Handlebars Mustache - Is there a built in way to loop through the properties of an object

Question

As the title of question says  is there a mustache handlebars way of looping through an object properties   So with   var o       bob    For sure     roger   Unknown     donkey   What an ass      Can I then do something in the template engine that would be equivalent to  for var prop in o           with say  prop a variable in the template and value the property value

User · Answer

This is  Ben s answer updated for use with Ember   note you have to use Ember get because context is passed in as a String    Ember Handlebars registerHelper  eachProperty   function context  options      var ret         var newContext   Ember get this  context     for var prop in newContext          if  newContext hasOwnProperty prop           ret   ret   options fn  property prop value newContext prop                 return ret        Template      eachProperty object       key      value   lt br  gt     eachProperty

User · Answer

It s actually quite easy to implement as a helper   Handlebars registerHelper  eachProperty   function context  options        var ret           for var prop in context                ret   ret   options fn  property prop value context prop               return ret        Then using it like so      eachProperty object         property      value   lt br  gt     eachProperty

User · Answer

Built-in support since Handlebars 1 0rc1  Support for this functionality has been added to Handlebars js  so there is no more need for external helpers   How to use it  For arrays      each myArray       Index     index   Value     this      each     For objects      each myObject       Key     key   Value     this      each     Note that only properties passing the hasOwnProperty test will be enumerated

User · Answer

EDIT  Handlebars now has a built-in way of accomplishing this  see the selected answer above  When working with plain Mustache  the below still applies   Mustache can iterate over items in an array  So I d suggest creating a separate data object formatted in a way Mustache can work with   var o       bob    For sure     roger   Unknown     donkey   What an ass     mustacheFormattedData      people           for  var prop in o     if  o hasOwnProperty prop        mustacheFormattedData  people   push          key    prop         value    o prop                   Now  your Mustache template would be something like      people       key       value      people     Check out the  Non-Empty Lists  section here  https   github com janl mustache js

User · Answer

I was using old version 1 0 beta 6 of handlebars  i think somewhere during 1 1 - 1 3 this functionality was added  so updating to 1 3 0 solved the issue  here is the usage   Usage      each object     Key    key     Value   this      people

User · Answer

This is a helper function for mustacheJS  without pre-formatting the data and instead getting it during render   var data         valueFromMap  function             return function text  render                    this  will be an object with map key property                text will be color that we have between the mustache-tags                in the template                render is the function that mustache gives us                 still need to loop since we have no idea what the key is                but there will only be one             for   var key in this                    if  this hasOwnProperty key                         return render this key  text                                                           list            blueHorse                color   blue                      redHorse                color   red                       Template      list              lt span gt color     valueFromMap  color   valueFromMap   lt  span gt   lt br  gt           list     Outputs   color  blue color  red    order might be random - it s a map  This might be useful if you know the map element that you want  Just watch out for falsy values

User · Answer

Amit s answer is good because it will work in both Mustache and Handlebars   As far as Handlebars-only solutions  I ve seen a few and I like the each with key block helper at https   gist github com 1371586 the best    It allows you to iterate over object literals without having to restructure them first  and  It gives you control over what you call the key variable   With many other solutions you have to be careful about using object keys named  key   or  property   etc

User · Answer

Thanks for Ben s solution  my use case to display only particular fields in order  with object  Code       handlebars registerHelper  eachToDisplayProperty   function context  toDisplays  options        var ret           var toDisplayKeyList   toDisplays split           for var i   0  i  lt  toDisplayKeyList length  i              toDisplayKey   toDisplayKeyList i           if context toDisplayKey                 ret   ret   options fn                   property   toDisplayKey                  value   context toDisplayKey                                       return ret        Source object        locationDesc  abc   name  ghi   description  def   four  you wont see this     Template      eachToDisplayProperty this  locationDesc description name         lt div gt            property   ---   value        lt  div gt         eachToDisplayProperty       Output   locationDesc --- abc description --- def name --- ghi

[javascript] Handlebars/Mustache - Is there a built in way to loop through the properties of an object?

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