Using the ternary operator to insert elements from one JavaScript array into another array

In my React form, I am dealing with an array of objects that represent different fields. Depending on a boolean state, I need to dynamically change the sequence of fields displayed. While I have no trouble inserting a single object into the array, I am struggling to figure out how to insert multiple objects at a specific index.

const [shortForm] = useState(false);

const shortFormFields = {"fieldName":"foo"}

const longFormFields = [
      {"fieldName":"bar"},
      {"fieldName":"baz"},
      {"fieldName":"qux"}]


const finalFieldList = [
      {"fieldName":"waldo"},
      shortForm === true? shortFormFields : INSERT-BAR-BAZ-QUX-HERE,
      {"fieldName":"xyzzy"}]

Answer №1

To incorporate both the spread syntax (...) and the ternary operator in JavaScript, you can follow this example:

const updatedFieldList = [
 { "fieldName": "waldo" },
 ...(isShort ? [shortFields] : longFields),
 { "fieldName": "xyzzy" }
];

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