Is there a way to remove the initial number entered on a calculator's display in order to prevent the second number from being added onto the first one?

I am currently in the process of developing a calculator using HTML, CSS, and JavaScript. However, I have encountered an issue with my code. After a user inputs a number and then clicks on an operator, the operator remains highlighted until the user inputs a second number. The problem arises when the user enters the second number, as it gets concatenated to the first number instead of replacing it. How can I go about solving this issue? I would like the display to clear the previous number once the user starts inputting the second number.

While I have an idea of how to address this in pseudo code, I am uncertain if it is possible to implement this by pausing an element using JavaScript:

To achieve the desired behavior:

1. After the operator is clicked, pause the display for the user while clearing everything from the display behind-the-scenes. 2. When the user clicks on a digit, resume displaying everything to the user. By following this approach, the first number will still remain visible to the user when the operator is highlighted. Once the user begins entering the second number, only the second number should be displayed.

I aim to create functionality similar to the example found at: . In this sample scenario, the number displayed on the screen does not disappear after clicking an operator. Rather, it clears once a digit is selected post-operator click, showcasing the current number being entered.

// Rest of the content removed for brevity
javascripthtmlcssfrontendcalculator

Answer №1

Upon entering the second number, ensure that the display is cleared of the previous number and begins showing the user's new input.

To achieve this, simply keep track of when an operator button is clicked in order to respond correctly when the next number button is pressed.

Set a variable (such as clearDisplay) to true after any operator button is clicked.
Then, when a number button is clicked, check if the flag is true and if so, clear the display before setting the flag back to false.

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

The Xero Node OAuth Authorize Callback URL is malfunctioning after granting access

When utilizing the xero-node library to produce a Request Token using the getRequestToken function, the URL provided does not automatically redirect the user to the designated callback address specified in the configuration. Instead, a screen displaying a ...

javascriptnode.jsoauthoauth-2.0xero-api

What is causing my css elements to appear larger compared to other instances?

As someone who is not a designer, I find myself doing a lot of cutting and pasting for my side hustles. I believe many others can relate to this experience. Currently, I am working on a personal project that involves using tailwindcss, appwrite, and svelte ...

csstailwind-cssdaisyui

React Component - Element with an undefined value

When I tried implementing an Ionic Modal as a React Component, I encountered the following error message: Type '({ onClose, tipo }: PropsWithChildren<{ onClose: any; tipo: number; }>) => Element | undefined' is not assignable to type & ...

javascriptreactjstypescriptionic-frameworkfc

The button component in my React application is not functioning as expected, despite utilizing the useState and useEffect hooks

I'm having trouble with my Button not working, even though I am using useState and useEffect Check out the code below: import React, { useState, useEffect } from "react"; // import Timeout from "await-timeout"; import ...

javascripthtmlreactjs

Avoid automatically scrolling to the top of the page when a link is clicked

Within my ASP.NET MVC 5 application, there exists a partial view containing the following code: <a href="#" onclick="resendCode()" class="btn btn-link btn-sm">Resend</a> Additionally, on the View, the resendCode() function is present: funct ...

javascripthtmlasp.net-mvc

Why isn't my Angular directive able to access the parent controller's scope within its isolated scope?

I have meticulously followed the Angular documentation to implement a directive with an isolated scope that contains a few variables from the parent Controller's scope object. app.controller('MainCtrl', function($scope) { $scope.name = ...

javascriptangularjsangularjs-directiveangularjs-scopeisolate-scope

Error encountered while attempting to import external JSON data into SurveyJS

This Codepen example showcases SurveyJS using a simple JSON structure: var json = { "questions": [{ "type": "text", "title": "Test question 1", "name": "Test question" }, { "type": "comme ...

javascriptjqueryjsonsurveyjs

What could be causing the lack of color change in my boxes even after confirming the prompt?

function changeColor() { if (confirm("Press a button!") == true) { if(this.style.backgroundColor == "white") this.style.backgroundColor = "yellow"; else if(this.style.backgroundColor == "yellow") this.style.backgroundColor = "red"; else i ...

javascripthtmlcss

Loading images with CSS media queries is an essential technique for optimizing

Currently, I am exploring options to dynamically load a background image based on the width of the browser window. This way, I can optimize bandwidth usage by only loading the image that will be displayed. I am aware that using the HTML picture tag allows ...

cssmedia-queries

Retrieve the content of a particular text input field that is accompanied by a checkbox, and then display this information within an

In this example, the "textbox" is currently empty and requires user input. The checkbox should mirror what is typed in the textbox (type="checkbox" value=written-text-on-profile-textbox) When the checkbox is selected, it should take the text entered in th ...

javascriptjqueryforms

Apply a class to every group of x elements

In order to style the products displayed on a product list page, I have an unknown amount of divs, with each row containing 4 divs for individual products. My goal is to apply a specific CSS class to the first div in each row, then another class to the sec ...

css

Tips for monitoring the activities of a different user on a website

I am working on a project where I need to display all the activities of one user to another user on a web page. Essentially, the second user should be able to see everything that the first user is doing on their page. While I know it can be done using AJA ...

javascriptuser-interaction

Add a color gradient to text as it animates without displaying any code tags (HTML, CSS, JS)

I have a unique text animation that loads when the page loads. The characters will be gradually written to the screen with some words having a gradient effect. While I've managed to successfully apply the gradient, there seems to be a pause when it re ...

javascripthtmlcssanimationgradient

How can I safeguard my HTML and CSS content from being altered using tools similar to Firebug?

Is there a method to deter the alteration of HTML and CSS components on a webpage using tools similar to Firebug? I have noticed that certain users are changing values in hidden fields and modifying content embedded within div or span tags for their perso ...

phpjavascripthtmlcss

Show the current temperature data retrieved from the weather API

I'm trying to figure out what's causing the issue with the temperature not displaying. Can anyone help me identify and fix the error? <script type="text/javascript"> $.ajax({ url: 'https://api.weather.gov/gridpoints/EWX ...

javascripthtmljsonajaxapi

What exactly is the function of $fix-mqs within the IE Sass mixins created by Jake Archibald?

I'm really struggling to understand the purpose behind using $fix-mqs in the mentioned link: Although I can grasp how the rest of the mixin functions, this particular part has me stumped. In a project where I've utilized this pattern, everything ...

cssinternet-explorersass

The moduleId in "Ng2SliderComponent" must be a valid string

My angularcli.json configuration looks like this: "scripts": [ "../node_modules/ng2-slider-component/ng2-slider.component.js", "../node_modules/ng2-slideable-directive/slideable.directive.js", "../node_modules/ng2-styled-directiv ...

javascriptangular

Is there a way for me to detect if the user has manipulated the CSS or JavaScript in order to alter the look of my website?

Is there a way to determine if someone is utilizing script or CSS extension tools? For instance, if they have adjusted alignments, applied display: none; to multiple elements, or utilized jQuery's .hasClass to manipulate divs. ...

javascriptjquerycssgoogle-chrome-extension

What could be causing my dangerouslySetInnerHTML to show altered content?

I am working on a project using React and have encountered an issue with the code: const externalMarkup = ` <a data-refpt='DN_0OKF_177480_ID0EMPAC' /> <ol> <li value='1'> <p> <strong&g ...

javascripthtmlreactjs

Update the page when the React route changes

I am facing an issue with a function in a component that is supposed to load certain variables when the page is fully loaded. Interestingly, it works perfectly fine when manually reloading the page. However, if I use a NavLink to navigate to the page, the ...

javascriptreactjsreact-router