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Found 74 results

  1. Hello, this is my first time posting, and I wanted to know how to start of on an id using the W3Schools Tab function. Here is the code! <!DOCTYPE html> <html lang="en"> <head> <title>(null)'s Website</title> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css"> <link href="V1.css/Home.V1.css" rel="stylesheet"> <link href="V1.css/Home.V1.Slideshow.css" rel="stylesheet"> <script type="text/javascript" src="V1.js/Tabs.js"></script> <script type="text/javascript" src="V1.js/Slideshow.js"></script> <script src="https://www.w3schools.com/lib/w3data.js"></script> </head> <body> <div class="tab"> <button class="tablinks" onclick="openCity(event, 'Home')">Home</button> <button class="tablinks" onclick="openCity(event, 'News')">News</button> <button class="tablinks" onclick="openCity(event, 'Tokyo')">Tokyo</button> </div> <div id="Home" class="tabcontent"> <h3>Home</h3> <h2>Automatic Slideshow</h2> <p>Change image every 2 seconds:</p> <div class="slideshow-container"> <div class="mySlides fade"> <div class="numbertext">1 / 3</div> <img src="V1.png/NEW!.png" style="width:100%"> <div class="text">Loving the look of our new website?</div> </div> <div class="mySlides fade"> <div class="numbertext">2 / 3</div> <img src="https://img.clipartfest.com/182119c47939e54a12e23325c2153d0d_garfield-clip-art-garfield-clipart_500-500.jpeg" style="width:100%"> <div class="text">Caption Two</div> </div> <div class="mySlides fade"> <div class="numbertext">3 / 3</div> <img src="https://s-media-cache-ak0.pinimg.com/736x/35/a5/26/35a526aa3f44fb009da502db1127a82c.jpg" style="width:100%"> <div class="text">Caption Three</div> </div> </div> <br> <div style="text-align:center"> <span class="dot"></span> <span class="dot"></span> <span class="dot"></span> </div> </div> <div id="News" class="tabcontent"> <h3>News</h3> <button onclick="myFunction('Demo1')" class="w3-btn w3-block w3-black w3-left-align">Updates</button> <div id="Demo1" class="w3-container w3-hide w3-animate-zoom"> <h4>Section 1</h4> <p>Some text..</p> <hr> </div> <button onclick="myFunction('Demo2')" class="w3-btn w3-block w3-black w3-left-align">Announcements</button> <div id="Demo2" class="w3-container w3-hide w3-animate-zoom"> <h4>Section 2</h4> <p>Some text..</p> <hr> </div> <button onclick="myFunction('Demo3')" class="w3-btn w3-block w3-black w3-left-align">Blog</button> <div id="Demo3" class="w3-container w3-hide w3-animate-zoom"> <h4>Section 3</h4> <p>Some text..</p> <hr> </div> </div> <div id="Tokyo" class="tabcontent"> <h3>Tokyo</h3> <p>Tokyo is the capital of Japan.</p> </div> <script> var slideIndex = 0; showSlides(); function showSlides() { var i; var slides = document.getElementsByClassName("mySlides"); var dots = document.getElementsByClassName("dot"); for (i = 0; i < slides.length; i++) { slides[i].style.display = "none"; } slideIndex++; if (slideIndex> slides.length) {slideIndex = 1} for (i = 0; i < dots.length; i++) { dots[i].className = dots[i].className.replace(" active", ""); } slides[slideIndex-1].style.display = "block"; dots[slideIndex-1].className += " active"; setTimeout(showSlides, 10000); // Change image every 2 seconds } </script> <script> function myFunction(id) { var x = document.getElementById(id); if (x.className.indexOf("w3-show") == -1) { x.className += " w3-show"; } else { x.className = x.className.replace(" w3-show", ""); } } </script> <script> jQuery("#menu li a").click(function(){ var page_url = jQuery(this).attr("href") jQuery(".wide_main").html("<p>loading...</p>"); jQuery(".wide_main").load( page_url + ' #home'); }); </script> </body> </html> What I want to start off on when the html file is loaded, is the 'home' id.
