CSS Transparent border means that the behind object can be seen if we apply the border as transparent or rgba. Transparent border property beautifies the HTML page by making behind objects distinctly visible. Real-time scenario: If any web page wants image border or text border wants to be transparent, then without any doubt we use the transparent property or rgba property. Transparent: Makes the background visible. Assign same task to other users to perform actions on it and also multiple users can at a time assign a task.
Border transparent property used to show the background through the border. Border transparent can also be achieved by rgba property value.
Here we discuss the introduction, examples and how does transparent border work in CSS? You may also have a look at the following articles to learn more —. Forgot Password? Popular Course in this category.
The method you are currently using means that you will not be able to set a semi transparent "background" on the triangle. This is because the black borders of the triangle are actually a slightly larger separate triangle, it just happens that the smaller white triangle is overlaying its center.
If you modify the white triangle's opacity then you will just peek through to the black triangle. This can be avoided by using another method to create the triangle. The general principle is to create a box then turn it on its side using transform: rotate 45deg. Using overflow: hidden; on the container you can cut off half of the box to leave you with a triangle without a bottom border. You can then skew the container using transform: skewX 55deg ; to push the triangle to one side.
I don't think you'd be able to make that background transparent easily with the technique you have used to draw triangles. You should use png image if you can.
Learn more. Asked 4 years, 7 months ago. Active 4 years, 7 months ago. Viewed times. Active Oldest Votes. Hidden Hobbes Hidden Hobbes Rohit Kumar Rohit Kumar 1, 1 1 gold badge 8 8 silver badges 24 24 bronze badges. Ok, thanx, that was the solution.
But when I want to make border-bottom-color white and transparent 0. When I change border-bottom-color to rgba 0, 0, 0. Is it a bug? Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Socializing with co-workers while social distancing.
Podcast Programming tutorials can be a real drag. Featured on Meta.The border shorthand CSS property sets an element's border. It sets the values of border-widthborder-styleand border-color. The source for this interactive example is stored in a GitHub repository. As with all shorthand properties, any omitted sub-values will be set to their initial value. Importantly, border cannot be used to specify a custom value for border-imagebut instead sets it to its initial value, i.
The border shorthand is especially useful when you want all four borders to be the same. To make them different from each other, however, you can use the longhand border-widthborder-styleand border-color properties, which accept different values for each side. Alternatively, you can target one border at a time with the physical e.
Borders and outlines are very similar. However, outlines differ from borders in the following ways:. The border property may be specified using one, two, or three of the values listed below. The order of the values does not matter. Note: The border will be invisible if its style is not defined. This is because the style defaults to none. It is often used to define a size as relative to an element's parent object.
Numerous properties can use percentages, such as width, height, margin, padding, and font-size. Get the latest and greatest from MDN delivered straight to your inbox. Sign in to enjoy the benefits of an MDN account. The compatibility table in this page is generated from structured data. Last modified: Apr 26,by MDN contributors. Related Topics. CSS CSS Reference CSS Backgrounds and Borders Guides Resizing background images with background-size Using multiple backgrounds Properties background background-attachment background-clip background-color background-image background-origin background-position background-position-x background-position-y background-repeat background-size border border-bottom border-bottom-color border-bottom-left-radius border-bottom-right-radius border-bottom-style border-bottom-width border-color border-image border-image-outset border-image-repeat border-image-slice border-image-source border-image-width border-left border-left-color border-left-style border-left-width border-radius border-right border-right-color border-right-style border-right-width border-style border-top border-top-color border-top-left-radius border-top-right-radius border-top-style border-top-width border-width box-shadow.The sum of 3 angles in a triangle must be degrees.
Usually, we have seen the equilateral triangle and right-angle triangle, we will see how to create these 2 triangles in this tutorial. We can form 4 triangles from a single square or rectangle. That full fill our requirement. Any HTML page structure should be like a top, right, bottom and left border. Finally, remove the two-side border of the above image then the resultant image should be like a triangle as below. From the above observation, we can technically set CSS values of border-bottom, border-left, border-right, and border-top to corresponding values in order to get a triangle.
It can be formed by setting border top color to green and the rest of the borders to transparent. It can be formed by setting border-bottom-color to green and the rest of the borders to transparent.
It is exactly an inverted image of the Top Equilateral Triangle. It can be formed by setting border-right-color to green and the rest of the borders to transparent. Base square and Height square sum are equal to hypothesis square and one angle is 90 degrees is said to be Right angle triangle. It can be formed by setting border-bottom-color and border-left color to brown and the rest of the borders to transparent. It can be formed by setting border top color and border-right-color to brown and the rest of the borders to transparent.
Exactly inverted image of Left Right-angle Triangle. Here we discuss the Introduction and how does triangle generator work in CSS along with examples and code implementation. You may also look at the following articles to learn more —.
Forgot Password? Popular Course in this category. Course Price View Course.Learn Development at Frontend Masters. You can make them with a single div. The idea is a box with zero width and height. The actual width and height of the arrow is determined by the width of the border.
