How do I change the size of an image in CSS?
You can use the CSS width
and height
properties to control the size of an image:
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img {
width: 400px;
height: 300px;
}
how to add box shadow grey
To add a box shadow to an element in CSS, use the box-shadow
property. You can specify the size, color and offset of the box shadow.
For example, the following will add a grey box shadow of 8px 8px 16px 0px to the element:
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box-shadow: 8px 8px 16px 0px #888888;
How to use background in css?
In CSS, the background
shorthand property is used to specify a number of background-related properties in one declaration. The background
property is a shorthand syntax for setting the individual properties background-image
, background-position
, background-size
, background-repeat
, background-origin
, background-clip
, background-attachment
, and background-color
simultaneously:
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background: image|position|size|repeat|origin|clip|attachment|color|initial|inherit;
For example, to set a background image and color, you can set the background
property in this way:
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background: url(backgroundImage.png) no-repeat fixed #dddddd;
The following table outlines the values you can use as part of the background
shorthand property:
Value | Description |
---|---|
image | Specifies an image to use as the background. |
position | Specifies the position for the background image. |
size | Specifies the size of the background image. |
repeat | Specifies how to repeat the background image. |
origin | Specifies the origin of the background-position property. |
clip | Specifies the painting area of the background image. |
attachment | Specifies whether to scroll with the content or not. |
color | Specifies a background color. |
initial | Sets this property to its default value. |
inherit | Inherits this property from its parent element. |
For more information, check out the MDN web docs guide on the background shorthand.
what is the difference between PX and EM
The difference between PX and EM is that PX is an absolute unit in CSS and EM is relative. PX is an absolute unit of measurement, meaning it will always be the same size regardless of the size of the viewport, while EM is relative to the font size of the parent element. PX is mainly used for fixed-width items such as font size, padding, and margins, while EM is mainly used for items that can have different measurements, such as headings, images, and text. More information can be found here.
css background image too big
If a CSS background image is too big, one way to adjust it is by using the background-size
property in the CSS. The background-size
property can take two values, cover
and contain
. cover
will scale the background image to be as large as possible so that the background area is completely covered. contain
will fit the whole image into the background without distortion, however, this may cause some parts of the background to be left empty.
For example:
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.background-image {
background-image: url(image.jpg);
background-size: cover;
}
More information on the background-size
property can be found in Mozilla's documentation.
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