Background color radial top bttom react native css

Question

You can give any element “rounded corners” by applying a

border-radius: <length-percentage [0,∞]>{1,4} [ / <length-percentage [0,∞]>{1,4} ]?

Nội dung chính Show

Constituent properties
Browser support
How do you give a border bottom radius in react native?
How do I change the border radius in react native?
How do I change the top border radius in CSS?
How do I give border radius to bottom border in CSS?

0 through CSS. You’ll only notice if there is a color change involved. For instance, if the element has a background-color or border that is different than the element it’s above.

.element {
  border-radius: 10px;
}

Constituent properties

border-radius: <length-percentage [0,∞]>{1,4} [ / <length-percentage [0,∞]>{1,4} ]?

0 is what we call a “shorthand” property. That means it sets the following individual properties in a single declaration:

border-radius: <length-percentage [0,∞]>{1,4} [ / <length-percentage [0,∞]>{1,4} ]? 2
border-radius: <length-percentage [0,∞]>{1,4} [ / <length-percentage [0,∞]>{1,4} ]? 3
border-radius: <length-percentage [0,∞]>{1,4} [ / <length-percentage [0,∞]>{1,4} ]? 4
border-radius: <length-percentage [0,∞]>{1,4} [ / <length-percentage [0,∞]>{1,4} ]? 5

Logical properties

Those are referred to as “physical” properties because they set the radius according to the physical location of the corner (e.g. top-left). But

border-radius: <length-percentage [0,∞]>{1,4} [ / <length-percentage [0,∞]>{1,4} ]?

0 is part of the Logical Properies and Values specification, meaning it has logical equivalents of the physical properties:

Physical propertyLogical property

border-radius: <length-percentage [0,∞]>{1,4} [ / <length-percentage [0,∞]>{1,4} ]?

2

border-radius: <length-percentage [0,∞]>{1,4} [ / <length-percentage [0,∞]>{1,4} ]?

8

border-radius: <length-percentage [0,∞]>{1,4} [ / <length-percentage [0,∞]>{1,4} ]?

3

/* Single value */
/* Sets all four corners */
border-radius: 10px;
/* Two values /*
/* top-left and bottom-right top-right and bottom-left  */
border-radius: 25% 0;
/* Three values */
/* top-left top-right/bottom-left bottom-right */
border-radius: 1rem 1.5rem 1.25rem;
/* Four values */
/* top-left top-right bottom-right bottom-left */
border-radius: 8px 10px 12px 14px;
/* Global values */
border-radius: inherit;
border-radius: initial;
border-radius: revert;
border-radius: revert-layer;
border-radius: unset;

0

border-radius: <length-percentage [0,∞]>{1,4} [ / <length-percentage [0,∞]>{1,4} ]?

5

/* Single value */
/* Sets all four corners */
border-radius: 10px;
/* Two values /*
/* top-left and bottom-right top-right and bottom-left  */
border-radius: 25% 0;
/* Three values */
/* top-left top-right/bottom-left bottom-right */
border-radius: 1rem 1.5rem 1.25rem;
/* Four values */
/* top-left top-right bottom-right bottom-left */
border-radius: 8px 10px 12px 14px;
/* Global values */
border-radius: inherit;
border-radius: initial;
border-radius: revert;
border-radius: revert-layer;
border-radius: unset;

2

border-radius: <length-percentage [0,∞]>{1,4} [ / <length-percentage [0,∞]>{1,4} ]?

4

/* Single value */
/* Sets all four corners */
border-radius: 10px;
/* Two values /*
/* top-left and bottom-right top-right and bottom-left  */
border-radius: 25% 0;
/* Three values */
/* top-left top-right/bottom-left bottom-right */
border-radius: 1rem 1.5rem 1.25rem;
/* Four values */
/* top-left top-right bottom-right bottom-left */
border-radius: 8px 10px 12px 14px;
/* Global values */
border-radius: inherit;
border-radius: initial;
border-radius: revert;
border-radius: revert-layer;
border-radius: unset;

4

It’s a bit mind-bendy at first, but the order really matters, especially when working with

border-radius: <length-percentage [0,∞]>{1,4} [ / <length-percentage [0,∞]>{1,4} ]?