  2. The famous Mandelbrot set: http://slicker.me/fractals/fractals.htm
  3. Hello programmers, Just have met with the above statement which comes with www.veldfiets.nl/whbe2b. I have changed somewhere a thing and mismanaged the smoothscroll in the above way. I cannot find the mistake. Has anybody a clue? It has been a long time ago that I wrestled with the matter and got it working.... Thanks a lot.
  4. Hello. Here is some excerpted code which already works well. ------------------------------------------------------------------------------------------------------- <script type="text/javascript"> function checkForm(form) { if(form.username.value == "") { ... // many more lines </script> <form action="return_to_calling_page.html" onsubmit="return checkForm(this);" id="logonForm" > <p>Username: <input type="email" name="username" autofocus></p> <p>Password: <input type="password" name="pwd1"></p> <p>Confirm Password: <input type="password" name="pwd2"></p> <p><br/> <input type="submit" value="submit"> <button type="button" onclick="javascript:location.href='about_page.html'">cancel</button> </p> </form> ... // many more lines ------------------------------------------------------------------------------------------------------- Then the JavaScript question: The checkForm(form) function only checks input data against invalid character types. But we additionally need to check the logon input values are in the company db. So I tried to write and call a modified function which included the checkForm(form) function. But the new modified javascript function verifyLogon() does not seem to run at all? Currently the following modified code is in use (which does not appear to call verifyLogon() successfully): ------------------------------------------------------------------------------------------------------- <form action="return_to_calling_page.html" onsubmit="return verifyLogon();" id="logonForm" > <script type="text/javascript"> function verifyLogon() { alert("Entered verifyLogon()"); // print something, regardless, but never (yet) seen checkForm(form) // checkForm(form) does not (yet) run from here if(checkForm()) { // if checkForm() returns true, do un/pw lookup in db <?PHP some_php_code1 ?> // run some php, sql find un in db if($stmt1 = true) { // if un query returns true, then... <?PHP some_php_code2 ?> // run some php, sql find pw in db if($stmt2 = true) { // if pw query returns true, then... <?PHP some_php_code3 ?> // run some php, sql view customer account db records }else{ alert("Password not found in company db."); } }else{ alert("Username was not found in company db."); } }else{ document.getElementById("logonForm").reset(); // clears the form form.username.focus(); // sets focus to username field return false // return to form } } </script> ------------------------------------------------------------------------------------------------------- Currently, I am not very concerned about the (if) control logic inside the verifyLogon() function. The plan is to fine tune the (if) logic later once the verifyLogon() is running. Mostly now just want to get the verifyLogon() running at all. Thank you.
  5. Dear all, Are JS tutorials of W3Schools written using the latest version of JS, known as ES6 (ECMAScript 6)?
  6. Hi all, Why do we hear and read that js is one of three programming languages a web programmer must learn besides html and css when there are also other widely used server-side languages, such as PHP? Is it because browsers are designed to mainly understand html, css, and js? If there are other reasons, kindly them spell out?
