It tells the browser, “Hey, this is a section heading.” The current version is HTML5.Īnd CSS, or Cascading Style Sheets, is for adding styles, such as colors, font type, and spacing. HTML, or hyper-text markup language, is used for defining the parts of a webpage, such as headlines and body text. And they are the place to start if you want to work in tech, whether you end up going into front end development, back end development, web design, visual design, or even digital marketing.Īnd in case you haven’t started learning them yet…what the heck are HTML and CSS?
Unlike industries that require a computer science degree you might not already have, tech jobs are skill-based - knowing how to do the job and achieve results is what matters in software development.Īccessibility is another reason tech is a great industry to get into - you can learn tech skills from tutorials and bootcamps and still become a successful software engineer.īoth HTML and CSS are fundamental tech skills (and programming languages) you can start using to work on real projects within weeks of diving in. We can use the += operator to do that.HTML & CSS Are the Building Blocks of a Tech Career - and They’re Also Kind of MagicalĪ big selling point for a career change to tech is the short amount of time it takes to get up to speed with tech skills and become job-ready. In the default case, so whenever the user don't hit these special symbols we just want to append the clicked button's innerText to the display's innerText. To do that we'll use the String.slice() method, but we only want to do that if the display has any value. If the user hits the back arrow we need to remove the last character from the display's innerText. More details If you want to replace eval I suggest using Math.js lib.
⚠️ You should not use eval in user facing applications, because it can be abused and external code can be run with it. Erros can happen when we have syntactically wrong math expressions, for example //(9(, ine these cases we'll set the display's innerText to display 'Error'. We need to wrap this into a try catch block to handle errors. We need to provide the display's content to eval and it will evaluate and return the result, so we should set the result of the eval call to the display's innerText. Don't forget to add break at the end, because it is needed to prevent the execution of the code defined in other case blocks.įor the equal button we'll use javascript built in eval function. To do that we can access our display reference and set the innerText to an empty string. In the first case, when the user hits the "C" button we'd like to clear the display.
To determine what should we do, we'll use e.target.innerText, which will simply give back the label of the button that was clicked. (An advanced solution would be to only add event listener to the buttons container and use event bubbling but this is a more beginner-friendly solution.) To add event listeners for the buttons, we'll map through the buttons array and add a click event listener for each. The next and last step we have to make is to add event listener to the buttons and build the functionalities. Then we have a div with the class of buttons which will represent the keypad of the calculator.Įnter fullscreen mode Exit fullscreen mode It is empty, because we will modify its content from Javascript. Inside our container we have an empty div with the id of display, and this will be the display of our calculator. We will use these wrappers to position our calculator on the page. In the body we have a section and inside that a div with a container class. This needs to be at the bottom, because this way, when our javascript runs, the html elements required for the calculator will be in the DOM. At the bottom of our body I included the index.js script that we will create later. We'll start out with a standard HTML5 boilerplate. The html will be pretty simple for this project. If you would watch a detailed step-by-step video instead you can check out the video I made covering this project on my Youtube Channel: In my opinion this is a really good beginner project for those who want to become web developers. You'll learn about event handling, and DOM manipulations throughout the project.
In this tutorial we will create a fully working calculator using only HTML, CSS and vanilla Javascript.