Change Object Index

Question

Is there way to change the index dynamically? or rebuild this object to where the 1 will be the Id of what ever object get passed into the function? Hope this makes sense.

export const createTree = (parentObj) => {

//keep in memory reference for later
const flatlist = { 1: parentObj }; <---- change the 1 based on parent.Id

...

}

My attempt thinking it would be easy as:

const flatlist = { parentObj.Id: parentObj };

Does this answer your question? [Is it possible to add dynamically named properties to JavaScript object?](https://stackoverflow.com/questions/1184123/is-it-possible-to-add-dynamically-named-properties-to-javascript-object) — pilchard, Sep 23 '21 at 22:03

score 1 · Accepted Answer · answered Sep 23 '21 at 21:52

1

Use computed property names to create a key from an expression:

const createTree = (parentObj) => {
  const flatlist = { [parentObj.id]: parentObj };

  return flatlist;
}

console.log(createTree({ id: 1 }));

answered Sep 23 '21 at 21:52

Ori Drori

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Change Object Index

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