  7. Hi, I am creating a portfolio website. Here I want that the testimonials will scroll horizontally automatically and will pause on hover. Guys, please give me some hints on how can I perform this action. Here is the markup and style. <!DOCTYPE html> <html> <head> <style> body { margin: 0; padding: 0; } .testimonials-container::-webkit-scrollbar { display: none; .testimonials-wrapper { max-width: 100%; height: 450px; border: 1px solid lightgrey; background: linear-gradient(#000000, #777474); padding-left: 25px; padding-right: 25px; position: relative; } .testimonials-quote { width: 100%; text-align: center; padding-bottom: 20px; color: white; } .testimonials-container { width: 100%; height: 100%; text-align: center; display: flex; margin: 0; padding: 0; padding-bottom: 20px; overflow: scroll; } .testimonials-item { min-width: 230.99px; max-width: 230px; height: 70%; background-color: white; margin-right: 20px; margin-left: 20px; color: black; -webkit-transition: 0.5s ease-in-out; -moz-transition: 0.5s ease-in-out; -ms-transition: 0.5s ease-in-out; -o-transition: 0.5s ease-in-out; transition: 0.5s ease-in-out; } .testimonials-item:last-child { margin-right: 0; } .testimonials-item:first-child { margin-left: 0; } .testimonials-image { width: 124px; border-radius: 50%; padding-top: 20px; } .testimonials-image img { width: 150px; height: 150px; border-radius: 50%; margin-left: 30%; } .testimonials-prev, .testimonials-next { position: absolute; top: 50%; padding: 10px 5px; font-size: 25px; color: white; cursor: pointer; z-index: 5; } .testimonials-prev { left: 0; border-radius: 0 3px 3px 0; } .testimonials-next { right: 0; border-radius: 3px 0 0 3px; } .testimonials-prev:hover, .testimonials-next:hover { background-color: white; color: black; } </style> </head> <body> <div class= "testimonials-wrapper"> <div class= "testimonials-quote"> <h1>What Others Say About Us</h1> </div> <div class= "testimonials-container"> <div class= "testimonials-item"> <div class= "testimonials-image"> <img src= "images/for%20use/tiger.jpg"/> </div> <div class= "testimonialists-name"> <h3>Rahim</h3> </div> <div class= "testimonial">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam accumsan sed leo eget malesuada.</div> </div> <div class= "testimonials-item"> <div class= "testimonials-image"> <img src= "images/for%20use/tiger.jpg"/> </div> <div class= "testimonialists-name"> <h3>Karim</h3> </div> <div class= "testimonial">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam accumsan sed leo eget malesuada.</div> </div> <div class= "testimonials-item"> <div class= "testimonials-image"> <img src= "images/for%20use/tiger.jpg"/> </div> <div class= "testimonialists-name"> <h3>Abdullah</h3> </div> <div class= "testimonial">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam accumsan sed leo eget malesuada.</div> </div> <div class= "testimonials-item"> <div class= "testimonials-image"> <img src= "images/for%20use/tiger.jpg"/> </div> <div class= "testimonialists-name"> <h3>Yasir</h3> </div> <div class= "testimonial">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam accumsan sed leo eget malesuada.</div> </div> <div class= "testimonials-item"> <div class= "testimonials-image"> <img src= "images/for%20use/tiger.jpg"/> </div> <div class= "testimonialists-name"> <h3>Mahmudullah</h3> </div> <div class= "testimonial">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam accumsan sed leo eget malesuada.</div> </div> <div class= "testimonials-item"> <div class= "testimonials-image"> <img src= "images/for%20use/tiger.jpg"/> </div> <div class= "testimonialists-name"> <h3>Riad</h3> </div> <div class= "testimonial">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam accumsan sed leo eget malesuada.</div> </div> <div class= "testimonials-item"> <div class= "testimonials-image"> <img src= "images/for%20use/tiger.jpg"/> </div> <div class= "testimonialists-name"> <h3>Shohan</h3> </div> <div class= "testimonial">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam accumsan sed leo eget malesuada.</div> </div> <div class= "testimonials-item"> <div class= "testimonials-image"> <img src= "images/for%20use/tiger.jpg"/> </div> <div class= "testimonialists-name"> <h3>Shohan</h3> </div> <div class= "testimonial">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam accumsan sed leo eget malesuada.</div> </div> </div> <span class= "testimonials-prev">❰</span> <span class= "testimonials-next">❱</span> </div> <script src= "jquery-3.1.1.min.js"></script> <script> var x = 270; $(document).ready(function() { $(".testimonials-next").click(function() { $(".testimonials-container").scrollLeft(x += 270); }); $(".testimonials-prev").click(function() { $(".testimonials-container").scrollLeft(x -= 270); }); }); </script> </body> </html> Waiting for your great hints. Thank you in advance.
