＃ operator? operator@ operatorabs tagadd tagalign fieldand tagarray tagaudio tagbackgroundColor fieldbold fieldborder fieldborderBottom fieldborderColor fieldborderLeft fieldborderRight fieldborderStyle fieldborderTop fieldbottom fieldbox tagbutton tagcarat fieldcheckBox tagchoiceBox tagclass tagclear tagclientFrame tagcolor fieldconsole tagdialog tagdiv tagdo fieldeditable fieldellipse tagelse fieldeq tagfalse tagfocus fieldfocusOrder fieldfont fieldfor tagformat fieldge taggt tagheight fieldhotKey fieldif tagimg taginf taginline fieldinput taginvalid tagint tagitalic fieldjoin taglayer fieldle tagleft fieldlimit fieldline taglt tagmargin fieldmarginBottom fieldmarginLeft fieldmarginRight fieldmarginTop fieldmod tagmul tagne tagneg tagnot tagnull tagnum tagonClear fieldonClick fieldonContextClick fieldonExit fieldonFocus fieldonGet fieldonInput fieldonKeyDown fieldonSet fieldonKeyPress fieldonKeyUp fieldonMouseDown fieldonMouseIn fieldonMouseMove fieldonMouseOut fieldonMouseUp fieldonPull fieldonPush fieldonResize fieldonTimer fieldopenLink tagopacity fieldor tagpivot fieldplaying fieldput tagputError tagputLn tagrequestTransfer tagright fieldrotate fieldscalar tagscroll fieldscrollPos fieldselectable fieldsize fieldspacing fieldspacingBottom fieldspacingLeft fieldspacingRight fieldspacingTop fieldspan tagsplit tagsub tagtable tagtabRow tagthen fieldtimer tagtop fieldtransfer tagtransferAbility tagtransition fieldtrue tagunderline fieldvector tagvideo tagvisible fieldvoid tagwidth fieldwith fieldwrap fieldxor tag

for tag

Transient logic tag

Creates a loop in the document tree. Code inside the loop is invoked repeatedly for a specified number of iterations.

Sample usage

<i:for 1 limit=10 do=i> generates the list of numbers 1 2 3 4 5 6 7 8 9 10

Fields

Primary field

The counter value of the current iteration. Can be initialised to the required starting value. The default starting value is 1.

Secondary fields

do: the code to invoke repeatedly, for each iteration of the loop.
limit: the counter value of the final iteration. The loop will terminate after this iteration is invoked.

Behaviour

The count starts at the value in the primary field (1 if none is given), and the code in do is carried out once for each value up to and including limit, with the tag's name standing for the current count. Whatever the code generates each time, the for tag generates too, in order.

A for loop generates values and carries out actions, but its do code cannot create presentation tags. Use an array to create several tag instances.

Notes

A for loop executes synchronously and user interaction is not possible while a loop is running.
An alternative to the for loop that works asynchronously is the timer tag, which also invokes code repeatedly, except the code is invoked by a repeating time interval event which allows for user interaction between iterations.
To avoid degrading the user experience, synchronous looping within ioL is limited to 4096 contiguous iterations at a time (this number may vary between systems and includes interations created by nested loops). To keep the user interface responsive, any significant data processing and computation should instead be done natively by the app itself, not within the user's interface.