hongkongzuloo.blogg.se - Parameters in componet installbuilder

PARAMETERS IN COMPONET INSTALLBUILDER HOW TO
PARAMETERS IN COMPONET INSTALLBUILDER CODE

The component is torn down, and the viewmodel is disposed

PARAMETERS IN COMPONET INSTALLBUILDER CODE

This is how it can communicate cleanly with its parent, without tightly coupling the component code to any parent that uses it. If any of the parameters passed to the component is observable, then the component can of course observe any changes, or even write back modified values. Now the component is operating, and can remain on-screen for as long as needed. Or, if the component has no viewmodel, then the view is bound to any params you’ve supplied to the component binding. This phase always completes synchronously (constructors and factory functions are not allowed to be asynchronous), since it occurs every time a component is instantiated and performance would be unacceptable if it involved waiting for network requests. If the viewmodel is given as a createViewModel factory function, Knockout calls createViewModel(params, componentInfo), where componentInfo.element is the element into which the not-yet-bound template has already been injected. If the viewmodel is given as a constructor function, this means Knockout calls new YourViewModel(params). If the component has a viewmodel, it is instantiated The component template is cloned and injected into the container elementĪny existing content is removed and discarded.

PARAMETERS IN COMPONET INSTALLBUILDER HOW TO

For more about this, and how to allow synchronous loading, see Controlling synchronous/asynchronous loading. For API consistency, Knockout by default ensures that the loading process completes as an asynchronous callback even if the component is already loaded and cached in memory. Normally, this is an asynchronous process. If applicable, this is the phase where it requests any specified AMD modules from your AMD loader.

The default component loader supplies viewmodels/templates based on what you have registered.

This process only takes place once per component type, since Knockout caches the resulting definitions in memory.

Multiple component loaders may be consulted, until the first one recognises the component name and supplies a viewmodel/template.

Your component loaders are asked to supply the viewmodel factory and template When a component binding injects a component, Note that whenever a component is removed (either because the name observable changed, or because an enclosing control-flow binding removed the entire element), the removed component is disposed Component lifecycle

Usage with AMD using RequireJs (Asynchronous Module Definition).

Overview: What components and custom elements offer.

Preprocessing: Extending the binding syntax.

How KO works and what benefits it brings.

Its purpose is the same as the property inside the tag, but allows you set a different image for each parameter page. : When using custom inside the tag in your project file, it displays a custom PNG or GIF image at the left side of the installer page associated with this parameter. If it is set to 0, the page not only won’t be displayed but also the associated command line option won’t appear in the help menu.

: Whether or not to show the page to the end user (it can still be set through the command line interface). If none is provided, it will default to the value of the field. : Command line option associated with the parameter. If none is specified, the field will be used instead. : Title that will be displayed for the corresponding installer page. : Default value, in case one is not specified by the user. This will be used to create the corresponding installer variable and command line option.īecause of that, it may only contain alphanumeric characters.