  8. Hi, here is a code. I want to make the .characteristics-quote to stay fixed when scrolling to the .characteristics-wrapper. But When the characteristics-wrapper class scrolling is finished the .characteristics-quote should be vanished. Can you please tell me how I can fix this ? Thank you in advance. <!DOCTYPE html> <html lang= "en-us"> <head> <meta charset= "utf-8"/> <title>About</title> <link rel= "stylesheet" type= "text/css" href= "font-awesome-4.7.0/css/font-awesome.min.css"/> <style type= "text/css"> body { margin: 0; padding: 0; color: white; background-color: black; overflow: auto; } .about { max-width: 100%; height: 200px; background-color: black; color: white; text-align: center; padding-left: 10%; padding-right: 10%; padding-top: 5px; margin: 0; } .characteristics-wrapper { max-width: 100%; padding: 10px; margin-bottom: 200px; border: 1px solid white; overflow: hidden; } .characteristics-quote { max-width: 40%; float: left; transform: translateX(-5%); position: fixed; color: white; } .characteristics-quote h1 { max-width: 70%; text-align: center; margin: auto; padding-top: 100px; } .characteristics-container { max-width: 60%; float: right; text-align: center; position: relative; } .characteristics-item-row1, .characteristics-item-row2 { max-width: 50%; } .characteristics-item-row1 { padding-top: 50px; } .characteristics-item-row2 { position: absolute; top:50px; right: 0; } .characteristics-item { max-width: 80%; display: block; margin: auto; margin-bottom: 20px; margin-top: 20px; } .characteristics-icon { font-size: 60px; padding: 15px; border: 1px solid lightgrey; border-radius: 50%; height: 76px; width: 76px; margin: auto; } .characteristics-item:hover .characteristics-icon{ background-color: white; color: black; -webkit-transition: 0.6s ease-in-out; -moz-transition: 0.6s ease-in-out; -ms-transition: 0.6s ease-in-out; -o-transition: 0.6s ease-in-out; transition: 0.6s ease-in-out; } /**Animations**/ .left { -webkit-animation-name: left; -webkit-animation-duration: 1s; -moz-animation-name: left; -moz-animation-duration: 1s; -ms-animation-name: left; -ms-animation-duration: 1s; -o-animation-name: left; -o-animation-duration: 1s; animation-name: left; animation-duration: 1s; } .right { -webkit-animation-name: right; -webkit-animation-duration: 3s; -moz-animation-name: right; -moz-animation-duration: 3s; -ms-animation-name: rightt; -ms-animation-duration: 3s; -o-animation-name: right; -o-animation-duration: 3s; animation-name: right; animation-duration: 3s; } .scale { -webkit-animation-name: scale; -webkit-animation-duration: 2s; -moz-animation-name: fade; -moz-animation-duration: 2s; -ms-animation-name: scale; -ms-animation-duration: 2s; -o-animation-name: scale; -o-animation-duration: 2s; animation-name: scale; animation-duration: 2s; } .fade { -webkit-animation-name: fade; -webkit-animation-duration: 2s; -moz-animation-name: fade; -moz-animation-duration: 2s; -ms-animation-name: fade; -ms-animation-duration: 2s; -o-animation-name: fade; -o-animation-duration: 2s; animation-name: fade; animation-duration: 2s; } /**Animating from the left**/ @-webkit-keyframes left { from {left: -500px;} to {left: 0;} } @-moz-keyframes left { from {left: -500px;} to {left: 0;} } @-ms-keyframes left { from {left: -500px;} to {left: 0;} } @-o-keyframes left { from {left: -500px;} to {left: 0;} } @keyframes left { from {left: -500px;} to {left: 0;} } /**Animating from the right**/ @-webkit-keyframes right { from {right: -500px;} to {right: 0;} } @-moz-keyframes right { from {right: -500px;} to {right: 0;} } @-ms-keyframes right { from {right: -500px;} to {right: 0;} } @-o-keyframes right { from {right: -500px;} to {right: 0;} } @keyframes right { from {right: -500px;} to {right: 0;} } /**Animating scale**/ @-webkit-keyframes scale { from {transform: scale(3);} to {transform: scale(1);} }@-moz-keyframes scale { from {transform: scale(3);} to {transform: scale(1);} }@-ms-keyframes scale { from {transform: scale(3);} to {transform: scale(1);} }@-o-keyframes scale { from {transform: scale(3);} to {transform: scale(1);} } @keyframes scale { from {transform: scale(3);} to {transform: scale(1);} } /**Fading animation**/ @-webkit-keyframes fade { from {opacity: 0;} to {opacity: 1;} } @-moz-keyframes fade { from {opacity: 0;} to {opacity: 1;} } @-ms-keyframes fade { from {opacity: 0;} to {opacity: 1;} } @-o-keyframes fade { from {opacity: 0;} to {opacity: 1;} } @keyframes fade { from {opacity: 0;} to {opacity: 1;} } </style> </head> <body> <div class= "about"> <h1>Who we are?