Set width of flex items

In this guide we will be exploring the three properties that are applied to flex items, which enable us to control the size and flexibility of the items along the main axis — flex-growflex-shrinkand flex-basis. Fully understanding how these properties work with growing and shrinking items is the real key to mastering flexbox. The properties are usually expressed as the shorthand flex property. The following code would set the flex-grow property to 2flex-shrink to 1 and flex-basis to auto.

If you have read the article Basic Concepts of Flexboxthen you will have already had an introduction to the properties. Here we will explore them in depth in order that you can fully understand what the browser is doing when you use them. There are a few concepts worth digging into before looking at how the flex properties work to control ratios along the main axis. These relate to the natural size of flex items before any growing or shrinking takes place, and to the concept of free space.

In order to work out how much space there is available to lay out flex items, the browser needs to know how big the item is to start with. There is a concept in CSS of min-content and max-content — these keywords are defined in the CSS Intrinsic and Extrinsic Sizing Specificationand can be used in place of a length unit.

The first paragraph has a width of min-content. In a browser that supports this keyword you should be able to see that the text has taken all of the soft wrapping opportunities available to it, becoming as small as it can be without overflowing.

The Difference Between Width and Flex Basis

This then, is the min-content size of that string. Essentially, the longest word in the string is dictating the size. The second paragraph has a value of max-content and so it does the opposite. It gets as big as it possibly can be, taking no soft-wrapping opportunities. It would overflow the box it is in if that container was too narrow. If your browser does not yet support these keywords both paragraphs will be rendered as normal paragraphs in block flow; the below screenshots show the expected rendering.

Remember this behavior and what effects min-content and max-content have as we explore flex-grow and flex-shrink later in this article. To talk about these properties we need to understand the concept of positive and negative free space. When a flex container has positive free space, it has more space than is required to display the flex items inside the container. For example, if I have a pixel-wide container, flex-direction is rowand I have three flex items each pixels wide, then I have pixels of positive free space, which could be distributed between the items if I wanted them to fill the container.

We have negative free space when the natural size of the items adds up to larger than the available space in the flex container. If I have a pixel-wide container like the one above, but the three flex items are each pixels wide, the total space I need will be pixels, so I have pixels of negative free space.

This could be removed from the items in order to make them fit the container. It is this distribution of positive free space and removal of negative free space that we need to understand in order to understand the flex properties.

In the following examples I am working with flex-direction set to row, therefore the size of items will always come from their width.Note: If the element is not a flexible item, the flex property has no effect. If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail:. LOG IN. New User?

Set Flex Items into equal width columns with Bootstrap

Sign Up For Free! Forgot password? Default value: 0 1 auto Inherited: no Animatable: yes, see individual properties. Property flex Value Description flex-grow A number specifying how much the item will grow relative to the rest of the flexible items flex-shrink A number specifying how much the item will shrink relative to the rest of the flexible items flex-basis The length of the item.

Read about initial none Same as 0 0 auto.

FLEXBOX Centering Divs with Justify-Content \u0026 Align-Items Explained - CSS Flexbox Tutorial 2021

Read about inherit. Get your certification today! View options. HOW TO. Your message has been sent to W3Schools. W3Schools is optimized for learning and training. Examples might be simplified to improve reading and learning. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content.

While using W3Schools, you agree to have read and accepted our terms of usecookie and privacy policy. Copyright by Refsnes Data. All Rights Reserved. W3Schools is Powered by W3. Read about animatable. The length of the item. Inherits this property from its parent element.This is by far the most common flexbox question I get asked.

In fact I remember googling this very thing myself back when I was still just guessing with flexbox. Checking my Google search history it looks like I searched a variation of "flex-basis vs width vs min-width" 4 different times last year. Talk about slacking! Let's answer this question today and hopefully spare you some future searches. For determining the size of a flex item the final flex-basis bound by min-width and max-width is all that matters. NOTE: The flexbox spec calls this the "hypothetical main size", but it's a lot simpler to think of it as the final flex-basis.

