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JavaScript JavaScript and the DOM (Retiring) Responding to User Interaction Delaying Execution with setTimeout()

Justin Houghton
Justin Houghton
4,560 Points

Error using setTimeout () in Workspace console

I know there's probably a simple explanation and I missed a typo or something! (or maybe window.setTimeout() only works in the browser console?) Please see below for the function in question.

window.setTimeout((something) => {
console.log(something);  
}, 3000, 'Greetings, everyone!');

When opening the javascript console on chrome - I am able to see the output of the function, but when I try to see the output of the function in the workspace console, (entering node temp.js in the console) I get the following error.

ReferenceError: window is not defined
at Object.<anonymous> (/home/treehouse/wor kspace/temp.js:1:63)
at Module._compile (module.js:570:32)
at Object.Module._extensions..js (module.j s:579:10)
at Module.load (module.js:487:32)
at tryModuleLoad (module.js:446:12)
at Function.Module._load (module.js:438:3) at Module.runMain (module.js:604:10)
at run (bootstrap_node.js:389:7)
at startup (bootstrap_node.js:149:9)
at bootstrap_node.js:504:3

2 Answers

ywang04
ywang04
6,749 Points

The error is shown clearly. ReferenceError: window is not defined That means window.setTimeout() only works in the browser console instead of node environment.

Michael Brown
Michael Brown
12,406 Points

I believe that "window" can only be used in the console after the page has fully been loaded.

See here: https://developer.mozilla.org/en-US/docs/Web/API/Window

What is it you're trying to accomplish with the setTimeout() function?

Justin Houghton
Justin Houghton
4,560 Points

The beginning of the lesson was an explanation and example of passing a function within a function. And then an explanation of window.setTimeout so that the string 'Greetings, everyone!' appeared in the console after a few seconds.