带边框的方形div.只显示角落 [英] Square div with border. Only show the corners
问题描述
我有一个在网站上使用的播放器.
我想更改播放按钮的外观.
I have a player that I use on my website.
I want to change the appearance of the play button.
我当时想用虚线边框来做到这一点，然后增加虚线之间的间距.那没用.
I was thinking to do this with a dashed border and then increase the space between the dashes. That didn't work.
我无法使用图片.是否有 CSS(3)解决方案?
I can't use an image. Is there a CSS(3) solution?
我希望它看起来像这样.
I want it to look something like this.
这真的是所有角落！
-------------更新----------------
------------- UPDATE ----------------
所以我使用@Naila的解决方案使其工作.遇到以下问题:
So I used the solution of @Naila to make it work. Run against the following problem:
我将 Video.js 插件用于 WordPress ，并且正在创建新皮肤
I use Video.jsplugin for WordPress and I'm creating a new skin
当我跟随 css 时，我发现已经有一个 :: before -pseudo可以处理播放箭头.
As I was following the css I found that there already was a ::before-pseudo that handles the play arrow.
箭头的 :: before -pseudo表示宽度为100％，这有助于箭头位于中心.当我使用30％的宽度使边框成为一个角时.这将覆盖之前的100％宽度.结果如下:
The ::before-pseudo of the arrow states a width of 100% which helps the arrow to be in the center.
As I use the width of 30% to make the border be a corner. This overwrites the earlier width of a 100%. Resulting in the following:
这里是:
CodePen
如果您刚刚在CSS字段中跳过了此CSS，您将得到我现在所在的位置并看到问题:
If you just past this CSS in the CSS-field you will get where I'm now and see the problem:
/*
Player Skin Designer for Video.js
http://videojs.com
To customize the player skin edit
the CSS below. Click "details"
below to add comments or questions.
This file uses some SCSS. Learn more
at http://sass-lang.com/guide)
This designer can be linked to at:
http://codepen.io/heff/pen/EarCt/left/?editors=010
*/
// The following are SCSS variables to automate some of the values.
// But don't feel limited by them. Change/replace whatever you want.
// The color of icons, text, and the big play button border.
// Try changing to #0f0
$primary-foreground-color: #fff; // #fff default
// The default color of control backgrounds is mostly black but with a little
// bit of blue so it can still be seen on all-black video frames, which are c ommon.
// Try changing to #900
$primary-background-color: #2B333F; // #2B333F default
// Try changing to true
$center-big-play-button: true; // true default
.video-js {
/* The base font size controls the size of everything, not just text.
All dimensions use em-based sizes so that the scale along with the font size.
Try increasing it to 15px and see what happens. */
font-size: 10px;
/* The main font color changes the ICON COLORS as well as the text */
color: $primary-foreground-color;
}
/* The "Big Play Button" is the play button that shows before the video plays.
To center it set the align values to center and middle. The typical location
of the button is the center, but there is trend towards moving it to a corner
where it gets out of the way of valuable content in the poster image.*/
.vjs-default-skin .vjs-big-play-button {
/* The font size is what makes the big play button...big.
All width/height values use ems, which are a multiple of the font size.
If the .video-js font-size is 10px, then 3em equals 30px.*/
font-size: 3em;
/* We're using SCSS vars here because the values are used in multiple places.
Now that font size is set, the following em values will be a multiple of the
new font size. If the font-size is 3em (30px), then setting any of
the following values to 3em would equal 30px. 3 * font-size. */
$big-play-width: 3em;
/* 1.5em = 45px default */
$big-play-height: 3em;
line-height: $big-play-height;
height: $big-play-height;
width: $big-play-width;
/* 0.06666em = 2px default */
/* 0.3em = 9px default */
border:none;
border-radius:0;
@if $center-big-play-button {
/* Align center */
left: 50%;
top: 50%;
margin-left: -($big-play-width / 2);
margin-top: -($big-play-height / 2);
} @else {
/* Align top left. 0.5em = 15px default */
left: 0.5em;
top: 0.5em;
}
}
.vjs-big-play-button:before {
position: absolute;
content: "";
width: 30px !important;
height: 30px!important;
right: -2px;
bottom: -2px;
border-left: 2px solid $primary-foreground-color;
border-top: 2px solid $primary-foreground-color;
}
.vjs-big-play-button:after {
position: absolute;
content: "";
width: 30px;
height: 30px;
right: -2px;
bottom: -2px;
border-right: 2px solid $primary-foreground-color;
border-bottom: 2px solid $primary-foreground-color;
}
/* The default color of control backgrounds is mostly black but with a little
bit of blue so it can still be seen on all-black video frames, which are common. */
.video-js .vjs-control-bar,
.video-js .vjs-big-play-button,
.video-js .vjs-menu-button .vjs-menu-content {
/* IE8 - has no alpha support */
background-color: $primary-background-color;
/* Opacity: 1.0 = 100%, 0.0 = 0% */
background-color: rgba($primary-background-color, 0.7);
}
// Make a slightly lighter version of the main background
// for the slider background.
$slider-bg-color: lighten($primary-background-color, 33%);
/* Slider - used for Volume bar and Progress bar */
.video-js .vjs-slider {
background-color: $slider-bg-color;
background-color: rgba($slider-bg-color, 0.5);
}
/* The slider bar color is used for the progress bar and the volume bar
(the first two can be removed after a fix that's coming) */
.video-js .vjs-volume-level,
.video-js .vjs-play-progress,
.video-js .vjs-slider-bar {
background: $primary-foreground-color;
}
/* The main progress bar also has a bar that shows how much has been loaded. */
.video-js .vjs-load-progress {
/* For IE8 we'll lighten the color */
background: lighten($slider-bg-color, 25%);
/* Otherwise we'll rely on stacked opacities */
background: rgba($slider-bg-color, 0.5);
}
/* The load progress bar also has internal divs that represent
smaller disconnected loaded time ranges */
.video-js .vjs-load-progress div {
/* For IE8 we'll lighten the color */
background: lighten($slider-bg-color, 50%);
/* Otherwise we'll rely on stacked opacities */
background: rgba($slider-bg-color, 0.75);
}
推荐答案
我们可以使用 pseudo 元素执行此操作，请检查演示
we can do this with pseudo elements , check the demo
.box {
width: 200px;
height: 200px;
margin: 15px auto;
background: #999;
position: relative;
}
.box:before {
position: absolute;
content: "";
width: 30px;
height: 30px;
top: -2px;
left: -2px;
z-index:-1;
border-left: 2px solid red;
border-top: 2px solid red;
}
.box:after {
position: absolute;
content: "";
width: 30px;
height: 30px;
right: -2px;
bottom: -2px;
z-index:-1;
border-right: 2px solid red;
border-bottom: 2px solid red;
}<div class="box"></div>这篇关于带边框的方形div.只显示角落的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
