The role of navigation thus falls to a router, whichĪssists in managing application state (e.g., allowing users toīookmark a particular view they have navigated to). In a new view within the same page without any such refresh being In single-page JavaScript applications, however, once data isįetched from a server via Ajax, it can simply be dynamically rendered Navigating between independent views required the use of a page It is also worth noting that in classical web development, Part or even all of a view object so that it can be generated from the Template might be a declarative way to specify Observes a model and keeps the visual representation up to date. Developers comingįrom a Struts Model 2 architecture may feel like a template Note that templates are not themselves views. Implemented using the popular Handlebars.js framework and another Here, we can see two examples of HTML templates (Examples 10-1 and 10-2). On an as-needed basis when it comes to building larger Number of benefits, particularly when opting to store templatesĮxternally, as this can give way to templates being dynamically loaded Population is taken care of by the framework itself. extend (), and frameworks are typically smartĮnough to accept data in a JSON form (which model instances can beĬonverted to), such that we only need be concerned with maintainingĬlean models and clean templates. Below, we can see an example of a very simplistic model Would be stored in an instance of a model, and a model may also be Such a model may contain related attributes suchĪs a caption, image source, and additional metadata. Would merit its own model, as it represents a unique kind ofĭomain-specific data. In a photo gallery, the concept of a photo To understand models further, let us imagine we have a JavaScript Notify its observers (e.g., views, a concept we will cover shortly) thatĪ change has occurred so that they may react accordingly. When a model changes (e.g., when it is updated), it will typically Instead represent unique forms of data that an application may require. They areĬoncerned with neither the user-interface nor presentation layers but Models manage the data for an application.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |