sugar/common/internal/assertWritable.js

A Javascript utility library for working with native objects.

'use strict';

var isPrimitive = require('./isPrimitive');

function assertWritable(obj) {
  if (isPrimitive(obj)) {
    // If strict mode is active then primitives will throw an
    // error when attempting to write properties. We can't be
    // sure if strict mode is available, so pre-emptively
    // throw an error here to ensure consistent behavior.
    throw new TypeError('Property cannot be written');
  }
}

module.exports = assertWritable;