function updateTitle(title) {
title = "updated title";
}
var currentTitle = "original title";
currentTitle = updateTitle(currentTitle);
console.log(currentTitle)I'm just starting to learn JavaScript and I'm curious about why this code behaves in this way?
Expanding on UnholySheep's point, it is essential to return the outcome of the function in order to utilize it later within your code.
Referencing MDN Web Docs
The return statement concludes function execution and defines a value to be sent back to the function caller.
In this scenario, the function caller is switchBooks(myBook);
function switchBooks(book) {
var book = "the book name";
return book; //This is what was missing
}
var myBook = "new book";
myBook = switchBooks(myBook);
console.log(myBook)
Make sure to include the return statement within the function.
function replaceBookName(book) {
return book = "the updated book name";
}
var currentBook = "old book";
currentBook = replaceBookName(currentBook);
console.log(currentBook)
I have created a script that contains various functionalities, including fetching data from a database and encoding it into JSON. However, I want to be able to call different functions to execute these scripts separately. When I attempted to define and c ...
We are in the process of creating a website that utilizes a basic JSON API (RoR) for displaying information on the page. This data is accessible to our clients, but crucial to our service, so we are taking precautions to prevent competitors from accessin ...
I am looking for a solution to prevent duplicate selections in multiple select dropdowns. I want to alert the user if they have chosen the same value in more than one dropdown. Should I assign different IDs to each dropdown or is it possible to use just on ...
I'm embarking on my Firebase journey and trying to follow a tutorial that seems to be a bit outdated. I could use some assistance in updating the code to match the newer version, as it appears the syntax has changed. The tutorial uses Firebase 7.15.1, ...
Currently, I'm in the process of integrating my Backbone.js application with the server. One thing to mention is that I have customized my sync function in the collection to utilize jsonp: window.Project = Backbone.Model.extend({ initialize:func ...
Below is the code I am using to generate a table containing an image along with a <textarea>: <table border="1" style="border-color: #a6a6a6" cellpadding="4" cellspacing="0" width="702">\ <col width="455"> <col width="230"> ...
I've developed a unique UserIcon Component that showcases an icon along with accompanying text. Take a look at the code snippet below: import React from "react"; import PropTypes from "prop-types"; import { withStyles, Avatar, Typography } from "@mat ...
When an ajax call is successful, I am triggering the Google conversion tracking code. Along with tracking the conversion, I also need to change the window location. Is there a method to receive a callback when the conversion tracking is successful, so tha ...
Struggling to figure out how to submit form data within the Angular Material stepper? I've been referencing the example on the angular material website here, but haven't found a solution through my own research. <mat-horizontal-stepper [linea ...
My shopping cart is filled with URLs that include a total key: The total value in the cart is <span id="cart-status" >1805.32</span> <ul> <li><a href='/Store/Category/Products?user=ADMIN&total=1805.32'& ...
Within my JSP, I have a string value stored in ${state.status.code} that I need to pass to a JavaScript function when a table element is clicked using onClick to trigger the showStatus function. Here is how I have attempted to achieve this: <c:set var= ...
In my Node.js routes.js file, I have a function implemented to check if a request is isAuthenticated before serving it: function isLoggedIn(req, res, next) { if (req.isAuthenticated()) { console.log('Session Expiry '+req.session.cook ...
I'm attempting to access the Binance API in order to obtain the current price of Litecoin (LTC) in Bitcoin (BTC). For this purpose, I have tested the following URL on my web browser: "https://api.binance.com/api/v1/ticker/price?symbol=LTCBTC". Now, I ...
If a video file cannot be played by the browser due to format or codec issues, I want to notify the user about it. When the browser is unable to play a video (because of unsupported format or codec), the onloadedmetadata event does not occur. I have some ...
Imagine a scenario where a property site displays the main viewed property ad at the top, with smaller ads in square divs below. When a user clicks on one of the smaller ads, it dynamically swaps places with the main ad thanks to JavaScript. All ad data is ...
This is my main component: import React, {useState} from 'react'; import SearchBar from '../components/SearchBar'; import WeatherDisplay from '../components/WeatherDisplay'; import LocationInfo from '../components/Locat ...
Encountering an issue with jQuery AJAX post in CodeIgniter, where clicking the submit button triggers an error. Below is the code snippet: home.js form.on('submit', function(e){ e.preventDefault(); var fields = {}; form.find(' ...
I'm currently working on a project where I need to upload a file to my server and save the filename to my database. Although I've successfully saved it to the database, I also want to save the username along with the filename. The issue is that I ...
I am facing an issue while attempting to create a basic CSS transition using JavaScript. The goal is for the start button to trigger the movement of an element, based on the duration of the keyframe animation. Then, clicking the end button should make the ...
I have written a code that exposes a C++ object to QML, and I want to verify the declared properties of the object using native JS methods. However, they are not working as expected. I created a method called FizzBuzzDerived.properties, which functions cor ...