angular 2 lazy loading

return false; } var box = Element.getboundingclientrect (); Calculates whether a four-sided distance satisfies the condition return (box.right >= view.l box.bottom >= view.t box.left 　　2. Have the judgment function loaded, then how to do the lazy loading of the picture?first load the loadding daisy picture, when the

First, let's take a look at the diagram below, explaining a request flow for a Web application!Description of lazy Load exception:Lazy loading is when we query an object, all of its properties are to be detected!If lazy loading is turned on, the session is closed on the service layer, and if our view does not need his

will not be executed immediately, and then the first time you need to execute.For more explanations in this section, please see the related links in Controljs in resources at the end.Tips:1. simulate a longer download time :Write a back-end script to sleep for a certain amount of time. such as in the JSP Thread.Sleep (5000); To receive the content after 5 seconds.2. Simulation of long JS Code execution time (because this step is generally relativel

When we open a page, the browser reads the address from the tag src in the page and starts the thread to load.If the user's speed is not power or the picture on this page too much, it will occur each picture is loaded a little but not loaded, resulting in no picture can be displayed normally. On the one hand, so that the user's experience is very poor, who will be patiently waiting for the page to load? On the other hand, loading each picture sends a

I. Definition Picture delay loading is also known as lazy loading, loading some pictures when the picture is delayed or meets certain conditions, and is usually used for pages with more pictures. You can reduce the number of requests or delay requests to optimize performance. Ii. form of presentation "1" delay

One, native JavaScript pictures lazy loading1. How to use, e.g.// picture address to bind 2. Introduce the following native JavaScript code in the pagevarLazy = { "IMG":NULL, "GetY":function(b) {varA = 0; if(b b.offsetparent) while(b.offsetparent) A + = B.offsettop, B = b.offsetparent;Elseb B.y (A + =b.y); returnA; }, "GetX":function(b) {varA = 0; if(b b.offsetparent) while(b.offsetparent) A +

()); Session1.gettransaction (). commit (); Session1.close (); }4.get and loadGet: Load in a timely manner, just call the Get method to query the database immediatelyLoad: Lazy loading by default, queries to the database when data is used5. Lazy LoadingWhen the data is used to query the database, this is Hibernate