{"id":1417,"date":"2021-02-12T14:47:01","date_gmt":"2021-02-12T13:47:01","guid":{"rendered":"https:\/\/ekiwi.de\/?p=1417"},"modified":"2023-10-22T16:52:13","modified_gmt":"2023-10-22T14:52:13","slug":"bild-und-andere-html-elemente-zoomen","status":"publish","type":"post","link":"https:\/\/ekiwi.de\/index.php\/1417\/bild-und-andere-html-elemente-zoomen\/","title":{"rendered":"Bild und andere HTML-Elemente zoomen"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Inhalt<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/ekiwi.de\/index.php\/1417\/bild-und-andere-html-elemente-zoomen\/#Java-Script_Code_zum_Zoomen_von_Elementen\" >Java-Script Code zum Zoomen von Elementen<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/ekiwi.de\/index.php\/1417\/bild-und-andere-html-elemente-zoomen\/#Das_Bild\" >Das Bild<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/ekiwi.de\/index.php\/1417\/bild-und-andere-html-elemente-zoomen\/#Zoom-Buttons\" >Zoom-Buttons<\/a><\/li><\/ul><\/nav><\/div>\n<p>Ein Bild in mit HTML und JavaScript zoomen.<\/p>\n<p><!--more--><\/p>\n<p>Ein Bild auf Knopfdruck vergr\u00f6\u00dfern und verkleinern, geht genauso wie <a href=\"https:\/\/www.adobe.com\/de\/express\/feature\/image\/mirror\" target=\"_blank\" rel=\"noopener\">Bild spiegeln<\/a> und andere Grafikbearbeitungen, mit etwas JavaScript Code.<img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1418 aligncenter\" src=\"\/wp-content\/uploads\/2021\/02\/zoom_animation.gif\" alt=\"\" width=\"350\" height=\"246\" \/><\/p>\n<p><iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/TR9kWpC62Ko\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Java-Script_Code_zum_Zoomen_von_Elementen\"><\/span>Java-Script Code zum Zoomen von Elementen<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>F\u00fcr die Zoom-Funktion verwenden wir folgende Funktion:<\/p>\n<pre>&lt;script type=\"text\/javascript\"&gt;\r\n    function zoom (d, id)\r\n    {\r\n        element = document.getElementById(id);\r\n        if (d == 0)\r\n        {\r\n            nw = element.width*0.9;\r\n            nh = element.height*0.9;\r\n        }\r\n        else\r\n        {\r\n            nw = element.width*1.1;\r\n            nh = element.height*1.1;\r\n        }\r\n        element.width = nw;\r\n        element.height = nh;\r\n    }\r\n&lt;\/script&gt;<\/pre>\n<p>Diese hat zwei Parameter. Die erste gibt an, ob wir vergr\u00f6\u00dfern oder verkleinern wollen. 0 zoom hinaus, 1 oder ein anderer Wert zoomt hinein. Der zweite Parameter ist die ID von unserem HTML-Element.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Das_Bild\"><\/span>Das Bild<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>F\u00fcgen wir nun das Bild ein:<\/p>\n<pre>&lt;img id=\"zoomi\" src=\"logo.png\" width=\"300\" height=\"97\" \/&gt;<\/pre>\n<p>Unser Bild erh\u00e4lt eine ID, \u00fcber diese k\u00f6nnen wir es anschlie\u00dfend an die Funktion \u00fcbergeben,<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Zoom-Buttons\"><\/span>Zoom-Buttons<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Jetzt noch die Buttons f\u00fcr den Zoom:<\/p>\n<pre>&lt;button type=\"button\" onclick=\"zoom(1, 'zoomi')\"&gt;+&lt;\/button&gt;\r\n&lt;button type=\"button\" onclick=\"zoom(0, 'zoomi')\"&gt;-&lt;\/button&gt;\r\n<\/pre>\n<p>Hier sehen wir auch den Aufruf der Funktion. Einmal &#8222;1&#8220; f\u00fcr das vergr\u00f6\u00dfern und einmal &#8222;0&#8220; f\u00fcr das verkleinern, au\u00dferdem \u00fcbergeben wir die ID unseres Bildes.<\/p>\n<p>Fertig. Das Bild kann anschlie\u00dfend \u00fcber die Buttons gezoomt werden.<\/p>\n<p><a href=\"https:\/\/ekiwi.de\/tryit\/?id=144\" target=\"_blank\" rel=\"noopener\">Das vollst\u00e4ndige Beispiel zum Testen finden Sie hier<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>Ein Bild in mit HTML und JavaScript zoomen.<\/p>\n","protected":false},"author":1,"featured_media":61,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[15],"tags":[44,172],"class_list":["post-1417","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-javascript","tag-javascript","tag-tutorial"],"_links":{"self":[{"href":"https:\/\/ekiwi.de\/index.php\/wp-json\/wp\/v2\/posts\/1417","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ekiwi.de\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ekiwi.de\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ekiwi.de\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ekiwi.de\/index.php\/wp-json\/wp\/v2\/comments?post=1417"}],"version-history":[{"count":0,"href":"https:\/\/ekiwi.de\/index.php\/wp-json\/wp\/v2\/posts\/1417\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ekiwi.de\/index.php\/wp-json\/wp\/v2\/media\/61"}],"wp:attachment":[{"href":"https:\/\/ekiwi.de\/index.php\/wp-json\/wp\/v2\/media?parent=1417"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ekiwi.de\/index.php\/wp-json\/wp\/v2\/categories?post=1417"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ekiwi.de\/index.php\/wp-json\/wp\/v2\/tags?post=1417"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}