That was the missing piece, thanks BJ. Now I can call the macro with
*<<DaysToDate
"mm/dd/yyyy">>* and it returns the number of days difference. Not too
shabby! Thanks everyone for your help with this. I'll implement it as is
for now, and maybe later I'll come back to it, to see about turning it into
a dynamic, ticking countdown timer thingy to put at the top of my wiki.
On Sunday, 3 January 2016 08:30:41 UTC+13, BJ wrote:
>
> more like this
>
> exports.run = function(target_date) {
>
> // find the amount of seconds between now and target date
> var end_date = new Date(target_date).getTime();
> var current_date = new Date().getTime();
> var seconds_left = (end_date - current_date) / 1000;
>
> // calculate days left, based on 86,400 seconds per day
> var DaysToDate = parseInt(seconds_left / 86400);
> return DaysToDate;
> };
>
> })();
>
> all the best
>
> BJ
>
> On Saturday, January 2, 2016 at 1:51:06 AM UTC, Hegart Dmishiv wrote:
>>
>> Okay, I've made an attempt
>> <https://hegart-dmishiv.github.io/my-TW5-dev-instance/#%24%3A%2F_Macros%2FDaysToDate.js>
>>
>> at doing this myself. With my serious lack of programming skills, I've
>> cobbled together something from the TiddlyWiki core module
>> $:/core/modules/macros/now.js
>> <http://tiddlywiki.com/#%24%3A%2Fcore%2Fmodules%2Fmacros%2Fnow.js> and
>> the tutorial
>> <https://blog.grade.net/how-to-create-a-simple-javascript-countdown-timer>
>> I was looking at earlier. I didn't need the hours, minutes and seconds
>> information, so I dropped all that guff. For now I went with only making a
>> single call to the macro on loading a tiddler, rather than trying to make
>> it dynamically updating at the top of the wiki instance as a MOTD. It
>> seemed simpler to just at least display the number of days, once,
>> statically.
>>
>> However, I'm getting a big red Internal Javascript Error dialog box,
>> which says "ReferenceError: assignment to undeclared variable DaysToDate".
>> Could some kind Javascript guru take a look at my first teetering steps and
>> let me know where I went wrong please?
>>
>> Also, I have no idea of the format to use when calling the macro. What
>> I'm trying presently is *<<DaysToDate dd/mm/yyyy>>* but I'm not sure
>> what date format it will take. Of course, the preexisting Internal
>> Javascript error hampers my efforts so far to quantify this. ;-)
>>
>
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