0 as a shorthand. The order goes like this, where the first direction refers to the block direction and the second direction refers to the inline direction.

Physical propertyLogical property

/* Single value */
/* Sets all four corners */
border-radius: 10px;
/* Two values /*
/* top-left and bottom-right top-right and bottom-left  */
border-radius: 25% 0;
/* Three values */
/* top-left top-right/bottom-left bottom-right */
border-radius: 1rem 1.5rem 1.25rem;
/* Four values */
/* top-left top-right bottom-right bottom-left */
border-radius: 8px 10px 12px 14px;
/* Global values */
border-radius: inherit;
border-radius: initial;
border-radius: revert;
border-radius: revert-layer;
border-radius: unset;

6

/* Single value */
/* Sets all four corners */
border-radius: 10px;
/* Two values /*
/* top-left and bottom-right top-right and bottom-left  */
border-radius: 25% 0;
/* Three values */
/* top-left top-right/bottom-left bottom-right */
border-radius: 1rem 1.5rem 1.25rem;
/* Four values */
/* top-left top-right bottom-right bottom-left */
border-radius: 8px 10px 12px 14px;
/* Global values */
border-radius: inherit;
border-radius: initial;
border-radius: revert;
border-radius: revert-layer;
border-radius: unset;

7

/* Single value */
/* Sets all four corners */
border-radius: 10px;
/* Two values /*
/* top-left and bottom-right top-right and bottom-left  */
border-radius: 25% 0;
/* Three values */
/* top-left top-right/bottom-left bottom-right */
border-radius: 1rem 1.5rem 1.25rem;
/* Four values */
/* top-left top-right bottom-right bottom-left */
border-radius: 8px 10px 12px 14px;
/* Global values */
border-radius: inherit;
border-radius: initial;
border-radius: revert;
border-radius: revert-layer;
border-radius: unset;

8

/* Single value */
/* Sets all four corners */
border-radius: 10px;
/* Two values /*
/* top-left and bottom-right top-right and bottom-left  */
border-radius: 25% 0;
/* Three values */
/* top-left top-right/bottom-left bottom-right */
border-radius: 1rem 1.5rem 1.25rem;
/* Four values */
/* top-left top-right bottom-right bottom-left */
border-radius: 8px 10px 12px 14px;
/* Global values */
border-radius: inherit;
border-radius: initial;
border-radius: revert;
border-radius: revert-layer;
border-radius: unset;

9

.element {
  /* top-left top-right/bottom-left bottom-right */
  border-radius: 5px 20px 5px;
  background: 
# BADA55;
}

0

.element {
  /* top-left top-right/bottom-left bottom-right */
  border-radius: 5px 20px 5px;
  background: 
# BADA55;
}

1

.element {
  /* top-left top-right/bottom-left bottom-right */
  border-radius: 5px 20px 5px;
  background: 
# BADA55;
}

2

.element {
  /* top-left top-right/bottom-left bottom-right */
  border-radius: 5px 20px 5px;
  background: 
# BADA55;
}

3

Syntax

border-radius: <length-percentage [0,∞]>{1,4} [ / <length-percentage [0,∞]>{1,4} ]?

Initial value: .element { / top-left top-right/bottom-left bottom-right / border-radius: 5px 20px 5px; background: BADA55; } 4
Applies to: all elements
Inherited: no
Computed values: pair of computed values
Animation: by computed value

The

border-radius: <length-percentage [0,∞]>{1,4} [ / <length-percentage [0,∞]>{1,4} ]?

0 property takes between one and four length or percentage values, where one value sets the radius for all four corners at once, while four sets each individual corner.

