Module build failed: SyntaxError: Unexpected token regarding quotation marks

Question

Why is it giving this error when i surround the key with quotation marks?:

data[0].push({ "col" + (i+1): results.data[i].id});

Answer 1

Try using brackets (computed property name from ES6):

data[0].push({ ["col" + (i+1)]: results.data[i].id});

EDIT: If you are able to use ES6, you can also use template literal, as suggested by Ismael:

data[0].push({ [`col${i+1}`]: results.data[i].id});