Expected an identifier and instead saw '{a}'. code example

Example 1: expected an identifier and instead saw const

"language": {
        "javascript": {
            "linting.prefer": [
                "JSHint"
            ],
            "linting.usePreferredOnly": true
        }
    }

Example 2: Expected an identifier and instead saw 'const'.

Expected an identifier and instead saw 'const'.