Make a div position fixed

问题

I am making a very simple application where there is a need to implement parallax effect.

Things I have tried as of now,

-> Placed an image inside a div with class parallax.

-> Then placed an overlay div with bootstrap class card item-card card-block with headline, image and some text inside it.

.parallax {
    width: 100%;
    height: 250px;
    border-radius: 0;
}

.item-card {
  flex-direction: column;
  box-sizing: border-box;
  display: flex;
  place-content: center flex-start;
  align-items: center;
  margin: -24px 0 0;
  width: 100%;
  padding: 0;
  border-radius: 18px;
}

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css">
<div class="container mt-2">
  <div class="parallax">
      <img style="width: 100%" src="https://www.w3schools.com/howto/img_parallax.jpg" />
  </div>
  <div class="card item-card card-block">
       <h1 class="card-title text-center">Some big text here as headline</h1>
      <div class="card-body">
        <img  style="width: 100%" src="https://static.pexels.com/photos/7357/startup-photos.jpg" alt="Photo of sunset">
  </div>
        <h5 class="item-card-title mt-3 mb-3">Sierra Web Development • Owner</h5>
        <p class="card-text">This is a company that builds websites, web apps and e-commerce solutions.</p> 
  </div>
 </div>

Tried applying position:fixed to parallax div but that doesn't help.

The image div needs to be position fixed and then the next div card needs to scroll over it.

Changing the given image to background image makes entire div as not a responsive one.

回答1:

Try it like this

.parallax {
    background-image: url("https://www.w3schools.com/howto/img_parallax.jpg");
    width: 100%;
    height: 250px;
    border-radius: 0;

    background-attachment: fixed;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
}

.item-card {
  flex-direction: column;
  box-sizing: border-box;
  display: flex;
  place-content: center flex-start;
  align-items: center;
  margin: -24px 0 0;
  width: 100%;
  padding: 0;
  border-radius: 18px;
}

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css">
<div class="container mt-2">
  <div class="parallax">
  </div>
  <div class="card item-card card-block">
       <h1 class="card-title text-center">Some big text here as headline</h1>
      <div class="card-body">
        <img  style="width: 100%" src="https://static.pexels.com/photos/7357/startup-photos.jpg" alt="Photo of sunset">
  </div>
        <h5 class="item-card-title mt-3 mb-3">Sierra Web Development • Owner</h5>
        <p class="card-text">This is a company that builds websites, web apps and e-commerce solutions.</p> 
  </div>
 </div>

来源：https://stackoverflow.com/questions/62419621/make-a-div-position-fixed

标签

javascript

html

css

Sass

parallax