JavaScript Project Study:Four Steps To Build A Simple Guessing Number Game

So far I have learned some basic JavaScript language such as conditional keywords, logical operators, and built-in methods.

Today, we will build a simple guessing number game by applying those JS basic language.

Basically, the game is ask user to guess a number, if the number is match to the secret number, they win the game. If not, they will have to try again.

Step One: Create a simple HTML page and Link to the JS file

I start to build a simple HTML page and give a title "Guessing Game" for it. Then, I create a separate JS file named "game.js", and link to the HTML page.

Step Two: Create Secret Number and Prompt Question

In the JS file, I start to create a secretNumber which is 6. Six is a lucky number in China which means everything goes well as you wish.

Then I ask a prompt question:"Guess A Number", so user will enter a number.

Step Three: If users enter the right number, they will receive a message

It is conditional, so I use if keyword. Since the variable "guess" is a string type value, it won't equal to the number value "secretNumber". Therefore, we need to convert the string to number by writing Number(guess) === secretNumber.

Then, I create a alert message to tell the users that they guess right.

Step Four: If the number is too high or too low, guess again.

I use a else if keyword to set the Number (guess) is greater than secretNumber. And I also write the else keyword which set any number lower than secret number condition.

If a user guesses a higher number, it will alert him to try again.

If a user guesses a lower number, it will alert him to try again.

Comments

Intermediate Express.js: How To Add Styles & Partials in EJS File?

So far, we only have simple HTML tags and ejs tags in each ejs file. Every template page has no style at all. And the basic HTML header and footer are also missing. Today, I learned how to add styles and partials in ejs file. Link Style Step One: Touch a Separate CSS file I create a new directory "Style" under the "EJSDemo" directory, then I add a new CSS file "app.css" inside "Style" folder. Step Two: Add app.use(express.static()) in the app.js I add app.use(express.static("style")) in the "app.js". This will tell Express.js to serve the content of "Style" directory. Step Three: Write styles in CSS file I simple give body an orange background color and set text color to be grey. Step Four: Link to CSS file in the EJS file I just add <link> tag to link the "app.css" file on the top of the h1 tag in each ejs template. As the result, when I run the app and...

Seven Most Common jQuery Methods Last Part: ADD/REMOVE/TOGGLE CLASS()

Add, remove and toggleClass is also a very common way to manipulate style. .addClass() and .removeClass() I add two class selector in the style tag. Class one is to change text color to be green, and class two is change both text and background color. Now I refresh the page and change h1 text to green by using addClass() method: $("h1").addClass("one") . If you want to remove the style, you can change it to removeClass("one"). I do the same thing to the list. I change the list color and add a background color by adding the class two style value: $("li").addClass("two") . .toggleClass() According to jQuery, toggerClass method can add or remove one or more classes from each element in the set of matched elements, depending on either the class's presence or the value of the state argument. I only want to change the first list item color and background by writing: $("li").first().toggleClas...

Intro to Backend: Is Browser The Only Place To Send HTTP Request?

Today, I begin to learn the second part of web develop course: backend. Frontend is the stuff that we can see and interactive with, such as HTML, CSS, and JS. We can type our code, style our page, or write some function to make interaction. However, backend is everything else. For example, we type Target web address in the Internet Browser. As we hit "enter", there are a few steps to go through: 1. The HTTP request is sent to a particular server's IP address. 2. The server figures out what to send us 3. It sends a HTTP response back to us Those process we are hard to see, and it happens in less than one second. The instructor said that the browser is not the only place to send the HTTP request, and there are so many choices out there. In this learning course, we are going to use Postman App . Postman allows us to make HTTP requests and viewer responses. It is really for developers to understand how things are working or debug something. In the P...

Learn Bootcamp From Zero

Search This Blog