It's because the "printCounter()" function itself returns undefined. That's the console telling you the result of the expression. Change "printCounter()" by adding return "Hello Anton!"; to the end :-) It's a little confusing to say it "returns undefined"; really, it …

Nov 14, 2021 · I wanted to print only my HTML Table contents within the webpage that I am currently working on, however, when I tried to print it, it says "undefined". Why is that so? and is there any other way I could print my table that is connected in a database?

The first undefined is because f()() evaluates to whatever g returns, and g doesn't return anything. You store that undefined in x , then print it when you write console.log(x); . I'm guessing the second undefined is the result of running this in a console.

Oct 4, 2024 · JavaScript functions that query a database are often asynchronous, and failing to wait for the data to be fully retrieved before attempting to print it can lead to undefined or empty results. To avoid the "callback hell" that can arise from traditional callbacks, using Promises and async/await results in cleaner, more readable code. try {

Feb 19, 2023 · In JavaScript, every function returns a value, by default it is undefined. And since console.log() does not have a return value so it prints undefined. If we explicitly state the return value in the code then it resolves the issue of getting "undefined" as output.

Aug 31, 2022 · Hi, I am trying to create a function in javascript that queries data and returns it, if I pass the sql statement on. Unfortunaly as soon as I do anything else with the query result than to simply print it to console, it becomes undefined.

Dec 11, 2021 · If you try to print a print function then it'll return undefined and content. Just write the variable name in console. Similar to writing console.log(a+b) in the console, instead just write a+b.

Jan 30, 2022 · Data fetched from the database shows as "undefined" (Ajax) The "Modulos" part should show the database elements, but only several elements with the name "undefined" are shown. The "Cursos" part (made with xmlHttpRequest) does not give any problem.

Nov 29, 2017 · You're getting undefined printed as outcome because the method this.printName returns nothing, which prompts the Developer Tools console to print undefined after printing the actual result when the method is invoked. The solution is to return the value instead of printing.

Mar 23, 2023 · A detailed article about 'undefined' keyword in JavaScript. 7 tips on how to handle correctly 'undefined' and increase code durability.