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WoHe

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About WoHe

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    Male
  • Location
    Europe

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  • Languages
    HTML, CSS, JavaScript, jQuery, PHP, SQL, Java, Python
  1. help with speed problem (lagging)

    No, but I have tried commenting everything out so it was the same and I saw no difference..
  2. help with speed problem (lagging)

    No indeed, when I made the jsfiddle I expected it to lag, but it doesn't, it only lags in my browser via my localhost. (same browser as where I open the fiddle)
  3. help with speed problem (lagging)

    Thanks, but it (indeed) doesn't give any visible changes to the lags. I have also commented almost all my other code out to check if that causes the problem, but nothing... I'm testing my site with a localhost (using MAMP), do you know if this can be the problem?
  4. I have created some js file to change the height of my header when a user scrolls through it. The goal is that the header starts at 90% of the window height (90vh in css) when the page is loaded and it shrinks down to 80px when a user starts scrolling down (if the user goes back to the top of the page it will again grow to 90%). Also I want a gif playing in the back behind the header. The code works, but when you scroll down/up it seems to be lagging, but I would like it to fluently do these actions. Can anyone can give me some hints on how to improve the speed? Here is my code for these actions: HTML <html> <body> <div id="header-back" class="col12"></div> <div id="header" class="col12"></div> <div id="main" class="col12"></div> </body> </html> CSS /****** GRID VIEW ******/ [class*="col"] { width: 100%; } @media only screen and (min-width: 850px) { .col1 {width: 8.33%;} .col2 {width: 16.67%;} .col3 {width: 25.00%;} .col4 {width: 33.33%;} .col5 {width: 41.67%;} .col6 {width: 50.00%;} .col7 {width: 58.33%;} .col8 {width: 66.67%;} .col9 {width: 75.00%;} .col10 {width: 83.33%;} .col11 {width: 91.67%;} .col12 {width: 100.00%;} .col {width: auto;} } * { font-family: Trebuchet MS; border: 0px solid black; box-sizing: border-box; } body { width: 100vw; min-height: 100vh; margin: 0; } /* HEADER */ #header { height: 90vh; min-height: 80px; max-height: 90vh; background-color: rgba(30,30,30,0.8); position: fixed; top: 0; left: 0; box-shadow: 0 0 15px rgb(0,0,0); z-index: 2; } #header-back { height: 90vh; min-height: 80px; max-height: 90vh; position: fixed; top: 0; left: 0; z-index: 1; background-image: url("https://media.giphy.com/media/wyBcwFyH2FpO8/giphy.gif"); background-position: bottom left; background-size: cover; } /* MAIN */ #main { min-height: 100vh; padding-top: 90vh; background-color: rgb(230,230,230); } Javascript // change header size on scroll $(document).ready(function(){ // variables var vh90 = $(window).height()*(9/10); var height, color, opacity; // control height of header on scroll $(window).scroll(function(){ height = vh90 - $(window).scrollTop(); opacity = 1 - ( (height-80) / vh90 ) * 0.2; color = "rgba(30,30,30," + opacity + ")"; $("#header").css({"height": height, "background-color": color}); $("#header-back").css({"height": height}); }); }); I have created a jsfiddle to show my idea, but in the fiddle it seems to be working fluently (I used another gif, but I don't think this is the problem because this gif gets loaded at the start and doesn't really go away?)
  5. Grid view does not work

    Oh thanks a lot! I keep making this mistake everywhere...
  6. Grid view does not work

