CSS Background Image in :After Element

CSS background image in :after element

A couple things

(a) you cant have both background-color and background, background will always win. in the example below, i combined them through shorthand, but this will produce the color only as a fallback method when the image does not show.

(b) no-scroll does not work, i don't believe it is a valid property of a background-image. try something like fixed:

.button:after {
    content: "";
    width: 30px;
    height: 30px;
    background:red url("http://www.gentleface.com/i/free_toolbar_icons_16x16_black.png") no-repeat -30px -50px fixed;
    top: 10px;
    right: 5px;
    position: absolute;
    display: inline-block;
}

I updated your jsFiddle to this and it showed the image.

Background image with pseudo-element in CSS

As Mihai T pointed out, the issue is with width. I simply removed width from the first container and it solved the problem.

FINAL SOLUTION

.container {
  color: white;
  height: 80vh;
  margin: 10vh 0 0 25vw;
  position: relative;
}

.container::after {
  content: "";
  background: url('https://i.ibb.co/ngx7VSR/photo-2021-04-19-21-24-36.jpg');
  background-position: center;
  background-size: cover;
  filter: brightness(.5);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

.container_inside {
  align-items: center;
  display: flex;
  flex-direction: column;
  font-size: 1.5em;
  height: calc(100% - 4em);
  justify-content: center;
  padding: 2em;
  text-align: center;
  width: calc(100% - 4em);
}

.small {
  color: #e9e9e9;
  font-size: .7em;
}

<div class="container">
  <div class="container_inside">
    <p>Any fool can write code that a computer can understand. Good programmers write code that humans can understand.</p>
    <p class="small">Martin Fowler</p>
  </div>
</div>

Pseudo-element background image doesn't appear

There were two things to take note of here:

1. As web-tiki had mentioned in comments, the width and height of the pseudo-element were set to 100% and the parent element had dimensions of 0px x 0px (because the triangle was generated through border hack). Because of this the actual calculated dimensions of the child (pseudo-element) were also 0px x 0px and hence the image was not showing up. The content did show up when you put plain text because text typically overflows.
   The solution to this problem is to assign an explicit height & width to the child pseudo-element (as assigning a height & width to the parent would spoil the border hack).

2. When background-image is assigned to a pseudo-element and the size of the image is small compared to the container (pseudo-element), the background image is repeated as many times as possible to fit the container element. This should be avoided by setting background-repeat: no-repeat; and to position the image within the triangle we have to use the background-position property with the appropriate position values in pixels or percentages depending on the needs.

Below is the final snippet (with sample values for height, width & position):

#estatecorner {  position: absolute;  right: 0px;  width: 0;  height: 0;  border-style: solid;  border-width: 0 80px 80px 0;  border-color: transparent #67b2e4 transparent transparent;}#estatecorner.house::after {  position: absolute;  content: "";  width: 80px;  height: 80px;  background: url("http://i.imgur.com/nceI30v.png");  background-repeat: no-repeat;  background-position: 75% 40%;}

<div id="estatecorner" class="house"></div>

put a background image after text

If you want to put it really behind the text you should use pseudoelements:

h1:after { content:url(myimage.png); }

Sample here.

If you want to have a real background image you can only do this if you change the h1 to display:inline, since otherwise the element will stretch to the full width of its parent, thus losing all reference to the size of the contained text.

All other solutions (including the other ones mentioned here) require changing the HTML markup, and are as such not pure CSS solutions.

Pseudo element not showing background-image

the "display" property. display is CSS's most important property for controlling layout. Every element has a default display value depending on what type of element it is. The default for most elements is usually block or inline . A block element is often called a block-level element.

   &::before{
        content: "";
        display: block;/*missing prop*/
        background-image: url('/images/theseven/seven_img_old.png');
        background-repeat: no-repeat;
        position: relative;
        height: 817px;
        width: 150px;
    }

Pseudo element background-image does not work

Try this

h3:before{
    background-image: url(https://store.ashenglowgaming.com/wp-content/uploads/2018/02/cropped-agg-store-logo-4-FULLSIZE-1.jpg);
    background-size: contain;
    background-repeat: no-repeat;
    content: '';
    height: 110px;
    display: block;
}

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