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| author | Florian Merz <me@fiji-flo.de> | 2021-02-11 14:46:50 +0100 |
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| committer | Florian Merz <me@fiji-flo.de> | 2021-02-11 14:46:50 +0100 |
| commit | a55b575e8089ee6cab7c5c262a7e6db55d0e34d6 (patch) | |
| tree | 5032e6779a402a863654c9d65965073f09ea4182 /files/es/web/javascript/reference/global_objects/generator/throw | |
| parent | 8260a606c143e6b55a467edf017a56bdcd6cba7e (diff) | |
| download | translated-content-a55b575e8089ee6cab7c5c262a7e6db55d0e34d6.tar.gz translated-content-a55b575e8089ee6cab7c5c262a7e6db55d0e34d6.tar.bz2 translated-content-a55b575e8089ee6cab7c5c262a7e6db55d0e34d6.zip | |
unslug es: move
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| -rw-r--r-- | files/es/web/javascript/reference/global_objects/generator/throw/index.html | 94 |
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diff --git a/files/es/web/javascript/reference/global_objects/generator/throw/index.html b/files/es/web/javascript/reference/global_objects/generator/throw/index.html new file mode 100644 index 0000000000..9f4cd76fbe --- /dev/null +++ b/files/es/web/javascript/reference/global_objects/generator/throw/index.html @@ -0,0 +1,94 @@ +--- +title: Generator.prototype.throw() +slug: Web/JavaScript/Referencia/Objetos_globales/Generador/throw +translation_of: Web/JavaScript/Reference/Global_Objects/Generator/throw +--- +<div>{{JSRef}}</div> + +<p>El método <code><strong>throw()</strong></code> reanuda la ejecución de un generador al lanzar un error en éste y regresar un objeto con las dos propiedades <code>done</code> y <code>value</code>.</p> + +<h2 id="Sintaxis">Sintaxis</h2> + +<pre class="syntaxbox"><code><var>gen</var>.throw(excepción)</code></pre> + +<h3 id="Parámetros">Parámetros</h3> + +<dl> + <dt><code>excepción</code></dt> + <dd>La excepción a lanzar. Al hacer depuración, es útil que la excepción cumpla con <code>instanceof</code> {{jsxref("Error")}}.</dd> +</dl> + +<h3 id="Valor_de_retorno">Valor de retorno</h3> + +<p>Un {{jsxref("Object")}} con dos propiedades:</p> + +<ul> + <li><code>done</code> (booleano) + + <ul> + <li>Es <code>verdadero</code> si el iterador ya llegó al final de la secuencia. En este caso <code>valor</code> define opcionalmente el <em>valor de retorno</em> del iterador.</li> + <li>Es <code>falso</code> si el iterador puede dar un siguiente valor en la secuencia. Es equivalente a no definir la propiedad <code>done</code>.</li> + </ul> + </li> + <li><code>value</code> - cualquier valor Javascript regresado por el iterador. Éste puede ser omitido si <code>done</code> is <code>verdadero</code>.</li> +</ul> + +<h2 id="Examples">Examples</h2> + +<h3 id="Using_throw()">Using <code>throw()</code></h3> + +<p>The following example shows a simple generator and an error that is thrown using the <code>throw</code> method. An error can be caught by a <code><a href="/en-US/docs/Web/JavaScript/Reference/Statements/try...catch">try...catch</a></code> block as usual.</p> + +<pre class="brush: js">function* gen() { + while(true) { + try { + yield 42; + } catch(e) { + console.log('Error caught!'); + } + } +} + +var g = gen(); +g.next(); +// { value: 42, done: false } +g.throw(new Error('Something went wrong')); +// "Error caught!" +// { value: 42, done: false } +</pre> + +<h2 id="Specifications">Specifications</h2> + +<table class="standard-table"> + <tbody> + <tr> + <th scope="col">Specification</th> + <th scope="col">Status</th> + <th scope="col">Comment</th> + </tr> + <tr> + <td>{{SpecName('ES2015', '#sec-generator.prototype.throw', 'Generator.prototype.throw')}}</td> + <td>{{Spec2('ES2015')}}</td> + <td>Initial definition.</td> + </tr> + <tr> + <td>{{SpecName('ESDraft', '#sec-generator.prototype.throw', 'Generator.prototype.throw')}}</td> + <td>{{Spec2('ESDraft')}}</td> + <td> </td> + </tr> + </tbody> +</table> + +<h2 id="Browser_compatibility">Browser compatibility</h2> + +<div> + + +<p>{{Compat("javascript.builtins.Generator.throw")}}</p> +</div> + +<h2 id="See_also">See also</h2> + +<ul> + <li><code><a href="/en-US/docs/Web/JavaScript/Reference/Statements/function*">function*</a></code></li> +</ul> |
