DocXtemplater multiple tags on a single line behavior - docxtemplater

Question

I am replacing an old program for template-merging with docxtemplater and am trying to recreate the old programs prefix functionality.
I want the line removed if all prefixed tags ({$tag}) on that line are undefined.
The issue being that if all the tags on that line are undefined docxtemplater still creates a blank line.
All the examples I have found online tend to reference inverted-sections or rawtags, which both seem to be designed for a single tag per line opposed to multiple tags side by side.
I have looked into using rawtags and writing a custom-parser / nullGetter. However I am still none the wiser to removing the blank line.
I am using:
const options = {
paragraphLoop: true,
linebreaks: false,
parser: function(tag) {
return {
get(scope, context) {
console.log(tag);
console.log(scope);
console.log(context);
if (tag[0] == "$") {
tag = tag.substr(1); // needs to then remove line break
}
return scope[tag];
}
}
},
nullGetter: function nullGetter(part, scopeManager) {
if (!part.module) {
return "";
}
if (part.module === "rawxml") {
return "";
}
return "";
}
};
doc = new Docxtemplater(zip, options);
The prefix in the program I am replacing acts as follows:
data:
existingtag: EXISTINGTAG
Template.docx:
1 text above
{$existingtag}{$nonexistingtag}
text below
2 text above
{$existingtag}{$existingtag}
text below
3 text above
{$nonexistingtag}{$nonexistingtag}
text below
old program produced (What I want to produce)
1 text above
EXISTINGTAG
text below
2 text above
EXISTINGTAGEXISTINGTAG
text below
3 text above
text below
my docxtemplater produces (extra line in example 3):
1 text above
EXISTINGTAG
text below
2 text above
EXISTINGTAGEXISTINGTAG
text below
3 text above
text below

Answer 1

I'm the creator of docxtemplater and I don't think that there is a way to do what you want to achieve without taking a lot of time to handle this case.
The problem is that the tags such as :
{xxx}{yyy}
have access only to the text that they are in, but they cannot have any effect ouside of that text, so it is not possible to remove a paragraph conditionnally.
There is one tag that has access to the whole paragraph, that is the raw xml tag, prefixed by a "#", like this :
{#raw}
It is used to add rawXML and if the raw value is an empty string, than that paragraph will be removed.
Edit : I have actually worked on a module back in the time to achieve quite similar functionnality, it is a paid module : https://docxtemplater.com/modules/paragraph-placeholder/