html - css3 drop shadow under another div

Html - css3 drop shadow under another div

To create a CSS3 drop shadow under another div in HTML, you can achieve this effect using CSS positioning and box-shadow properties. Here's a step-by-step approach to implement a drop shadow under one div that appears beneath another:

HTML Structure

Assume you have two div elements, where one div (#content) will sit on top of another div (#shadow) which will provide the drop shadow effect.

<div id="wrapper"> <div id="content"> <!-- Content of the top div --> </div> <div id="shadow"></div> </div>

CSS Styling

  1. Wrapper and Positioning: Use relative positioning on the wrapper (#wrapper) to control the positioning of the shadow (#shadow) relative to the content (#content).

  2. Content Div (#content): Style the content div (#content) as needed, specifying its background color, size, and any other styling relevant to your layout.

  3. Shadow Div (#shadow): Style the shadow div (#shadow) with a box-shadow that will appear below the content div (#content). Set its position to absolute so that it can be placed beneath the content div.

#wrapper { position: relative; width: 300px; /* Adjust width as needed */ height: 200px; /* Adjust height as needed */ margin: 0 auto; /* Centering the wrapper */ } #content { background-color: #fff; /* Background color of the content */ padding: 20px; /* Adjust padding as needed */ border-radius: 8px; /* Optional: Rounded corners */ z-index: 2; /* Ensure content is above shadow */ } #shadow { position: absolute; top: 10px; /* Adjust vertical position as needed */ left: 10px; /* Adjust horizontal position as needed */ width: calc(100% - 20px); /* Adjust width to match content minus shadow space */ height: calc(100% - 20px); /* Adjust height to match content minus shadow space */ box-shadow: 0px 4px 8px rgba(0, 0, 0, 0.2); /* Adjust shadow properties as needed */ z-index: 1; /* Ensure shadow is below content */ }

Explanation

  • Wrapper (#wrapper): Positioned relative to establish a coordinate system for absolute positioning of the shadow.

  • Content (#content): Positioned above the shadow with a higher z-index. Adjust its background color, padding, and other styling properties as needed.

  • Shadow (#shadow): Positioned absolutely with top and left properties to place it beneath the content div (#content). The box-shadow property adds the drop shadow effect. Adjust the rgba() values to control the shadow's color and transparency.

Notes

  • Ensure that the #shadow div is positioned correctly relative to the #content div to achieve the desired visual effect.
  • Adjust dimensions, colors, and shadow properties (box-shadow) based on your specific design requirements.
  • Using z-index, ensure that the #content div appears above the #shadow div to maintain the layering order.

By following these steps and adjusting the CSS properties as necessary, you can create a CSS3 drop shadow effect that appears under another div in your HTML layout.

Examples

  1. How to create a drop shadow under a div using CSS? Description: Use box-shadow property to add a drop shadow to a div.

    <style> .shadowed-div { width: 200px; height: 100px; background-color: #ffffff; box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.5); } </style> <div class="shadowed-div"></div>

  2. How to position a drop shadow beneath another div using CSS? Description: Use position: relative and z-index to layer divs and apply drop shadow to the bottom div.

    <style> .container { position: relative; width: 200px; height: 100px; } .shadowed-div { position: absolute; top: 10px; /* Adjust as needed */ left: 10px; /* Adjust as needed */ width: 100%; height: 100%; background-color: #ffffff; box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.5); z-index: -1; } .content-div { position: relative; z-index: 1; } </style> <div class="container"> <div class="shadowed-div"></div> <div class="content-div"> Content goes here </div> </div>

  3. How to add a drop shadow under a transparent div using CSS? Description: Use ::after pseudo-element to create a shadow effect under a transparent div.

    <style> .shadowed-div { width: 200px; height: 100px; position: relative; background-color: transparent; } .shadowed-div::after { content: ''; position: absolute; top: 5px; /* Adjust as needed */ left: 5px; /* Adjust as needed */ width: 100%; height: 100%; box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.5); z-index: -1; } </style> <div class="shadowed-div"> Content goes here </div>

  4. How to apply a drop shadow under a floating div using CSS? Description: Use float: left or float: right along with box-shadow to create a drop shadow under a floating div.

    <style> .float-div { float: left; /* or float: right */ width: 200px; height: 100px; background-color: #ffffff; box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.5); } </style> <div class="float-div"> Floating div with drop shadow </div>

  5. How to create a drop shadow under an absolutely positioned div? Description: Use position: absolute and adjust top, left, bottom, or right properties along with box-shadow.

    <style> .abs-div { position: absolute; top: 50px; left: 50px; width: 200px; height: 100px; background-color: #ffffff; box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.5); } </style> <div class="abs-div"> Absolutely positioned div with drop shadow </div>

  6. How to create a drop shadow under a fixed position div using CSS? Description: Use position: fixed and box-shadow to create a drop shadow under a fixed position div.

    <style> .fixed-div { position: fixed; top: 10px; left: 10px; width: 200px; height: 100px; background-color: #ffffff; box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.5); } </style> <div class="fixed-div"> Fixed position div with drop shadow </div>

  7. How to create a drop shadow under a centered div using CSS? Description: Use margin: auto to center the div and apply box-shadow for the drop shadow effect.

    <style> .centered-div { width: 200px; height: 100px; background-color: #ffffff; box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.5); margin: auto; } </style> <div class="centered-div"> Centered div with drop shadow </div>

  8. How to add a drop shadow under a div with rounded corners? Description: Use border-radius along with box-shadow to create a drop shadow under a div with rounded corners.

    <style> .rounded-div { width: 200px; height: 100px; background-color: #ffffff; border-radius: 10px; box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.5); } </style> <div class="rounded-div"> Rounded div with drop shadow </div>

  9. How to create a drop shadow under a div with a gradient background? Description: Use linear-gradient for background and box-shadow for drop shadow.

    <style> .gradient-div { width: 200px; height: 100px; background: linear-gradient(to right, #ffffff, #f0f0f0); box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.5); } </style> <div class="gradient-div"> Gradient background div with drop shadow </div>

  10. How to add a drop shadow under a div with a border? Description: Use border property and box-shadow to create a drop shadow under a div with a border.

    <style> .bordered-div { width: 200px; height: 100px; background-color: #ffffff; border: 1px solid #ccc; box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.5); } </style> <div class="bordered-div"> Bordered div with drop shadow </div>

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