Scripted Reports use the Handlebars library to render templates, so all the "variables," "if statements," and "for loops" can be used for template rendering.
https://handlebarsjs.com/guide/
Script:
const variableObject = {
someString: "Hello",
someNumber: 42,
someArrayOfString: ["w", "o", "r", "l", "d"],
};
SR.render(variableObject);
Template:
Static text,
{{someString}}
{{#each someArrayOfString}}
<span>{{this}}</span>
{{/each}}
{{someNumber}}
Static text.