Javascript reserved words?

Question

I have some JS code which generates the following object,

return {
 "type": "some thing",
 "width": 2,
 "colour": "#AA12BB",
 "values": [2,3,4]
}

The creation of this isn't a problem.

In writing the test for the method that returns this am having a problem accessing the width/type attributes: the following assertions fail (it leads to a execution/syntax error, which go away when i comment them).

assertEquals('some thing', jsonObj.type);
assertEquals(2, jsonObj.width);

while

assertEquals('#AA12BB', jsonObj.colour);

passes

Since I cannot change the key names for what I am doing, is there any way to access these values?

Answer 1

Try this:

assertEquals('some thing', jsonObj["type"]);
assertEquals(2, jsonObj["width"]);

Answer 2

dot notation does not work with reserved words, such as "type". In that case you have to use array notation.

Mozilla's list of Java Script Reserved words.

Answer 3

Your example works fine for me. ‘width’ and ‘type’ are not reserved words in JavaScript (although ‘typeof’ is).