If no flex-basis is specified, then the flex-basis falls back to the item's width property. If no width is specified, then the flex-basis falls back to the computed width of the item's contents. Let's put some px by px items that specify a width into our flex container.

In this example our items' flex-basis wasn't specified, so it defaulted to flex-basis: autowhich falls back to the width px. Let's see what happens when we set a flex-basis on these items that already have a width specified. As you can see, when a flex-basis is specified, the width of our boxes is ignored, so we don't even need to specify it:. Our final flex-basis for each item is px.

And since we have enough room for all of those, they'll fit nicely into their flex container:. The only thing that matters is the final flex-basis. A best practice is to just use flex-basis instead of width or height. Especially since Safari still has an old flexbox bug where it won't apply flex-shrink properly to items that use height instead of flex-basis. The final flex-basis value is limited by both the min-width and max-width of the item. Watch what happens when we set a max-width limit to our flex items:.

Even though our flex-basis was set to px, it hit the px max-width limit. So our final flex-basis in this case is px, and our items will fit into the flex container like so:. Now let's set a min-width and see how that limits our final flex-basis :. Even though we specified px for our flex-basisit couldn't go lower than the px min-width limit.

So our final flex-basis is px and our flex items fit perfectly into the container:. Now we understand that width is just a fallback when flex-basis is missing, and min-width and max-width are just upper and lower limits for the final flex-basis. So what exactly is flex-basis? You probably noticed that in all of our illustrations we visualized the size of the flex items before they got put into the flex container.

We did that because that's exactly what flex-basis is: the size of flex items before they are placed into a flex container. It's the ideal or hypothetical size of the items. But flex-basis is not a guaranteed size!The flex CSS shorthand property sets how a flex item will grow or shrink to fit the space available in its flex container.

The source for this interactive example is stored in a GitHub repository. For most purposes, authors should set flex to one of the following values: autoinitialnoneor a positive unitless number. To see the effect of these values, try resizing the flex containers below:. By default flex items don't shrink below their minimum content size. To change this, set the item's min-width or min-height.

Skip to main content Skip to search flex. This property is a shorthand for the following CSS properties: flex-grow flex-shrink flex-basis. It shrinks to its minimum size to fit the container, but does not grow to absorb any extra free space in the flex container.

This is equivalent to setting " flex: 0 1 auto ". This is equivalent to setting " flex: 1 1 auto ".

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It is fully inflexible: it neither shrinks nor grows in relation to the flex container. This is equivalent to setting " flex: 0 0 auto ". Negative values are considered invalid. Defaults to 1 when omitted. A preferred size of 0 must have a unit to avoid being interpreted as a flexibility.

Defaults to 0 when omitted. Initial value as each of the properties of the shorthand: flex-grow : 0 flex-shrink : 1 flex-basis : auto Applies to flex items, including in-flow pseudo-elements Inherited no Computed value as each of the properties of the shorthand: flex-grow : as specified flex-shrink : as specified flex-basis : as specified, but with relative lengths converted into absolute lengths Animation type as each of the properties of the shorthand: flex-grow : a CSS data type are interpolated as real, floating-point, numbers.

Candidate Recommendation Initial definition. The compatibility table on this page is generated from structured data.When it comes to size, flex items inside a flex container behave in a "flex box" kind of way that is new in CSS, and hence may be confusing at first.

We can of course change this behaviour, but this is how flex items behave out of the box, and is where a lot of the confusion stems from. Controlling the size of flex items mainly rests on the flex property, added to each individual flex item.

The most common way to this property is to set it to an integer to define the flex item's size as a portion of the total width.

