While I have a basic understanding of closures and scopes, I am in need of a more detailed explanation for the code snippet below.
for (var i = 0; i < 10; i++) {
i // no console.log
}
Expected Output
9
I am curious as to why the output does not display from 0 to 9 when running on the Chrome developer console.
Your inquiry appears to be somewhat unclear, but it seems you are questioning why the result stops at 9, rather than 10 (even though no output method is specified in your example).
The reason the loop ends at 9 instead of reaching 10 is due to your usage of the < operator to compare i with the constant 10, indicating "less than 10". As you increment by whole numbers, 9 will be the final integer before your loop exits the < 10 range and breaks out of the loop.
If you expect 10 as the ultimate output, consider using the "less than or equal to" operator (<=) to compare i with 10.
Update
You have modified your original question, and the answer can be succinctly summarized in another response on Stack Overflow:
All javascript statements have a value, including the block executed within looping constructs. After the loop block is executed, the final value is returned (or
undefinedif no operations occur). The statement that ultimately produces the return value "100" isnumbers[i] = i+1;, where the last iteration of i+1 gives the result of 100, and assignment operations return the assigned value.
If you see this output in the console, it's because the console displays the final result of the last statement executed in the program.
In this scenario, the for loop produces a final value of 9.
Although it may sound peculiar to attribute a result to a for statement (as statements generally do not yield results), they can produce an outcome within the context of the entire program execution. This outcome can be accessed by the environment running your code.
For instance, you can achieve similar results using the eval() function, which provides the final statement's result.
var n = eval('for(var i = 0; i < 3; i++) {i}');
console.log(n);
In this case, you will see 2 in the console as the evaluated result of the program, even though the sole outcome results from the for loop returning the final statement result of its last iteration.
I am looking to dynamically change the color of the divs based on values from my database. Here is what I have so far: Database: shape id is_success id1 0 id2 1 id3 0 id4 1 <div class="container" style="background: black; widt ...
Error at the Top Not Being Recognized: Hello, I am facing an issue where the top part of the webpage does not behave correctly when the window size is less than 1300px. The condition set for 100% top only applies after refreshing the page; otherwise, it d ...
I am currently working on an app using Ionic, Angular2, and Firebase. My approach involves saving the auth.currentUser information in the localStorage when a user logs in or registers. However, I recently discovered that having the user variable set in th ...
This is a sample script for fetching data from a database using AJAX. <!DOCTYPE html> <html> <head> <script type="text/javascript"> function loadJSON() { var data_file = "http://www.example.com/data/connect.php"; var xmlhttp; ...
Looking to update the URL search parameters when a user enters them in the search panel on a page. Currently attempting: $( document ).ready(function() { if ($('.o_website_license_search_panel').length) { $('.o_website_license_s ...
I have a form that I am submitting using a submit function. However, instead of using document id for submission variable, I am utilizing classes. $(".modalform").submit(function(event) { /* prevent form from submitting normally */ event.preventDefa ...
i am currently working on implementing dynamic open graph meta tags using this code snippet async asyncData({ app, route }) { let postDetails = await app.$axios.get(`/api/v1/news/single/${route.params.id}`); postDetails = postDetails.da ...
After setting a fixed height for the image, I noticed that the same height is also being applied to the thumbnails. How can I avoid this issue? <Carousel width="600px" dynamicHeight={false}> {data?.book?.images.map((image, i) => ( ...
I've encountered an issue with a form that includes: <input type="password" id="password" /> I want to display some readable text temporarily, so I used the following code: $('#password').prop('type', 'text'); ...
My goal is to implement a JavaScript function that will shade specific areas of canvas drawings when clicked. Below is the code I have that draws a square inside a circle. <!DOCTYPE HTML> <html> <head> </head> <body&g ...
I am currently working on a project that involves laying out multiple Kendo windows in rows. Specifically, I need to display 4 windows in each row and have them shift left when closed. My framework of choice is Bootstrap 3. Everything works as expected w ...
My objective is to implement a feature where clicking on one button will automatically select all other buttons associated with it. https://i.sstatic.net/Ela05.png For example, when I click on "book1", I want it to also select buttons 1, 2, 3, 4, and 5 t ...
I'm facing an issue where the cookie containing my authentication token doesn't get passed along with my requests. After authenticating in Chrome, the response sets the cookie correctly, but it's not included in subsequent requests. This is ...
In my Vue component for Plaid Link, there is a function/action in my Vuex store called onSuccess. This function is supposed to call my backend API to exchange the public token for an access token and send some data about the link to the backend. However, I ...
Utilizing DOMSubtreeModified to track all changes in a div's DOM structure. var stoppedTyping=""; $(".jqte_editor").on("DOMSubtreeModified", function(e) { if (stoppedTyping) clearTimeout(stoppedTyping); stoppedTyping = setTimeout(function() ...
Currently, I am utilizing WebdriverIO in combination with CucumberJS for testing purposes. The following code functions correctly in Firefox; however, I encounter errors in Chrome which display element is not clickable. I am seeking a solution using JavaSc ...
I've encountered an issue while attempting to loop through a JSON object to extract data. Whenever I run my code, I receive this error: Type Error: element.listing.forEach is not a function. It's worth mentioning that I've used this method ...
I am currently facing a rendering issue. In my componentDidMount function, I am using axios to make a GET call and then updating the state with the received JSON data. The problem arises when I try to access the keys of the JSON in the render method becau ...
The specific problem arises when defining the module export for the HelpCommand class: **module.exports = class HelpCommand extends Command {** The content of the help.js file, without URLs, is as follows: const fs = require('fs'); const { Comma ...
One of the functionalities on my website involves dynamically inserting a script into the head when a form element is focused, enabling it to load faster. This process is achieved using basic vanilla JS rather than React Helmet, as shown below: const handl ...