</h1> <div class= "about-content">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam accumsan sed leo eget malesuada. Integer dapibus nisi id eros scelerisque accumsan. Pellentesque commodo, enim nec faucibus tristique, risus nibh ullamcorper velit, sed egestas urna erat sit amet justo.</div> </div> <div class= "characteristics-wrapper"> <div class= "characteristics-quote"> <h1>Main characteristics of our services</h1> </div> <div class= "characteristics-container"> <div class= "characteristics-item-row1"> <div class= "characteristics-item"> <div class= "characteristics-icon"><i class="fa fa-pagelines" aria-hidden="true"></i></div> <div class= "characteristics-title">Innovative</div> <div class= "characteristics-description">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam accumsan sed leo eget malesuada. Integer dapibus nisi id eros scelerisque accumsan.</div> </div> <div class= "characteristics-item"> <div class= "characteristics-icon"><i class="fa fa-cogs" aria-hidden="true"></i></div> <div class= "characteristics-title">Great Features</div> <div class= "characteristics-description">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam accumsan sed leo eget malesuada. Integer dapibus nisi id eros scelerisque accumsan.</div> </div> <div class= "characteristics-item"> <div class= "characteristics-icon"><i class="fa fa-modx" aria-hidden="true"></i></div> <div class= "characteristics-title">Unique Design</div> <div class= "characteristics-description">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam accumsan sed leo eget malesuada. Integer dapibus nisi id eros scelerisque accumsan.</div> </div> <div class= "characteristics-item"> <div class= "characteristics-icon"><i class="fa fa-graduation-cap" aria-hidden="true"></i></div> <div class= "characteristics-title">Well Documented</div> <div class= "characteristics-description">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam accumsan sed leo eget malesuada. Integer dapibus nisi id eros scelerisque accumsan.</div> </div> </div> <div class= "characteristics-item-row2"> <div class= "characteristics-item"> <div class= "characteristics-icon"><i class="fa fa-pagelines" aria-hidden="true"></i></div> <div class= "characteristics-title">Innovative</div> <div class= "characteristics-description">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam accumsan sed leo eget malesuada. Integer dapibus nisi id eros scelerisque accumsan.</div> </div> <div class= "characteristics-item"> <div class= "characteristics-icon"><i class="fa fa-cogs" aria-hidden="true"></i></div> <div class= "characteristics-title">Great Features</div> <div class= "characteristics-description">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam accumsan sed leo eget malesuada. Integer dapibus nisi id eros scelerisque accumsan.</div> </div> <div class= "characteristics-item item2"> <div class= "characteristics-icon"><i class="fa fa-modx" aria-hidden="true"></i></div> <div class= "characteristics-title">Unique Design</div> <div class= "characteristics-description">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam accumsan sed leo eget malesuada. Integer dapibus nisi id eros scelerisque accumsan.</div> </div> <div class= "characteristics-item"> <div class= "characteristics-icon"><i class="fa fa-graduation-cap" aria-hidden="true"></i></div> <div class= "characteristics-title">Well Documented</div> <div class= "characteristics-description">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam accumsan sed leo eget malesuada. Integer dapibus nisi id eros scelerisque accumsan.</div> </div> </div> </div> </div> <div style= "height: 700px"></div> </body> </html>
