Implemented buildObjectExplicit for building an xml string from a json object created with explicitChildren

[flodev]

• fixed trimming of child text items
• implemented that single text nodes wont get trimmed
• fixed catching undefined text value
• added comments, fixed non cdata values like numbers
• added onclosetag and onopentag events

[flodev]

#299

[coveralls]

Coverage increased (+0.5%) to 97.429% when pulling deff401 on flodev:master into 7b2a93a on Leonidas-from-XIV:master.

[mantasindrasius]

Is it possible to have this functionality soon please? Without proper XML serialization it draws this library unusable for our company's use case.

[mor-o]

can this please be merged?
we need this functionality as well

[danielle44]

@flodev Hi, Can this be merge soon please?

[yana-walkme]

hi @Leonidas-from-XIV
this PR is really important for us
and causing a bug that the parsing and building are not symmetric
we are using the parsing to get a JSON which we filter based on some criterias
and then we want to use the builder to build the XML again
while using the following options
var options = { preserveChildrenOrder: true, explicitChildren: true, charsAsChildren: true };

if the coverage increased and all tests passed, is there any other objection to merge this PR?

[Leonidas-from-XIV]

What is blocking is that the branch is currently not mergeable because of conflicts with master. If someone is willing to rebase it and make sure there are no regressions I can merge it.

Although I would prefer that the buildObject function would detect the explicitChildren on its own but oh well.

[flodev]

Sorry I don't have time get into the code again.
My fork contains the functionality https://github.com/flodev/node-xml2js
I implemented the requirement once for a company. In addition my tests are covering that the input will match the output and it is considered as stable.
It worked for me. I don't now how many features were added to xml2js between July 2016 and now so you have to consider for yourself if this is an option.