Dynamically choosing TextBlock and Shapes

GoJS
1

I want to choose TextBlock dynamically based on our nodedataarray.

For example,

diagram.add(
    $(go.Part, "Vertical",
      $(go.TextBlock, { text: "a Text Block" }), //Textblock 1
      $(go.TextBlock, { text: "a Text Block", stroke: "red" }),  //Textblock 2
      $(go.TextBlock, { text: "a Text Block", background: "lightblue" }),  //Textblock 3
      $(go.TextBlock, { text: "a Text Block", font: "bold 14pt serif" })  //Textblock 4
    ));

Now, I want to choose only Textblock 1 for 1st node and Textblock 3 for 5th node. (Dynamically I want to mention which Textblock need to be choosed while defining node in nodearray

Can you help in this?

2

What do you mean by “choose”? What is it that is supposed to distinguish the TextBlocks in those cases?