs-string">"Hello, %{name}"</span>,
<span class="hljs-string">"sidebar"</span>: {
<span class="hljs-string">"welcome"</span>: <span class="hljs-string">"Welcome"</span>
}
}
});
<span class="hljs-built_in">console</span>.log(polyglot.phrases);
<span class="hljs-comment">// {</span>
<span class="hljs-comment">// 'nav.hello': 'Hello',</span>
<span class="hljs-comment">// 'nav.hello_name': 'Hello, %{name}',</span>
<span class="hljs-comment">// 'nav.sidebar.welcome': 'Welcome'</span>
<span class="hljs-comment">// }</span>
</code></pre><p><code>extend</code> accepts an optional second argument, <code>prefix</code>, which can be used
to prefix every key in the phrases object with some string, using dot
notation.</p>
<pre><code>polyglot.extend({
<span class="hljs-string">"hello"</span>: <span class="hljs-string">"Hello"</span>,
<span class="hljs-string">"hello_name"</span>: <span class="hljs-string">"Hello, %{name}"</span>
}, <span class="hljs-string">"nav"</span>);
<span class="hljs-built_in">console</span>.log(polyglot.phrases);
<span class="hljs-comment">// {</span>
<span class="hljs-comment">// 'nav.hello': 'Hello',</span>
<span class="hljs-comment">// 'nav.hello_name': 'Hello, %{name}'</span>
<span class="hljs-comment">// }</span>
</code></pre><p>This feature is used internally to support nested phrase objects.</p>
</div>
<div class="content"><div class='highlight'><pre>Polyglot.prototype.extend = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">morePhrases, prefix</span>) </span>{
forEach(morePhrases, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">phrase, key</span>) </span>{
<span class="hljs-keyword">var</span> prefixedKey = prefix ? prefix + <span class="hljs-string">'.'</span> + key : key;
<span class="hljs-keyword">if</span> (<span class="hljs-keyword">typeof</span> phrase === <span class="hljs-string">'object'</span>) {
<span class="hljs-keyword">this</span>.extend(phrase, prefixedKey);
} <span class="hljs-keyword">else</span> {
<span class="hljs-keyword">this</span>.phrases[prefixedKey] = phrase;
}
}, <span class="hljs-keyword">this</span>);
};</pre></div></div>
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<h3 id="polyglot-unset-phrases-">polyglot.unset(phrases)</h3>
<p>Use <code>unset</code> to selectively remove keys from a polyglot instance.</p>
<pre><code>polyglot.unset(<span class="hljs-string">"some_key"</span>);
polyglot.unset({
<span class="hljs-string">"hello"</span>: <span class="hljs-string">"Hello"</span>,
<span class="hljs-string">"hello_name"</span>: <span class="hljs-string">"Hello, %{name}"</span>
});
</code></pre><p>The unset method can take either a string (for the key), or an object hash with
the keys that you would like to unset.</p>
</div>
<div class="content"><div class='highlight'><pre>Polyglot.prototype.unset = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">morePhrases, prefix</span>) </span>{
<span class="hljs-keyword">if</span> (<span class="hljs-keyword">typeof</span> morePhrases === <span class="hljs-string">'string'</span>) {
<span class="hljs-keyword">delete</span> <span class="hljs-keyword">this</span>.phrases[morePhrases];
} <span class="hljs-keyword">else</span> {
forEach(morePhrases, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">phrase, key</span>) </span>{
<span class="hljs-keyword">var</span> prefixedKey = prefix ? prefix + <span class="hljs-string">'.'</span> + key : key;
<span class="hljs-keyword">if</span> (<span class="hljs-keyword">typeof</span> phrase === <span class="hljs-string">'object'</span>) {
<span class="hljs-keyword">this</span>.unset(phrase, prefixedKey);
} <span class="hljs-keyword">else</span> {
<span class="hljs-keyword">delete</span> <span class="hljs-keyword">this</span>.phrases[prefixedKey];
}
}, <span class="hljs-keyword">this</span>);
}
};</pre></div></div>
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<h3 id="polyglot-clear-">polyglot.clear()</h3>
<p>Clears all phrases. Useful for special cases, such as freeing
up memory if you have lots of phrases but no longer need to
perform any translation. Also used internally by <code>replace</code>.</p>
</div>
<div class="content"><div class='highlight'><pre>Polyglot.prototype.clear = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params"></span>) </span>{
<span class="hljs-keyword">this</span>.phrases = {};
};</pre></div></div>
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<h3 id="polyglot-replace-phrases-">polyglot.replace(phrases)</h3>
<p>Completely replace the existing phrases with a new set of phrases.