    So the grid view that is explained here does not work in my own document. This is the code I'm using: /*GRID VIEW*/ [class*="col"] { width: 100%; } @media only screen and (min-width: 720px) { .col1 {width: 8,33%;} .col2 {width: 16,67%;} .col3 {width: 25,00%;} .col4 {width: 33,33%;} .col5 {width: 41,67%:} .col6 {width: 50,00%;} .col7 {width: 58,33%;} .col8 {width: 66,67%;} .col9 {width: 75,00%;} .col10 {width: 83,33%;} .col11 {width: 91,67%;} .col12 {width: 100,00%;} } /*LAYOUT*/ * { font-family: sans-serif; border: 0.1px solid black; } body { width: 100vw; height: 100vh; overflow-y: scroll; margin: 0; } div { height: 100px; background-color: red; } <head> <link rel="stylesheet" type="text/css" href="style.css" /> </head> <body> <div class="col3"></div> </body> Does anyone see what's wrong? The div has always a width of 100% in my browser (safari)... Thanks!
  7. So my question is: how can I insert variables into my mysql queries in php? This is my code now, I would like to use the $me and the $friend variables to work in the sql query: function newChat($me, $friend) { global $conn; $sql = "SELECT id FROM chats WHERE (person1 = $me AND person2 = $friend) OR (person1 = $friend AND person2 = $me);"; mysqli_query($conn, $sql) or die('Error querying database.'); echo "check <br />"; $result = mysqli_query($conn, $sql); $row = mysqli_fetch_array($result); while ($row = mysqli_fetch_array($result)) { echo $row['id'] . ' - ' . $row['person1'] . ' - ' . $row['person2'] . ' - ' . $row['date'] .'<br />'; } } newChat('John', 'Marie'); Also if I set $sql to "SELECT * FROM chats" it only gives me one row of my two test rowes in my database. (it only gives the second row, and just ignores the first one? --> a screenshot of the database is at the end of this post) Can anyone please help me with this? Thanks already!
  8. I was wondering if there is any way to set unique values to each cookie. I want to use these cookies on my website to see if the visitor has already visited my website once, but without asking any information from them. This way I want to store this unique value in my database each time someone opens my website, and I will be able to see if there have been - for example - 20 different visitors in the past month, or if the same person has visited my website 20 times. All my code is already written and working, I only need a way to set a different unique value to each cookie I set.
  9. setcookie() in function doesn't work

    Ok, thanks a lot!
  10. setcookie() in function doesn't work

    So I have rebuild the code piece by piece and I have found the problem. The problem was in this piece of the code: echo "no cookie found <br />"; I don't know why this would cause a problem, but I don't need it anyway for the actual code, it was just to check if my code works (ironically). I'm still learning php so if you could figure out how this causes a problem, could you please explain it to me? Thanks already!
  11. Problem in aligning picture with text in logo

    You could maybe try to float:right the image. I'm also new , but I had a similar problem and it worked when I used this float:right.
  12. setcookie() in function doesn't work

    I had to set the domain to "localhost" to let the code work, I have now also set an expire date. The only remaining problem is that setcookie($cookiename, $cookievalue, time() + (86400 * 30), "/", "localhost"); doesn't work in an if-statement (as mentioned earlier), it does work outside and inside of any function, but not inside of the if-else statement... For example: This works: setcookie($cookiename, $cookievalue, time() + (86400 * 30), "/", "localhost"); This works: function set($cookiename, $cookievalue) { setcookie($cookiename, $cookievalue, time() + (86400 * 30), "/", "localhost"); } set($cookiename, $cookievalue); But this doesn't work: if(!isset($_COOKIE[$cookiename])) { echo "no cookie found <br />"; setcookie($cookiename, $cookievalue, time() + (86400 * 30), "/", "localhost"); }
  13. Your typed "right:0ox" instead of "right:0px", maybe this causes the problem, also I don't think the "right:0px" is necessary, by using the following code it should be on the bottom of the page and take up all the available width: <div style="bottom: 0px; left: 0px; position: absolute; width 100%; background-color:red;"> Status bar <div></div> </div> Also you used "background:red" instead of "background-color:red".
  14. Could you tell me more specific what you want to do? As I see it, you've got in input field with type=text and you want to copy the text from this input field into another element. I should do this with javascript: var text = document.getElementById("[id of the input field]").value; document.getElementById("[id of the other element]").innerHTML = text;
  15. setcookie() in function doesn't work

    And what do I need to set the $expires parameter if I don't want it to expire? Also, I don't think localhost is be the issue, because in all the other cases it does work, except for the case where it is set in the if-statement... PS: I've set the expire parameter to time() + (86400 * 30) and it still doesn't work...
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