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Lets say we want to create a 3 columns layout with equal widths; we could do this by adding flex:1 to each flex item:. Figure 6a: 3 flex items of equal widths using the flex property. Here we are giving each flex item a flex value of 1, which adds up to 3 in total. So we can think of an integer assigned to each flex property as a portion of the total width, with the total width being the values of all of the flex properties added up. The following example changes the previous example so the middle column is twice as wide as the remaining two, by giving it a flex value of 2 while the other flex items gets a value of Figure 6b: 3 flex items with middle column 2x width of the other two using the flex property.

In this case we're dividing the total width of the flex container into 4 parts, with the middle column receiving two portions of it while the remaining two columns get 1 portion each.

This makes the middle column twice as large as the other two. The flex property is actually a shorthand property for 3 properties: flex-growflex-shrinkand flex-basis.

set width of flex items

While we can declare the later 3 properties individually to control a flex item's size, the W3C specifications encourage us to use the shorthand flex property whenever possible, as it automatically takes care of resetting the values of any of the 3 unused properties to their most common use case.

The following table lists the most common accepted values for the flex property, and what it translates to in longhand syntax:. We already saw assigning the flex property an integer to size a flex item as a portion of the total width. Combining the two ideas, lets change our 3 columns layout to the following dimensions:. Figure 6c: 3 flex items with column 1 always being px wide. The key to making the first column a flex item fixed in width that never grows or shrinks is the following CSS:.

We set the flex property to " none " here, which basically makes this flex item inflexible unable to grow or shrink. Then, any width property we declare becomes the sole determinator of the width of the flex item. Instead of setting flex to " none " and using the " width " property to define a fixed width for a flex item, we can accomplish the same using just the flex property.

The key is to use the slightly longer syntax that sets the flex-growflex-shrinkand flex-basis properties separately:. Here we're tweaking the 3 properties flex-growflex-shrinkand flex-basis individually to create that px fixed width flex item, by explicitly specifying that the target flex item:.

The 2nd method, however, is more versatile in that it lets you set a default, explicit width for a flex item yet at the same time optionally make it flex when there is ample space - or lack of space to maintain that fixed width.

For example:. Take the flex property out for a spin yourself to better grasp how it works. Launch the flex playground below and change the flex property inside the 3 flex items.

Resize your browser to see how the widths grow or shrink or not based on the values you've entered:. Playground: " flex " property. And last but not least, we arrive at the order property.

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As its name implies, it lets you change the display order of flex items relative to its peers, independent from the items' order in the source code. This means you can order your content physically one way within the source code, yet display them visually using a different order.

The order property simply takes an integer as a value negative allowed. Added inside the participating flex item sthe lower the value, the higher up the display order of the flex item relative to other participants. This can be done simply using the order property:. Lets put everything we've learnt in this section together to create a full blown 3 column layout using CSS Flexbox, taking advantage of the flex property to precisely control the flex items' dimensions, and the order property to change their display order:.

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set width of flex items

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Controlling Ratios of Flex Items Along the Main Axis

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AfterShip allows you to view all details about your shipment, including all the stops it's making along the way.Wazzu's defense has steadily gotten worse as the season goes along. They allowed 91 to Idaho on the road and 81 to UC Davis as well. Robert Franks and Malachi Flynn are averaging over 36 points per game combined.

UTEP is feeling good after a 88-76 home win over New Mexico last time out. They will be once again without Matt Wilms in the middle. That will make the Miners defense much worse considering he's their enforcer type. Extra pressure now on Keith Frazier and Omega Harris. UTEP has gone over in 14 of their last 21 games when the total is 140 to 149. This game features the 13-11 Sixers and the 18-8 Cavs. This game will be easy pickings as the Sixers will rest their star Joel Embid and this line just is too low.

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set width of flex items

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Denver, which has lost eight in a row after a 3-1 start enters into this game in a shambles. HC Vance Joseph's first year as head coach hasn't gone as planned, and the entire team looks to be on the verge of mutiny. Meanwhile, the Jets behind veteran quarterback Josh McCown are doing well in what was supposed to be a rebuilding season. The experienced QB has 18 touchdown passes and only eight interceptions while playing every snap this season.

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