Nils Lande: Hello Post 7

My previous post had a static class. Lets see if we can use that class in this post.
The button below has 2 different behaviours:

If my previous post (referred to as 'Post7') is visible the Post7.sayHello() function will be called and the message counter will be updated.
If only this post is shown, then an alert message is shown and no message counter is incremented(since it does not exist).

The code: <head> <script type="text/javascript"> // Constructor function. The object is called 'Post8' to make it unique // on my blog (when all posts are shown). function Post8(){}; // Static method. // If the static calss from the previous post is defined, // we call the sayHello() method on it. If not, we show an // alert. Post8.sayHelloToPost7 = function(helloText) { console.log("sayHelloToPost7 ()"); // Have to use the typeof here to not get 'Undefined' exception. if(typeof Post7 === 'undefined') { window.alert('Post7 is not here...'); }else{ Post7.sayHello(helloText); } }; </script> </head> <body> <p>Text omitted. </p> <p><button onclick="Post8.sayHelloToPost7('Hello from Post8')">Hello Post7!</button></p>

Nils Lande

Tuesday, July 8, 2014

Hello Post 7

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