This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.
columnNumber property contains the column number in the line of the file that raised this error.
var e = new Error('Could not parse input'); throw e; console.log(e.columnNumber) // 0
Not part of any specification. Non-standard.