/* Single value */
/* Sets all four corners */
border-radius: 10px;
/* Two values /*
/* top-left and bottom-right top-right and bottom-left  */
border-radius: 25% 0;
/* Three values */
/* top-left top-right/bottom-left bottom-right */
border-radius: 1rem 1.5rem 1.25rem;
/* Four values */
/* top-left top-right bottom-right bottom-left */
border-radius: 8px 10px 12px 14px;
/* Global values */
border-radius: inherit;
border-radius: initial;
border-radius: revert;
border-radius: revert-layer;
border-radius: unset;

So, if we wanted to set a different radius on the top-left and bottom-right but apply the same radius on the top-right and bottom-left together, we can use the three-value syntax:

.element {
  /* top-left top-right/bottom-left bottom-right */
  border-radius: 5px 20px 5px;
  background: 
# BADA55;
}

Elliptical rounding (

.element {
  /* top-left top-right/bottom-left bottom-right */
  border-radius: 5px 20px 5px;
  background: 
# BADA55;
}

6)

You may also specify the radiuses in which the corner is rounded by. In other words, the rounding doesn’t have to be perfectly circular, it can be elliptical. This is done using a slash (

.element {
  /* top-left top-right/bottom-left bottom-right */
  border-radius: 5px 20px 5px;
  background: 
# BADA55;
}

between two values:

.element {
  border-radius: 10px / 30px; /* horizontal radius / vertical radius */
}

Note: Firefox only supported elliptical borders in 3.5+. Older WebKit browsers (e.g. Safari 4 and below) incorrectly treat

.element {
  /* top-left top-right/bottom-left bottom-right */
  border-radius: 5px 20px 5px;
  background: 
# BADA55;
}

8 the same as

.element {
  /* top-left top-right/bottom-left bottom-right */
  border-radius: 5px 20px 5px;
  background: 
# BADA55;
}

9.

Values

The

border-radius: <length-percentage [0,∞]>{1,4} [ / <length-percentage [0,∞]>{1,4} ]?

0 property can accept any valid CSS length unit. That means everything from

.element {
  border-radius: 10px / 30px; /* horizontal radius / vertical radius */
}

1,

.element {
  border-radius: 10px / 30px; /* horizontal radius / vertical radius */
}

2,

.element {
  border-radius: 10px / 30px; /* horizontal radius / vertical radius */
}

3,

.element {
  border-radius: 10px / 30px; /* horizontal radius / vertical radius */
}

4,

.element {
  border-radius: 10px / 30px; /* horizontal radius / vertical radius */
}

5,

.element {
  border-radius: 10px / 30px; /* horizontal radius / vertical radius */
}

6, and a whole bunch more are fair play.

You may specify the value of

border-radius: <length-percentage [0,∞]>{1,4} [ / <length-percentage [0,∞]>{1,4} ]?

0 in percentages. This is particularly useful for creating a circle or ellipse shape, but can be used any time you want the

border-radius: <length-percentage [0,∞]>{1,4} [ / <length-percentage [0,∞]>{1,4} ]?

0 to be directly correlated with the element’s width.

.element {
  border-radius: 50%;
  width: 200px;
}

Note: In Safari percentage values for

border-radius: <length-percentage [0,∞]>{1,4} [ / <length-percentage [0,∞]>{1,4} ]?

0 only supported in 5.1+. In Opera, only supported in 11.5+.

Gotchas

There are a few things to watch for when working with the

border-radius: <length-percentage [0,∞]>{1,4} [ / <length-percentage [0,∞]>{1,4} ]?

0 property:

Clipped background images

If the element has an image background, it will be clipped at the rounded corner naturally:

.element {
  border-radius: 20px;
  background: url(bglines.png); /* will get clipped */
}

Background color bleed

Sometimes you can see a

.element {
  border-radius: 50%;
  width: 200px;
}

1 “leak” outside of a border when

border-radius: <length-percentage [0,∞]>{1,4} [ / <length-percentage [0,∞]>{1,4} ]?

0 is present (here’s a perfect example). To prevent this you use the CSS

.element {
  border-radius: 50%;
  width: 200px;
}

3 property:

.element {
  border-radius: 10px;
  /* Prevent background color leak outs */
  -webkit-background-clip: padding-box; 
  -moz-background-clip:    padding; 
  background-clip:         padding-box;
}

Overlapping border radii

Jay Sitter covered what happens when the value of one corner radius is so big that it overlaps the radius of another corner. Like this example, where we’re going for a “pill” shape on the right side with less rounding on the left:

We’re swtting a radius of

.element {
  border-radius: 50%;
  width: 200px;
}

4 on the top-left and bottom-left corners, so why are they so boxy? That’s because the

.element {
  border-radius: 50%;
  width: 200px;
}

5 value of the other two corners is covering them up. Jay digs deep into the math behind this and how to prevent it from happening, so it’s worth reading his article for more context.

