Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

JavaScript JavaScript Loops, Arrays and Objects Simplify Repetitive Tasks with Loops What are Loops?

Posted by mujuhm
mujuhm
8,537 Points

re ESLint error document.write(randNum + ' ');

The script in the lesson worked when I duplicated it on the Brackets editor on my os, However, why do I get an error in Brackets from JSLint that 'document' is not defined. [ document.write(randNum + ' '); ]

There are also 2 other warnings: -missing 'use strict' statement [ return Math.floor(Math.random()*upper)+1 ] -document.write can be a from of eval. [ document.write(randNum+''); ]

2 Answers

Steven Parker
Steven Parker
229,695 Points
Steven Parker
Steven Parker
229,695 Points

The error is because you're using a host-based JavaScript engine, and the "document" object is something provided only in a browser.

The warnings are typical "best practice" reminders. While optional, "use strict" enforces good code practices. And both "document.write" and "eval" can pose security concerns when used carelessly, but this is not something you need be concerned with during the early stages of learning.

mujuhm
mujuhm
8,537 Points
mujuhm
mujuhm
8,537 Points

Thanks for taking the time to explain that.