I have some simple code, and yet am receiving an unexpected result.
Let's take a look at the following function:
const test2 = () => {
let containsBitcoin = false
const str2 = "buy bitcoin"
if (str2.includes('bitcoin')) {
let containsBitcoin = true
}
return containsBitcoin
}
However, when I try to log the result using
console.log(test2())
I am getting false. I can't seem to understand why.
Here is the stackblitz link for reference.
The issue arises because you are redefining the containsBitcoin variable within your condition, rather than simply updating its value. As a result, the outer scope's containsBitcoin variable remains false.
const test2 = () => {
let containsBitcoin = false;
const str2 = "buy bitcoin";
if (str2.includes('bitcoin')) {
containsBitcoin = true;
}
return containsBitcoin;
}
console.log(test2())Has anyone else experienced issues with using a third-party API to fetch YouTube thumbnails with higher resolution, sometimes resulting in a code 404 error? I've been trying to replace the image source with a default YouTube thumbnail retrieved from i ...
I want to create a simple rating component with the following appearance: ◼◼◼◻◻ (score: 3 out of 5) Here is my JSX code snippet: var score = 3; var range = 5; { [...Array(range)].map((e, i) => ( <div className="rating-item" ...
Something that has caught my attention recently is the behavior of my website's AJAX implementation. When my site receives a response, it is inserted into div elements using the .innerHTML method. For example: $("#cont-btn") .click(function() { ...
I am having trouble with downloading a QR code canvas image with a background. The download works fine, but my device is unable to scan the code properly due to an incomplete border. I need to add a white background behind it to make it larger. Current im ...
I've been facing challenges while trying to retrieve user information from an array of objects using the fetch API. Despite attempts with constructors, functions, and binding methods, I couldn't get the desired results. Even using ComponentDidMou ...
When a directive called el2 is nested within another directive called el1, I face challenges in accessing variables that are "locally declared" in el1 (such as variables generated by ng-repeat, ng-init, etc) from el2. For a practical example showcasing th ...
Having some issues with my server setup. I have a server.js file running on node js. When I try to access the CSS and JS files linked in my index.html, I keep getting 404 errors even though the files are present in the specified path. I suspect there might ...
Is there a way to scale variable portrait and landscape images dynamically to fit proportionally within a browser window? You can find my current image resizing attempt here: http://jsfiddle.net/6pnCH/4/ I would like the image to be already scaled vertic ...
I'm currently using a code that works really well, but there's one thing I'd like to improve. When the mouse leaves, the animation stops abruptly which doesn't provide a great user experience. I have a few ideas: How can I make the &a ...
Is there a way to access an Excel document using JavaScript code without relying on an ActiveX control object such as shown below: var myApp = new ActiveXObject("Excel.Application"); myApp.workbooks.open("test.xls"); ...
My objective is to display a log file in real-time using a websocket connection. However, I am facing performance issues with Chrome when the paragraph ('p') element in the HTML becomes large (about 450 lines). This is the current implementation ...
I encountered an issue with my code, where I successfully created a <th> element initially, but faced problems when trying to create it repeatedly. function createTH(){ var noOfRow = document.getElementById("addItemTable").rows.length; var t ...
Hello there, I'm currently learning React and JavaScript but facing some challenges with a particular task. Let's dive into it! So, imagine I have an array like this: clients = ["Alex", "Jimmy"] and then I proceed to create another array using th ...
My current setup involves an HTML table that gets populated based on a mysql query. The table is enclosed within: <div id="punchclock" class="timecard"> I also have a jQuery script in place to calculate the totals of the times entered into this tab ...
I'm currently developing a JavaScript application and I've implemented a method to hide IP addresses on the client side using includes and requires. Here's how it works: First, in includes.php: require ('C:/Program Files/Apache/Apache ...
Hello there! I initially used this code to draw 12 lines, but now I am looking to incorporate a for loop and implement it in CSS. Can someone please guide me on how to proceed? <!DOCTYPE html> <html> <head> <style> #straigh ...
The following Jade code seems to be malfunctioning. head script(src='http://d3js.org/d3.v3.min.js') script(src='http://dimplejs.org/dist/dimple.v2.1.0.min.js') body script(type='text/javascript') var svg ...
I have a requirement to transform an XML String into JSON in order to retrieve user details. The approach I am taking involves utilizing the xml2js library. Here is my TypeScript code: typescript.ts sendXML(){ console.log("Inside sendXML method") ...
Having a JSON document with multiline string data is causing issues for me. I have attempted multiple options, but none of them have successfully solved the problem. For example: [ { "someString" : "A rather long string of English text, an error m ...
Upon calling this.getLeaderboard(); in the ngOnInit() function within leaderboard.component.ts, the leaderboard is only displayed on page load or refresh, which is expected. However, I also want to retrieve and display the leaderboard upon clicking a butto ...