Thanks, it's clearer now.
In fact, it's a stupid error that led me to wonder about $tw.
While testing about it in my module, I tried
console.log("__INIT: $tw="+$tw );
and I had an error, and assumed wrongly I could not "see" $tw. But the
error was simply that $tw could not be cast into a string (as asked by the '
+'). If I write
console.log("__INIT: $tw=",$tw );
it works....So I got confused, for no real reason. All my fault !!! Alain On Tue, Mar 22, 2016 at 9:32 PM, BJ <[email protected]> wrote: > It depends on what you plugin does. In each tiddler you need to put what > type of module the javascript is so that tiddlywiki can load it at the > correct time - generally try and copy what others have done. > > $tw is alway visible - it is a global variable. > > If you have a particular functionality then I may be able to be more > specific, you can experiment and see what works. > > > > On Tuesday, March 22, 2016 at 6:22:32 PM UTC, Alain Dutech wrote: >> >> Thanks BJ. >> >> I have looked a bit at boot.js and various startup modules. It is a bit >> more clear (especially how $tw is created and populated, but not perfrect. >> Still, I cannot say when the $tw can be used. >> >> Specifically, if a create a new module with the classical >> `(function(){ ... ` >> >> I will not be able to use `$tw.utils`. What should I do to "see" $tw ? >> If I call my module from a Widget, I could pass my module the $tw >> variable ? Other ways ? >> >> And, to go back to filter.js >> For example, $tw is used inside the fonction >> exports.compileFilter = function(filterString) { >> >> Is it because filters.js is loaded through $tw.modules.applyMethods() >> that $tw is in its scope ? >> >> Alain >> >> >> >> On Sun, Mar 20, 2016 at 8:22 PM, BJ <[email protected]> wrote: >> >>> HI Alain, >>> the modular structure of tiddlywiki is more extensive that 'require'. >>> >>> There is some documentation here >>> >>> tiddlywiki.com/dev. <http://tiddlywiki.com/dev> >>> >>> but mostly you can read the code! but ask questions when you get stuck. >>> >>> The $tw structure is populated in a number of step during the start up. >>> It is defined at the begin of the boot and some basic functionality is >>> added to it in boot.js. Alot of extra stuff in added to it in >>> >>> $:/core/modules/startup/load-modules.js >>> >>> javascipt modules in tiddlywiki can have a module-type that allow them >>> to be add to $tw thru $tw.modules.applyMethods(). (including the filter >>> functions) >>> >>> Some places use 'this' instead of $tw, may be for some future expansion >>> of tw? >>> >>> all the best >>> >>> BJ >>> >>> >>> On Sunday, March 20, 2016 at 5:16:22 PM UTC, Alain Dutech wrote: >>>> >>>> >>>> Hi, >>>> this must be a bunch of stupid questions but I'm still learning the >>>> logic of javascript. >>>> >>>> 1) when is the global $tw variable available? >>>> - what "module" are required for it to be available ? >>>> - does it become available after >>>> `require("$:/core/modules/widgets/widget.js");` ? Why ? >>>> - how come $tw can be used in the filter.js module ? as show below >>>> >>>> exports.getFilterOperators = function() { >>>> if(!this.filterOperators) { >>>> $tw.Wiki.prototype.filterOperators = {}; >>>> $tw.modules.applyMethods("filteroperator",this.filterOperators >>>> ); >>>> } >>>> return this.filterOperators; >>>> }; >>>> >>>> Is it because getFilterOperators is defined inside "exports" ?? >>>> >>>> 2) To use the filter API, and in particular the filterTiddler function >>>> defined in filters.js (see below), must I "require" filter.js, or >>>> widget.js, or wiki.js or ??? >>>> >>>> exports.filterTiddlers = function(filterString,widget,source) { >>>> var fn = this.compileFilter(filterString); >>>> return fn.call(this,source,widget); >>>> }; >>>> >>>> 3) the `this.wiki` of Widgets is initialized through the option >>>> parameters in the Widget constructor. >>>> so all the function exported by wiki.js are available through this.wiki >>>> ? >>>> >>>> 4) Is there like a list of "public" function available through $tw, >>>> $tw.utils and this.wiki ? I am trying to guess by reading through the >>>> various *.js modules, but I'm my knowledge of JS make this task a bit >>>> tedious... >>>> >>>> Thanks for any hint or explanations or info. >>>> Alain >>>> >>> -- >>> You received this message because you are subscribed to a topic in the >>> Google Groups "TiddlyWikiDev" group. >>> To unsubscribe from this topic, visit >>> https://groups.google.com/d/topic/tiddlywikidev/Ul3ezJU98QA/unsubscribe. >>> To unsubscribe from this group and all its topics, send an email to >>> [email protected]. >>> To post to this group, send email to [email protected]. >>> Visit this group at https://groups.google.com/group/tiddlywikidev. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/tiddlywikidev/5fcc3488-48af-4159-b267-f3a62fcf8a69%40googlegroups.com >>> <https://groups.google.com/d/msgid/tiddlywikidev/5fcc3488-48af-4159-b267-f3a62fcf8a69%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> -- > You received this message because you are subscribed to a topic in the > Google Groups "TiddlyWikiDev" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/tiddlywikidev/Ul3ezJU98QA/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/tiddlywikidev. > To view this discussion on the web visit > https://groups.google.com/d/msgid/tiddlywikidev/215cb573-7850-41ca-8cc5-99c49095c17e%40googlegroups.com > <https://groups.google.com/d/msgid/tiddlywikidev/215cb573-7850-41ca-8cc5-99c49095c17e%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "TiddlyWikiDev" 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 https://groups.google.com/group/tiddlywikidev. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywikidev/CAFF9YEEOc00SLW4GU38rgR3X0wmnWFSvOsC8RPrm7L6%3DC9HkiA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