In an up arrow, for example, the bottom border is colored while the left and right are transparent, which forms the triangle. Frontend Masters is the best place to get it.
CSS Triangle Mixin
And say, if i just need to make sure that the bottom part of the triangle is not there, how do i do that as well? Hey Ayush! You could change to color of the triangle by changing the colors in the visible border. Hey thank you very much! It worked! But can you tell me how to give a border to this type of triangle? As it is only made up of the border of a div!! Hey Tarun! There are several pages which show how to put arrows on tooltips, etc but they left me completely mystified as to how they worked.
Now at last, thanks to this page, I understand! Thanks for the reminder! Thanks, Otto. It appears to be more noticeable in Webkit, for some reason—not sure why.
Cool trick, I tried it first after seeing it elsewhere. Then I came across the ivy-leaf trick on this website, and if you want the triangle to scale with the text, change the ivy leaf to a triangle.
You can use those triangles to create Real-time 3D objects in IE6. Yes, IE6! I noticed a small issue with this technique in Firefox 5. Other browsers continue to render the triangles fine even after this border-style adjustment. Was working my mind through the reason for the strange micro-border! Is anyone else getting this? The line will always look a little jagged. If you want truly straight lines at whatever angle, you might want to explore SVG. You do some limited drop shadows using a pseudo-element.
A little rotation looks nice with this effect, too. I saw it in a NetTuts piece recently. Is it possible to use this on a [submit] button? I tried creating the same using two div and i got the same.Believe it or not, triangle shapes can be drawn with pure CSSno images needed.
The width of the borders determines the height of the triangles. Building on this knowledge, I can create just a singular triangle. But, if I remove the left and right borders, all the borders will just disappear, as the element will no longer have any width provided by those borders and will therefore render the element layout-less.
Read on for example markup for various types of triangles… Types of triangles Names are given to triangles to describe how many equal sides they have and the sizes of angles they contain.
An isosceles triangle has two equal sides and two equal angles. In the explanation of how to create a triangle above, I ended up with an isosceles triangle. Here I will go through and provide CSS markup for isosceles triangles pointing in different directions and of different widths and heights:. This is the same triangle I created for the explanation.
CSS Triangle Generator
The left and right borders should be transparent and the bottom border, which is the one that will form the triangle shape, should be coloured. A top border is not needed, and so can be left out. To create a downward pointing arrow, the left and right borders should be transparent and the top border should be coloured. A bottom border is not needed, and so can be left out. To create an arrow pointing to the left, the top and bottom borders should be transparent and the right border should be coloured.
A left border is not needed, and so can be left out. To create an arrow pointing to the right, the top and bottom borders should be transparent and the left border should be coloured. A right border is not needed, and so can be left out. To create a narrower triangle, I need to reduce the size of the left and right transparent borders.
To create a wider triangle, I need to increase the size of the left and right transparent borders. In my example, I have just used the upwards pointing isosceles triangle example, but increased the bottom border size a bit to even out the dimensions.
To create a scalene triangle, each border needs to be a different size. With this example, I took the upwards pointing isosceles triangle, increased the size of the bottom border a little to increase the height of the triangle, reduced the right border and increased the left border size to produce this result.
To create a right angle triangle, one of the borders need to be removed to create the sharp edge. In my example, I have removed the right hand border, the left is kept as transparent and given a width, and the bottom is coloured.
To create an obtuse angle triangle, I will actually have to create 2 right angled triangles and place them on top of one another to create the illusion; the first to be created is the coloured triangle, which will need to be positioned relatively. The second triangle needs to be the colour of the background of the web page it is to go onto in my case, white.
This second triangle needs to be positioned absolutely so it will sit over the top of the coloured triangleand therefore obscure a part of it. In my example, the right angle of the coloured triangle sits to the right of the shape, to I have positioned the second triangle to the right to block off that right angle with its own sloping angle.Creating triangles with CSS is a pretty good way to reduce the number of images within an application.CSS Positioning Tutorial for Beginners
Lets say we are constructing a triangle to use as an up arrow, the first thing to do is to create an element with a size of 0x0. A bottom border is then applied to the element with the colour set as the colour of the triangle. Then add left and right borders to the element with the colour set to transparent. Why did it come out in this shape? The three triangles in the triangle are actually the borders from. Triangles are usually drawn with the pseudo-elements ::before and ::after because this way they can be drawn to augment existing elements.
This is done using a pseudo-element to create the arrow, then using position:absolute to position the triangle to the correct spot. To get the pseudo-elements to work, a few standard rules are needed first so they will show up. These styles will print the original triangle from above but use the ::after pseudo-element.
Adding a border to the triangle is another handy trick to have in your arsenal. This can be done by creating a ::before element as well, which will be another triangle that is slightly larger and shifted a little towards the top and left of the element so the border evenly surrounds the ::after triangle. This shifting can be done with either negative margins or the leftrighttopbottom properties. Drawing a triangle Lets say we are constructing a triangle to use as an up arrow, the first thing to do is to create an element with a size of 0x0.
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