  9. Hi, I want to change the background image automatically every 5 second and the indicators should be green. I followed w3schools slideshow tutorial and created this slideshow. But it doesn't seem to work as expectation. Please tell me where I made the mistake. thank you in advance. <!DOCTYPE html> <html> <head> <style> body { margin: 0; padding: 0; } .header-slideshow-container { width: 100%; margin: 0; padding: 0; } .header-slide { display: block; width: 100%; height: 100%; margin: 0; padding: 0; } #header-slide1 { background-image: url("http://www.w3schools.com/howto/img_nature_wide.jpg"); background-repeat: no-repeat; background-attachment: fixed; background-size: 100% 100%; } #header-slide2 { background-image: url("http://www.w3schools.com/howto/img_fjords_wide.jpg"); background-repeat: no-repeat; background-attachment: fixed; background-size: 100% 100%; } #header-slide3 { background-image: url("http://www.w3schools.com/howto/img_mountains_wide.jpg"); background-repeat: no-repeat; background-attachment: fixed; background-size: 100% 100%; } .current-header-slides-container { position: absolute; top: 45%; right: 25px; margin-top: -30px; } .current-header-slide-indicator { width: 15px; height: 15px; border-radius: 50%; margin-bottom: 5px; background-color: black; } </style> </head> <body> <div class= "header-slideshow-container"> <div class= "header-slide" id= "header-slide1"></div> <div class= "header-slide" id= "header-slide2"></div> <div class= "header-slide" id= "header-slide3"></div> <div class= "current-header-slides-container"> <div class= "current-header-slide-indicator"></div> <div class= "current-header-slide-indicator"></div> <div class= "current-header-slide-indicator"></div> </div> </div> <script> var h = window.innerHeight; (function () { 'use strict'; document.getElementsByClassName("header-slideshow-container")[0].style.height = h + 'px'; }()); var headerSlideIndex = 0; headerSlideshow(); function headerSlideshow() { 'use strict'; var i, headerSlides = document.getElementsByClassName("header-slide"), dots = document.getElementsByClassName("current-header-slide-indicator"); for (i = 0; i < headerSlides.length; i++) { headerSlides[i].style.display = "none"; } headerSlideIndex++; if (headerSlideIndex >= headerSlides.length) { headerSlideIndex = 1; } for (i = 0; i < dots.length; i++) { dots[i].style.backgroundColor = "black"; } headerSlides[i-1].style.display = "block"; dots[i-1].style.backgroundColor = "green"; setTimeout(headerSlideshow, 5000); } </script> </body> </html>
  10. Having NULL type as an object to be a bug in js, is there any harm to code this could result in, and what precautions should we take to avoid such harm?
  11. <body> hello all <script> document.write(5+7); document.write(4); </script> </body> Above basic js code outputs: hello all 124 There is no concatenation between "hello all" and "12", yet space is there. I'd appreciate an explanation.
  12. Hi,I am developing my first website template. When I used this script in the internal script, it ran well. But when I added this script inside a file,the jsLint showed that there was almost 20 errors. Here I am sending the screen of the errors. Can you please help me to understand why these errors occurred and how can I resolve these? Here is the script: function openModalSearch() { 'use strict'; var modalSearch = document.getElementById("modal-search-container"); modalSearch.style.height = "100%"; } function closeModalSearch() { 'use strict'; document.getElementById("modal-search-container").style.height = "0%"; } function hideSearch() { 'use strict'; document.getElementById("search-container").style.visibility = "hidden"; } function showSearch(){ 'use strict' document.getElementById("search-container").style.visibility = "visible"; } Thank you in advance......
