{"id":579,"date":"2012-03-11T20:06:27","date_gmt":"2012-03-11T18:06:27","guid":{"rendered":"http:\/\/hasselba.ch\/blog\/?p=579"},"modified":"2012-03-11T20:06:27","modified_gmt":"2012-03-11T18:06:27","slug":"quick-n-dirty-ssjs-code-vor-beforpageload-ausfuhren","status":"publish","type":"post","link":"https:\/\/hasselba.ch\/blog\/?p=579","title":{"rendered":"Quick-n-Dirty: SSJS Code vor BeforPageLoad ausf\u00fchren"},"content":{"rendered":"<p>Um SSJS Code vor dem &#8222;<em>BeforePageLoad<\/em>&#8222;-Event auszuf\u00fchren, kann der Code einfach in eine <em>DataContext<\/em>-Variable gepackt werden. Die Berechnung der <em>DataContext<\/em>-Variable sollte auf &#8222;<em>ComputeOnPageLoad<\/em>&#8220; gesetzt sein, dann wird der Code auch nur einmal ausgef\u00fchrt. Als R\u00fcckgabewert sollte <em>null<\/em> verwendet werden, dann verschwindet Sie aus dem Speicher und die Variable ist auch nicht via SSJS referenzierbar.<\/p>\n<p>Nat\u00fcrlich bleiben die im SSJS-Code definierten Variablen Ereignis\u00fcbergreifend erhalten. Hier ein Beispiel, indem die Variable testVar vor dem &#8222;<em>BeforePageLoad<\/em>&#8222;-Event bef\u00fcllt und w\u00e4hrend des Events ausgewertet wird:<\/p>\n<pre>&lt;?xml version=\"1.0\" encoding=\"UTF-8\"?&gt;\r\n&lt;xp:view xmlns:xp=\"http:\/\/www.ibm.com\/xsp\/core\"&gt;\r\n\r\n\u00a0\u00a0 &lt;xp:this.beforePageLoad&gt;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 &lt;![CDATA[#{javascript:\r\n         print(\"Before PageLoad: \" + testVar )}]]&gt;\r\n\u00a0\u00a0 &lt;\/xp:this.beforePageLoad&gt;\r\n\r\n\u00a0\u00a0 &lt;xp:this.dataContexts&gt;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 &lt;xp:dataContext var=\"dummy\"&gt;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0 &lt;xp:this.value&gt;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 &lt;![CDATA[${javascript:print(\"Data Context!\");\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 testVar = \"Data Context!\"\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 return null}]]&gt;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 &lt;\/xp:this.value&gt;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 &lt;\/xp:dataContext&gt;\r\n\u00a0\u00a0 &lt;\/xp:this.dataContexts&gt;\r\n\u00a0 \u00a0\r\n&lt;\/xp:view&gt;<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Um SSJS Code vor dem &#8222;BeforePageLoad&#8222;-Event auszuf\u00fchren, kann der Code einfach in eine DataContext-Variable gepackt werden. Die Berechnung der DataContext-Variable sollte auf &#8222;ComputeOnPageLoad&#8220; gesetzt sein, dann wird der Code auch nur einmal ausgef\u00fchrt. Als R\u00fcckgabewert sollte null verwendet werden, dann &hellip; <a href=\"https:\/\/hasselba.ch\/blog\/?p=579\">Weiterlesen <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,9,76,74],"tags":[7,4,5,32,3],"class_list":["post-579","post","type-post","status-publish","format-standard","hentry","category-allgemein","category-javascript","category-ssjs","category-xpages","tag-domino","tag-js","tag-ssjs","tag-tipp","tag-xpages"],"_links":{"self":[{"href":"https:\/\/hasselba.ch\/blog\/index.php?rest_route=\/wp\/v2\/posts\/579","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hasselba.ch\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hasselba.ch\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hasselba.ch\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hasselba.ch\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=579"}],"version-history":[{"count":3,"href":"https:\/\/hasselba.ch\/blog\/index.php?rest_route=\/wp\/v2\/posts\/579\/revisions"}],"predecessor-version":[{"id":583,"href":"https:\/\/hasselba.ch\/blog\/index.php?rest_route=\/wp\/v2\/posts\/579\/revisions\/583"}],"wp:attachment":[{"href":"https:\/\/hasselba.ch\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=579"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hasselba.ch\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=579"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hasselba.ch\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=579"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}