Normally, just use <code>extend</code> to add more phrases, but under certain
circumstances, you may want to make sure no old phrases are lying around.</p>
</div>
<div class="content"><div class='highlight'><pre>Polyglot.prototype.replace = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">newPhrases</span>) </span>{
<span class="hljs-keyword">this</span>.clear();
<span class="hljs-keyword">this</span>.extend(newPhrases);
};</pre></div></div>
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<h3 id="polyglot-t-key-options-">polyglot.t(key, options)</h3>
<p>The most-used method. Provide a key, and <code>t</code> will return the
phrase.</p>
<pre><code>polyglot.t(<span class="hljs-string">"hello"</span>);
=&gt; <span class="hljs-string">"Hello"</span>
</code></pre><p>The phrase value is provided first by a call to <code>polyglot.extend()</code> or
<code>polyglot.replace()</code>.</p>
<p>Pass in an object as the second argument to perform interpolation.</p>
<pre><code>polyglot.t(<span class="hljs-string">"hello_name"</span>, {<span class="hljs-attr">name</span>: <span class="hljs-string">"Spike"</span>});
=&gt; <span class="hljs-string">"Hello, Spike"</span>
</code></pre><p>If you like, you can provide a default value in case the phrase is missing.
Use the special option key “_” to specify a default.</p>
<pre><code>polyglot.t(<span class="hljs-string">"i_like_to_write_in_language"</span>, {
<span class="hljs-attr">_</span>: <span class="hljs-string">"I like to write in %{language}."</span>,
<span class="hljs-attr">language</span>: <span class="hljs-string">"JavaScript"</span>
});
=&gt; <span class="hljs-string">"I like to write in JavaScript."</span>
</code></pre>
</div>
<div class="content"><div class='highlight'><pre>Polyglot.prototype.t = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">key, options</span>) </span>{
<span class="hljs-keyword">var</span> phrase, result;
<span class="hljs-keyword">var</span> opts = options == <span class="hljs-literal">null</span> ? {} : options;
<span class="hljs-keyword">if</span> (<span class="hljs-keyword">typeof</span> <span class="hljs-keyword">this</span>.phrases[key] === <span class="hljs-string">'string'</span>) {
phrase = <span class="hljs-keyword">this</span>.phrases[key];
} <span class="hljs-keyword">else</span> <span class="hljs-keyword">if</span> (<span class="hljs-keyword">typeof</span> opts._ === <span class="hljs-string">'string'</span>) {
phrase = opts._;
} <span class="hljs-keyword">else</span> <span class="hljs-keyword">if</span> (<span class="hljs-keyword">this</span>.onMissingKey) {
<span class="hljs-keyword">var</span> onMissingKey = <span class="hljs-keyword">this</span>.onMissingKey;
result = onMissingKey(key, opts, <span class="hljs-keyword">this</span>.currentLocale, <span class="hljs-keyword">this</span>.tokenRegex);
} <span class="hljs-keyword">else</span> {
<span class="hljs-keyword">this</span>.warn(<span class="hljs-string">'Missing translation for key: "'</span> + key + <span class="hljs-string">'"'</span>);
result = key;
}
<span class="hljs-keyword">if</span> (<span class="hljs-keyword">typeof</span> phrase === <span class="hljs-string">'string'</span>) {
result = transformPhrase(phrase, opts, <span class="hljs-keyword">this</span>.currentLocale, <span class="hljs-keyword">this</span>.tokenRegex);
}
<span class="hljs-keyword">return</span> result;
};</pre></div></div>
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<h3 id="polyglot-has-key-">polyglot.has(key)</h3>
<p>Check if polyglot has a translation for given key</p>
</div>
<div class="content"><div class='highlight'><pre>Polyglot.prototype.has = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">key</span>) </span>{
<span class="hljs-keyword">return</span> has(<span class="hljs-keyword">this</span>.phrases, key);
};</pre></div></div>
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<p>export transformPhrase</p>
</div>
<div class="content"><div class='highlight'><pre>Polyglot.transformPhrase = <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">transform</span>(<span class="hljs-params">phrase, substitutions, locale</span>) </span>{
<span class="hljs-keyword">return</span> transformPhrase(phrase, substitutions, locale);
};
<span class="hljs-built_in">module</span>.exports = Polyglot;</pre></div></div>
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