some people use div/span/span/span instead of table… this routine will work the same with two case statements added, so you can use div and span instead of tr/td

// create elements... take an object in as parms, makes it easier to understand
  // what is supplied vs not
  newElement: function(parms_object ){
  var e=null;    
  switch(parms_object.type){
     case 'table':        
        e=document.createElement('table');
     break;
     case 'row':
        e=document.createElement('tr');        
     break;
     case 'column':
        e=document.createElement('td');   
     break;
  }
  if(parms_object.classname !== undefined)
     e.className=parms_object.classname;
  if (parms_object.value !== undefined)     
     e.innerHTML = parms_object.value       
  if(parms_object.parent !== undefined)
     (parms_object.parent).appendChild(e)
  return e;
},

getDom: function(){
  var wrapper = document.createElement("div");
  var table = this.newElement({type:'table'}) // note here, just type specified, to test code above
  
  // repeat the rows/columns block as needed  maybe in a loop as well.. 
 
  // get the list of items in the object
  for(item_name of Object.keys(this.MBW)){  // i think this returns keys in position order, not alphabetical
    var row=this.newElement({type:"row",classname:"temperatuur-row",parent:table})  
    // add a column for the data item name
    this.newElement({parent:row, type:"column",classname:"small",value:item_name}) // parms in any order
    // get the data for the item
    let item_value= this.MBW[item_name]
    this.newElement({type:"column",classname:"small",value:item_value,parent:row})
  }
  wrapper.appendChild(table)
  return wrapper
}  

I was hoping something in the next style would work.

   for (i = 0; i < this.MWB.length; i++) {
	var MWB = this.MWB[i];

and combining this with the text of the result. But I can’t figure it out.

Using replace or regular expression is just as much work in my opinion