Demo

Browser support

Desktop

ChromeFirefoxIEEdgeSafari4*3*9123.1*

Mobile / Tablet

Android ChromeAndroid FirefoxAndroidiOS Safari1191192.1*3.2*

It’s unnecessary now, but for the absolute best possible browser support, you could prefix the property with

.element {
  border-radius: 50%;
  width: 200px;
}

6 and

.element {
  border-radius: 50%;
  width: 200px;
}

7 to ensure legacy browsers can join the fun:

.element {
  /* Safari 3-4, iOS 1-3.2, Android 1.6- */
  -webkit-border-radius: 12px; 
  /* Firefox 1-3.6 */
  -moz-border-radius: 12px; 
  /* Opera 10.5, IE 9, Safari 5, Chrome, Firefox 4, iOS 4, Android 2.1+ */
  border-radius: 12px; 
}

Notice the order of those properties: the vendor prefixes are listed first and the non-prefixed “spec” version is listed last. This is the correct way to do it. Border radius is a particularly good example of why we do it that way. In slightly more complicated version of using

border-radius: <length-percentage [0,∞]>{1,4} [ / <length-percentage [0,∞]>{1,4} ]?

0 (where you pass two values instead of one), the older

.element {
  border-radius: 50%;
  width: 200px;
}

6 vendor prefix would do something entirely different than the “spec” version. So, if we blindly copy-and-paste the same values to all three properties, we could see different results cross-browser. For the most consistency long-term, it’s best to list the “spec” version last.

It’s pretty realistic these days to drop prefixes and just use vanilla

border-radius: <length-percentage [0,∞]>{1,4} [ / <length-percentage [0,∞]>{1,4} ]?

0, as discussed here.

Here’s each individual property, with vendor prefixes:

.element {
  -webkit-border-top-left-radius: 1px;
  -webkit-border-top-right-radius: 2px;
  -webkit-border-bottom-right-radius: 3px;
  -webkit-border-bottom-left-radius: 4px;
  -moz-border-radius-topleft: 1px;
  -moz-border-radius-topright: 2px;
  -moz-border-radius-bottomright: 3px;
  -moz-border-radius-bottomleft: 4px;
  border-top-left-radius: 1px;
  border-top-right-radius: 2px;
  border-bottom-right-radius: 3px;
  border-bottom-left-radius: 4px;
}

Each of these values can have a space-separated value as well, like

.element {
  border-radius: 20px;
  background: url(bglines.png); /* will get clipped */
}

1, which behaves the same as a slash-separated value in shorthand (

.element {
  border-radius: 20px;
  background: url(bglines.png); /* will get clipped */
}

2

.element {
  border-radius: 20px;
  background: url(bglines.png); /* will get clipped */
}

3

.element {
  border-radius: 20px;
  background: url(bglines.png); /* will get clipped */
}

4).

How do you give a border bottom radius in react native?

Border Radius in React NativeThe borderRadius property can be set as the style attribute to any element. It takes a value in pixels and assigns that value to the overall border radius of that UI element. By default, the border radius of any element is 0 if you haven't added that style attribute to that element.

How do I change the border radius in react native?

borderTopRightRadius: This property allows you to define a specific radius for the top-right corner. borderBottomLeftRadius: This property allows you to define a specific radius for the bottom-left corner. borderBottomRightRadius: This property allows you to define a specific radius for the bottom-right corner.

How do I change the top border radius in CSS?

CSS Syntaxborder-top-left-radius: length|% [length|%]|initial|inherit; Note: If you set two values, the first one is for the top border, and the second one for the left border.

How do I give border radius to bottom border in CSS?

CSS Syntaxborder-bottom-left-radius: length|% [length|%]|initial|inherit; Note: If you set two values, the first one is for the bottom border, and the second one for the left border.

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