  13. Hi, I am facing problem to undestand the showSlides() function . Can you please explain this function to me . var slideIndex = 1; showSlides(slideIndex); function plusSlides(n) { showSlides(slideIndex += n); } function currentSlide(n) { showSlides(slideIndex = n); } function showSlides(n) { var i; var slides = document.getElementsByClassName("mySlides"); var dots = document.getElementsByClassName("dot"); if (n > slides.length) {slideIndex = 1} if (n < 1) {slideIndex = slides.length} for (i = 0; i < slides.length; i++) { slides[i].style.display = "none"; } for (i = 0; i < dots.length; i++) { dots[i].className = dots[i].className.replace(" active", ""); } slides[slideIndex-1].style.display = "block"; dots[slideIndex-1].className += " active"; }
  14. Hi everybody http://www.w3schools.com/js/js_array_sort.asp If I'm right, the JS-Tutorial about sorting arrays randomly has a lack. The order of the array is kind of in a random order at the first glance, but the elements often stay at the same place as they were. This is true in the most for the element at the end of the array and the effect happens in most browsers, but not in all of them. I've written a script to test this. In these browsers the elements are not evenly distributed as they should: Chrome, IE, Edge, Opera. In Safari they were evenly distributed when I tried it. Try it yourself. <!DOCTYPE html> <html> <body> <p id="demo"></p> <script> var sum; var points; var i, j; sum = [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]; for (i=0;i<1000;i++){ points = [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1]; points.sort(function(a, {return 0.5 - Math.random()}); for (j=0;j<points.length;j++){ sum[j]+=points[j]; } } document.getElementById("demo").innerHTML = sum; </script> </body> </html> What the code does: It creates an array with a leading 1 and a 1 at the last place and zeroes between (points). Then it sorts this array randomly and adds the resulting array to a sum array. Then it starts again with the specific array. The generating, sorting and adding is done a 1000 times. When you reload the page the summed up numbers are displayed. Result: In many browsers the last number is higher than the others, which shouldn't happen with correct random sorting. Cheers, celus
  15. Hi, I am a beginner web designer and developer. Now I am learning javascript. But while learning I didn't understand the bitwise operators and how they works. In the below image how X converts to decimal? Please help as many experienced and professional web developers are present here. Thank you.
  16. Hi all, I would like to understand how JS/jQuery can interact with PHP to upload a status and a picture from the HTML5 canvas to Twitter. I set up a similar thing for FB and it works. I don't get how to do it for Twitter and I haven't found much about it. Could you explain to me how it works? I currently have this JS/jQuery code as a starting point: var formData = new FormData(), mimetype = canvas.toDataURL().substring(canvas.toDataURL().lastIndexOf(":") + 1, canvas.toDataURL().lastIndexOf(";")), blob = dataURItoBlob(canvas.toDataURL().split(',')[1], mimetype); formData.append('source', blob); $('#twitter').click( function() { $.ajax({ url: '', type: 'POST', data: formData, processData: false, contentType: false, cache: false, success: function() { $('#twitter').addClass('twitter-success'); setTimeout( function() { $('#twitter').removeClass('twitter-success'); }, 3000); } }); } ); Thank you!
