center

问题 This question already has answers here : Align the form to the center in Bootstrap 4 (3 answers) Closed last year . HTML <div class="container-fluid background"> <div class="row"> <!-- background effect --> <div id="particles-js"> <div class="login col-12"> <form class="login-form" method="post" action=""> <div class="form-group col"> <h2 class="login-header">Login</h2> </div> <div class="col form-group"> <input type="text" name="username" placeholder="Username" class="username-input"> </div>

问题 I'm trying to get the following code to work but it doesn't: $.each($("input, select"), function (index, input) { input.addEventListener("invalid", function () { this.scrollIntoView({ behavior: 'smooth', block: 'center' }); }); }); What this says is: for each input and select in my form, add an event listener that listens for the "invalid" state (fired upon submitting the form if any of the inputs or selects are invalid). The event listener will scroll the input or select into view at the

问题 body{ width:auto; color:white; font-size:15px; width:100%; max-width:1980px; min-width:334px; margin:0px auto; } This is my code. I need thumbnails to be in the center for all screen resolutions. But I can't do it. I even tried tag. It didn't work either. What should I do? 回答1: see this url : http://jsfiddle.net/DyRS4/2/ html: <div id="my-div">my div</div> css: div#my-div{ margin:0px auto; background: red; width: 100px; height: 100px; } 回答2: CSS .picture_area { width:/*width of picture area

问题 Right, so, I've been self-editing a rather complicated site and have been stuck on this last part involving the menu. It has a float:left command (the navbar displays alined to the left of the screen) and I've been trying to get it to text-align:center (appear centered within the screen) with a wrapper but have been unsuccessful. Below is the coding: #nav a { display: block; padding: 5px; color: #aaa; text-decoration: none; outline: none; font-weight: normal; font-family: "Droid Serif",

问题 I can't center vertically popup_interstitial_table that contains an ads type container. The fiddle it is autoexplained: http://jsfiddle.net/NomikOS/D8LLM/ jQuery solutions are welcome too. HTML: <div id="popup_interstitial"> <div id="parent"> <div id="popup_interstitial_pro_head_text"> Headline text </div> <div id="child"> <div id="popup_interstitial_table"> <div id="popup_interstitial_row2"> <div id="popup_interstitial_title"><?php echo $title; ?></div> <img id="popup_interstitial_image" src

问题 I am trying to figure out how to center images located within their own , center them within the container. I have 8 images in 2 columns, 2 images per row left aligned. I need them centered aligned. I found a way to center here: Aligning multiple images horizontally in the center of a div Floating a block level item will push it to the left or right. "display:inline-block" on the IMG. And remove the float and position statements. Then "text-align:center" for the container div. But that way

问题 I have a Game Center app. I successfully connect two clients and can send messages etc. I am now trying to add a 3rd/4th client with [GKMatchmaker addPlayersToMatch] like so... - (void) findAdditionalPlayer { GKMatchRequest *request = [[[GKMatchRequest alloc] init] autorelease]; request.minPlayers = 2; // minPlayers = 3 doesn't work either request.maxPlayers = 4; [[GKMatchmaker sharedMatchmaker] addPlayersToMatch:match matchRequest:request completionHandler:^(NSError *error) { if (error) { //

问题 I'm writing a small web page for a class assignment. I want to keep the text inside a column and in between paragraphs I'm planning on placing images. How do I keep the images inside the column without specifically changing their dimensions? CSS body { background-image:url("Some Image"); background-size:cover; background-repeat:none; } .body-box { display:block; margin-left:33%; margin-right:33%; padding-left:3%; padding-right:3%; border-left:4px solid black; border-right:4px solid black;

问题 I was custom the UIAlertView , I need add some component to the alertView (like label, tableview). But I have a question. I need to know the alertView's width. I try to add self.frame.size.width , but I just got the 0.000000 . How can I get the alertView's width? I will calculate to put the subview at, and put the UILabel to subview to center. My partial code below: .h file: #import <UIKit/UIKit.h> @interface CustomTableViewAlert : UIAlertView -(instancetype)initWithTitle:(NSString *)title

问题 I'm trying to center my main container, but whatever I do it still floats left... The reason I am placing all of my content in a own Div, is that i use a Jquery cycle background, and I want to separate my content from my background. But as mentioned I really cant make my Div container center... I hope someone a bit more skilled than me can figure this out! This is my html: <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Forside</title> <link rel="stylesheet" type="text/css" media=