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

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
210,423 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.

Thanks for taking the time to explain that.