  17. I don't seem to get my head around the reason why the following returns TypeError: Object.values is not a function var input = '[a docs/my_pdf.pdf|here§my_class#my_id][img imgs/myimg.jpg|Alt title][g Artificial Languages][lang]HTML, CSS, Sass, SMACSS, SVG[y]7[/y][/lang][/g][p]Yes[/p]'; var RegEx = { 'tagClass': { '\§\s*(.+?)\s*[\§\|\]\#]': ' class="$1"' }, 'tagId': { '\#\s*(.+?)\s*[\§\|\]\#]': ' id="$1"' }, 'tagAlt': { '\[img.+?\|\s*(.+?)\s*[\§\|\]\#]': ' alt="$1"' }, 'tagTitle': { '\[a.+?\|\s*(.+?)\s*[\§\|\]\#]': ' title="$1"' }, 'tagSrc': { '\[img\s*(.+?)\s*[\§\|\]\#]': ' src="$1"' }, 'tagHref': { '\[a\s*(.+?)\s*[\§\|\]\#]': ' href="$1"' }, 'tagAngleBrackets': { '\[(\/?)(.+?(?=[\]]))\]?': '<$1$2>' } }; for (var tag in RegEx) { input.replace(new RegExp(Object.keys(RegEx[tag])[0], 'g'), Object.values(RegEx[tag])[0]); }
  18. Hi everybody. First at all, I specify I'm French and I'm sorry if my English isn't perfect. I've chosen this forum because I didn't find a solution with many French forums. A friend has advised to me this forum to expose my problem. I would like to add an animation to my html page by using JS. Let me explain ; for the time being, there's only one picture <img> on my page, it's a candle image. I would like to add an animation by using JS (or something else it doesn't matter) giving the impression of being near to the flame, if you know what I mean. I don't want to see the flame's move or to modify the picture, but just a light effect by using luminosity. I'm not a very high level in JS, and I don't know if I should use randomly variables and change luminosity or something else. If you could show me an example I would be grateful (: Thanks in advance, -Flo
  19. Hello, while reading the tutorial about js i found this paragraph: According to Stack Overflow fullName is not a function, because the result depends on the state of the object and is not always the same. Maybe you need to correct this or be more precise with your definition of a function.
  20. Hi, As you know, there is W3C markup validation service. Is there a reliable validation service for PHP, MySQL, JS (other than Chrome's console), and CSS?
  21. Hi, For all pages, there is a language link in the header that is created with the help of a jQuery link. For only one page, however, there is another jQuery link (besides the first jQuery) to make a text collapsible/uncollapsible. I placed both links along with their associated js files before the closing body tag. All pages are fine, except the one having the two jQuery links--it has resulted in the disappearance of a text of another anchor link in the header not related to any function of the jQueries. It seems that the jQuery affecting the language link (anchor) is also affecting the other anchor of the header. How to make the second jQuery link not affect the other anchor link? Links are listed below. <script type= "text/javascript" src="http://code.jquery.com/jquery-2.1.4.min.js"></script> <script type= "text/javascript" src= "./js/collabsible.js"></script> <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.5.0/jquery.min.js"></script> <script src="js/languageswitcher.js"></script>
  22. <php at the top of page> <followed by an html tags, then by below php> <?php include ('./includes/footer.html'); ?> <script type= "text/javascript" src="http://code.jquery.com/jquery-2.1.4.min.js"></script> <script type= "text/javascript" src= "./js/collabsible.js"></script> For one odd page of the website I wanted to have collapsible/uncollapsible text using jQuery, so I placed the relevant scripts at the bottom of the page as seen above. It works. But in a previous communication it was stated that the ideal place for inclusion of js/jQuery scripts is before the closing tag of the body. The footer file, included before the scripts, closes the body and html tags, which means the scripts are placed even after the closed html. If scripts are placed before inclosure of the footer file, it would then be before some html tags. I cannot place them in the footer file before closure of the body tag because I need scripts in this page only while footer is also in the rest of site pages. It seems I have only two options: leaving them as seen above or make one additional footer page for this page only where I can place the scripts before body closure tag. Any help or guidance will be appreciated.
  23. Dear all: I have just started learning js and jQuery. I am confused about browser support to js. On one hand, there seems to be a general agreement that js is the most popular language for website design. On the other hand, It's stated that js is not equally supported by browsers, especially old browsers, and that some user browsers might even turn down js. jQuery is a better alternative for browser support. Is this true about problems in js' browser support? And if it is, how could a language with such a draw back become the most popular?
  24. Dear all: I know it is not usually normal to make double links of any file, however, since jQuery library can be linked to the page via the internet or locally, can we do both linking to achieve guaranteed loading if one fails and to make sure that getting the first link of the two would mean a faster loading? Is there any harm of doing so?
  25. In a js tutorial of w3schools it is mentioned that calling a js file is done either in the head or body; if in the body, it is preferable to be at the bottom to avoid slowing down page loading should the js loading is slow. Since the browser reads the page from top to bottom, it will hit the head first. Does that mean calling a js file at the bottom of the body is better than calling it in the head?