{"id":1571,"date":"2024-08-02T07:26:07","date_gmt":"2024-08-02T05:26:07","guid":{"rendered":"https:\/\/blog.sutilweb.eu\/?page_id=1571"},"modified":"2024-08-02T07:26:07","modified_gmt":"2024-08-02T05:26:07","slug":"004-ajax-api-fetch-async-await","status":"publish","type":"page","link":"https:\/\/sutilweb.eu\/index.php\/lenguajes\/javascript\/javascript-practico\/15-ajax\/004-ajax-api-fetch-async-await\/","title":{"rendered":"004. AJAX: API Fetch + Async-Await"},"content":{"rendered":"\n<p>En este cap\u00edtulo hacemos el mismo ejercicio que en el cap\u00edtulo anterior pero con las <strong>funciones as\u00edncronas<\/strong>, veamos la sintaxis de los dos archivos que hemos de crear, <em>peticionesasincronas.html<\/em> y <em>peticionesasincronas.js<\/em>.<\/p>\n\n\n\n<!--more-->\n\n\n\n<p>Sintaxis de <em>peticionesasincronas.html<\/em>.<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">&lt;!DOCTYPE html&gt;\n&lt;html lang=\"en\"&gt;\n&nbsp; &lt;head&gt;\n&nbsp; &nbsp; &lt;meta charset=\"UTF-8\" \/&gt;\n&nbsp; &nbsp; &lt;meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\" \/&gt;\n&nbsp; &nbsp; &lt;title&gt;Peticiones as\u00edncronas&lt;\/title&gt;\n&nbsp; &lt;\/head&gt;\n&nbsp; &lt;body&gt;\n&nbsp; &nbsp; &lt;h1&gt;Ajax&lt;\/h1&gt;\n&nbsp; &nbsp; &lt;h2&gt;Peticiones as\u00edncronas&lt;\/h2&gt;\n&nbsp; &nbsp; &lt;ol id=\"fetch-async\"&gt;&lt;\/ol&gt;\n&nbsp; &nbsp; &lt;script src=\".\/03peticionesasincronas.js\"&gt;&lt;\/script&gt;\n&nbsp; &lt;\/body&gt;\n&lt;\/html&gt;<\/pre>\n\n\n\n<p>Sintaxis de <em>peticionesasincronas.js<\/em>.<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">(() =&gt; {\n&nbsp; const $fetchAsync = document.getElementById(\"fetch-async\"),\n&nbsp; &nbsp; $fragment = document.createDocumentFragment();\n\n&nbsp; async function getData() {\n&nbsp; &nbsp; try {\n&nbsp; &nbsp; &nbsp; let res = await fetch(\"https:\/\/jsonplaceholder.typicode.com\/user\"),\n&nbsp; &nbsp; &nbsp; &nbsp; json = await res.json();\n  &nbsp; &nbsp; if (!res.ok)\n&nbsp; &nbsp; &nbsp; &nbsp; throw {\n&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; status: res.status,\n&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; statusText: res.statusText,\n&nbsp; &nbsp; &nbsp; &nbsp; };\n&nbsp; &nbsp; &nbsp; json.forEach((el) =&gt; {\n&nbsp; &nbsp; &nbsp; &nbsp; const $li = document.createElement(\"li\");\n&nbsp; &nbsp; &nbsp; &nbsp; $li.innerHTML = `${el.name} -- ${el.email} -- ${el.phone}`;\n&nbsp; &nbsp; &nbsp; &nbsp; $fragment.appendChild($li);\n&nbsp; &nbsp; &nbsp; });\n&nbsp; &nbsp; &nbsp; $fetchAsync.appendChild($fragment);\n&nbsp; &nbsp; } catch (err) {\n&nbsp; &nbsp; &nbsp; let message = err.statusText || \"Ocurri\u00f3 un error\";\n&nbsp; &nbsp; &nbsp; $fetchAsync.innerHTML = `Error ${err.status}: ${message}`;\n&nbsp; &nbsp; } finally {\n&nbsp; &nbsp; &nbsp; console.log(\n&nbsp; &nbsp; &nbsp; &nbsp; \"Lo que est\u00e1 en finally se ejecuta independientemente del try catch\"\n&nbsp; &nbsp; &nbsp; );\n&nbsp; &nbsp; }\n&nbsp; }\n&nbsp; getData();\n})();<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>En este cap\u00edtulo hacemos el mismo ejercicio que en el cap\u00edtulo anterior pero con las funciones as\u00edncronas, veamos la sintaxis [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1561,"menu_order":3,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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