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Background: I'm currently reading "Web Development with Node and Express" by Ethan Brown (great book by the way for those learning node and express) and I got stuck on Chapter 5 - Quality Insurance.
Everything was running smooth. First I ran the following:
npm install --save-dev mocha
npm install -g mocha
npm install --save-dev chai
npm install --save-dev zombie
Problem: Then I ran (as the book instructed):
mocha -u tdd -R spec qa/tests-crosspage.js 2>/dev/null
But this wasn't doing anything. So then I ran:
mocha -u tdd -R spec qa/tests-crosspage.js
And then this error appeared:
/Users/esanz91/Desktop/CodingNotes/Node/MySite/node_modules/zombie/node_modules/jsdom/lib/jsdom/level2/html.js:405 var nonInheritedTags = new Set([
ReferenceError: Set is not defined
Versions: Just to give you guys an idea, I have the following versions installed.
cmd:
npm list --depth=0
results:
Also, I'm running on Node 0.10.
How can I fix this issue?
Thanks!
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To solve the "ReferenceError require is not defined" error, remove the type property if it's set to module in your package. json file and rename any files that have a . mjs extension to have a . js extension.
The JavaScript exception "variable is not defined" occurs when there is a non-existent variable referenced somewhere.
Reference errors in Javascript are mainly thrown when an attempt is made to reference a variable that does not exist or is out of scope. Therefore, in the majority of cases, a ReferenceError can be fixed by making sure that the referenced variable is defined correctly and is being called in the correct scope.
A not defined error is when we did not declare the variable and tried to call that variable. In JavaScript, we can declare variables without adding const , let , or var , and we won't get an error of undefined or not defined .
I found the answer to my own question. I actually needed to downgrade Zombie 4.0.7 to 3.1.x so that the mocha test command could work with Node 0.10.
Edit1: I decided to upgrade my Node version to 0.12 and my Zombie version back up to 4.0.7 and that worked too. (seems like Node 0.10 and Zombie 4.0.7 not compatible...)
Edit2: For anyone reading the book, I suggest looking at the github repo by the author himself. Take a look at the package.json file to see which version of the modules he uses.
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