2022.2

Initsmostsimpleformthecontentsoftheexpressionrefertoadatafield.Theywillbereplacedwiththe
valueofthatfieldifitexistsinthedatathatispassedtothetemplate.
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Expressionsinsectionsarealwaysresolvedusingthecurrent recordwithwhichatemplateis
merged.Inotherwords,theinputobjectisthecurrentrecord.
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InthecaseofHandlebarssnippets,youdetermineinascriptwithwhichdatathesnippetwillbe
merged.See"Handlebarstemplates"onpage774forinstructions.
ExpressionsareinsertedinsectionsandHandlebarstemplatesthesameway;see"Variabledatain
text:expressions"onpage722.
Itispossibletouselogicinanexpression,forexampletodisplaycontentonlyifafieldhasacertain
value.Howthisisdoneisdescribedinanothertopic:"BlockHelpers"onpage767.
Note: InOLConnect(asopposedtotheoriginalHandlebarslibrary),numbersinHandlebars
expressionsdonotneedtobesurroundedbyquotes.Forexample,tocalculate1+2youcan
write(add12)insteadof(add"1""2").
Accessing data at different levels
Afieldorkeynamewithouta.or/isassumedtorefertoafieldortableattherootofthedatawith
whichthetemplateisrendered.Thereareanumberofwaystoaccessdatathatisnotlocatedatthe
root.
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With.or/youcannavigatedownintotherecordorobject.Forexample:{{Cars.Brand}}and
{{Cars/Brand}}refertothesamefield.
Notethattoaccessaniteminadetailtableorarraydirectly,youalsohavetonavigatedown.For
example:Cars.Brand.Models[0]referstothefirstiteminModels.Alternativelyyoucanwrite:
Cars.Brand.Models.0
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@rootrepresentsthetoplevelofthedata.
Ifatemplateisrenderedwiththecurrentrecordorpartofit,@rootreferstotherootofthecurrent
record.
WithaJavaScriptobject,@rootreferstotherootlevelofthedatathatwaspassedtotheHandle-
barstemplate.
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Thebuilt-inhelpers#eachand#withdiveintoanobject-property,givingyoudirectaccesstoits
properties.(See"Usingfunctionsinexpressions:Helpers"onpage766andthedocumentation
ofHandlebars.)
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Use../tonavigateonelevelup.Thisisparticularlyusefulin#eachand#withblocks.
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