I recommend the React documentation if you are curious how it works http://facebook.github.io/react/docs/reconciliation.html.
David On Wed, Apr 23, 2014 at 2:27 PM, Nahuel Greco <[email protected]> wrote: > So all component instances are created on the first render and then React > stores them internally? What happens if you redefine a component function > making it returning a different set of components, how Om/React knows the > function must be run again so the new components are instantiated and > replaces the old ones? You need to trigger a full render/reinstancing > manually after redefinitions like that? How? > > > > Saludos, > Nahuel Greco. > > > On Wed, Apr 23, 2014 at 11:14 AM, David Nolen <[email protected]>wrote: > >> On Wed, Apr 23, 2014 at 3:34 AM, Nahuel Greco <[email protected]> wrote: >> >>> Analyzing Om source, I see the following code path executed everytime >>> you change the application state: >>> >>> 1- om/render-all is called as a callback for requestAnimationFrame >>> 2- dom/render is called for each root binding >>> 3- om/build is called for the component function of the root binding, >>> component is instantiated and wrapped in a om/Pure class. Child components >>> are NOT instantiated because the render/render-state function is not yet >>> called. >>> 4- React.renderComponent is called for the newly instantiated root >>> component >>> 5- React.renderComponent calls the shouldComponentUpdate from the Pure >>> class. >>> 6- shouldComponentUpdate (for example) returns false as the component >>> doesn't needs to be updated because the data pointed by his cursor didn't >>> changed >>> 7- because no update is needed, React.renderComponent never calls >>> render/render-state, so the children components (if any) are never >>> instantiated >>> >>> So my question is: How React knows if there are *children* components >>> needing updating, if they are never instantiated when his parent (owner?) >>> returns false to shouldComponentUpdate? >>> >> >> Everything gets instantiated during the first render. >> >> David >> >> -- >> Note that posts from new members are moderated - please be patient with >> your first post. >> --- >> You received this message because you are subscribed to the Google Groups >> "ClojureScript" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To post to this group, send email to [email protected]. >> Visit this group at http://groups.google.com/group/clojurescript. >> > > -- > Note that posts from new members are moderated - please be patient with > your first post. > --- > You received this message because you are subscribed to the Google Groups > "ClojureScript" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/clojurescript. > -- Note that posts from new members are moderated - please be patient with your first post. --- You received this message because you are subscribed to the Google Groups "ClojureScript" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/clojurescript.
