Local Storage edit not working

Question

localStorage.setItem('gameState', '{"
grid ":{"
size ":4,"
cells ":[[{"
position ":{"
x ":0,"
y ":0},"
value ":1024},{"
position ":{"
x ":0,"
y ":1},"
value ":1024},{"
position ":{"
x ":0,"
y ":2},"
value ":1024},{"
position ":{"
x ":0,"
y ":3},"
value ":1024}],[{"
position ":{"
x ":1,"
y ":0},"
value ":1024},{"
position ":{"
x ":1,"
y ":1},"
value ":1024},{"
position ":{"
x ":1,"
y ":2},"
value ":1024},{"
position ":{"
x ":1,"
y ":3},"
value ":1024}],[{"
position ":{"
x ":2,"
y ":0},"
value ":1024},{"
position ":{"
x ":2,"
y ":1},"
value ":1024},{"
position ":{"
x ":2,"
y ":2},"
value ":1024},{"
position ":{"
x ":2,"
y ":3},"
value ":1024}],[{"
position ":{"
x ":3,"
y ":0},"
value ":1024},{"
position ":{"
x ":3,"
y ":1},"
value ":1024},{"
position ":{"
x ":3,"
y ":2},"
value ":1024},{"
position ":{"
x ":3,"
y ":3},"
value ":1024}]]},"
score ":272,"
over ":false,"
won ":false,"
keepPlaying ":false}');

My script is just a simple one meant to implement into the browser bar of chrome but it returns SyntaxError: Unexpected token ILLEGAL. I have tried setting the local storage to something simple and it works. Can someone tell me what is wrong or rewrite it so it works.

Answer 1

Like mentioned in the comments, you had wrong indentation as well as some extra spaces and missing commas.

localStorage.setItem('gameState', '{"grid":{"size":4,"cells":[[{"position":{"x":0,"y":0},"value": 1024},{"position":{"x":0, "y": 1}{"value":1024}},{"position":{"x":0, "y": 1}{"value":1024}},{"position":{"x":0, "y": 1}{"value":1024}},{"position":{"x":0, "y": 1}{"value":1024}},{"position":{"x":0, "y": 1}{"value":1024}},{"position":{"x":0, "y": 1}{"value":1024}},{"position":{"x":0, "y": 1}{"value":1024}},{"position":{"x":0, "y": 1}{"value":1024}},{"position":{"x":0, "y": 1}{"value":1024}},{"position":{"x":0, "y": 1}{"value":1024}},{"position":{"x":0, "y": 1}{"value":1024}},{"position":{"x":0, "y": 1}{"value":1024}},{"position":{"x":0, "y": 1}{"value":1024}},{"position":{"x":0, "y": 1}{"value":1024}}]]},"score":272,"over":false,"won":false,"keepPlaying ":false}');