Exercises 1

1.Create a script that runs in non-strict mode but contains a function that runs in strict mode.

Answer:

See the Pen strict mode by oscar (@nopity) on CodePen.

2.Create a file that enforces strict mode throughout the file.

Answer:

See the Pen strict mode by oscar (@nopity) on CodePen.

Exercises 2

1.Create a function that generates a SyntaxError when run in strict mode.

Answer:

'use strict';


function bob(x) {
  delete x;
  return x;
}

2.Define a property of an object that throws a TypeError if you attempt to delete it.

Answer:

var dog = {};


Object.defineProperty(dog, 'prop' , {configurable: false});

delete dog.prop; 

Exercises 3

1.Create a function that accepts two octal numbers and returns the sum of them. The function must not generate any errors in strict mode.

Answer:

See the Pen octals by oscar (@nopity) on CodePen.