Why does React Native not offer a justify-self

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I want to align an item in the primary axis. For example, I want to have a row with a few children all aligned left, and then one child aligned on the right side.

You could achieve that effect with something like "position: absolute; right: 0", but I'm wondering if theres a better way. It seems like there ought to be a justifySelf property, that only affects one child and affects its alignment on the primary axis, in the same way the alignSelf affects one child's alignment on the secondary axis.

Yet no such justifySelf seems to exist. Why is this?

It's similar to this question but not quite: How can you float: right in React Native?


I don't know React Native, but I do know flexbox!

Use the following code as a guide:

<div style="display: flex;">

  <div>
    I'll be on the left side
  </div>
  <div>
    I'll be hugging the guy on the left side
  </div>
  <div>
    I'll be hugging the guy hugging the guy on the left side
  </div>
  <div style="margin-left: auto;">
    I'll be hugging the right side far away from those other guys
  </div>

</div>

The margin set on the last child will push all other children to the left as far as their styles will allow, and push itself as far right as any other styles will allow.

You can test this out by also adding margin-right: auto; to the last child, and you will see the last child centered perfectly in the remaining space of the parent div, after the first three children take up their allotted space. This is because the competing "margin autos" will both share equally whatever space remains, since they can't cancel each other out and won't override each other.

Flex box was designed to handle margin spacing like this, so take advantage of it, as well as the other unique spacing options available under the justify-content property.

Helpful article: https://hackernoon.com/flexbox-s-best-kept-secret-bd3d892826b6

In CSS Flexbox, why are there no "justify-items" and "justify-self , a grid with 3 columns ( auto 1fr auto ). React Native is still a bit slower than purely native. There is a communication overhead between the JavaScript thread and the Native UI thread, which happens over the React Native bridge. Optimizing React Native applications is essentially optimizing this bridge communication. React Native does not provide complete solutions in JavaScript land.


I believe you want to achieve something like this:

You can implement this by nesting views which share the same justifyContent property.

  <View style={{
    flex: 1,
    flexDirection: 'column',
    justifyContent: 'space-between',
  }}>
    <View>
      <View style={{width: 50, height: 50, backgroundColor: 'powderblue'}} />
      <View style={{width: 50, height: 50, backgroundColor: 'skyblue'}} />
    </View>
    <View style={{width: 50, height: 50, backgroundColor: 'steelblue'}} />
  </View>

React-native textAlign justify, Flexbox is designed to provide a consistent layout on different screen sizes. For stretch to have an effect, children must not have a fixed dimension along the Align Self. alignSelf has the same options and effect as alignItems but instead of  The justifyContent: space-between for the Tab should not be necessary, but doesn't hurt. This should create three equal sections. This should create three equal sections. share | improve this answer


A partial answer: there's no justifySelf in React Native because there's no justify-self for flexbox in real CSS. There is a justify-self CSS property, but it doesn't do anything in flexbox layouts. You can see in the spec at https://drafts.csswg.org/css-align-3/#overview that justify-self is defined to apply to:

block-level boxes, absolutely-positioned boxes, and grid items

which notably doesn't include "flex items".

Okay, but why is this the case in CSS? MDN offers an explanation that you may or may not find satisfactory:

There is no justify-self in Flexbox

On the main axis Flexbox deals with our content as a group. The amount of space required to lay out the items is calculated, and the leftover space is then available for distribution. The justify-content property controls how that leftover space is used. Set justify-content: flex-end and the extra space is placed before the items, justify-content: space-around and it is placed either side of the item in that dimension, etc.

This means that a justify-self property does not make sense in Flexbox as we are always dealing with moving the entire group of items around.

On the cross axis align-self makes sense as we potentially have additional space in the flex container in that dimension, in which a single item can be moved to the start and end.

There's clearly some sense to this. It's always meaningful and coherent to put alignSelf: 'center' on a flex item to ask for it to be centered on the cross axis. But what would it mean to, for instance, put justifySelf: 'center' on a flex item, to ask for it to be centered on the main axis? How is that supposed to be handled if previous flex items have already filled more than half of the space along that axis?

Margins provide a fine solution for cases like yours. justifySelf, on the other hand, can't reasonably exist for flexbox, because the justifyContent values specify how to distribute flex items, and a little thought about what it would mean to instead apply them to individually specified items reveals that doing so is basically incoherent.

Flexbox justify-self property - CSS, The CSS justify-self property sets the way a box is justified inside its In flexbox layouts, this keyword has no meaning as this property is  This means that a justify-self property does not make sense in Flexbox as we are always dealing with moving the entire group of items around. On the cross axis align-self makes sense as we potentially have additional space in the flex container in that dimension, in which a single item can be moved to the start and end.


You can take a look at Flex Docs!

Adding flexDirection to a component's style determines the primary axis of its layout.

and then:

Adding alignItems to a component's style determines the alignment of children along the secondary axis (if the primary axis is row, then the secondary is column, and vice versa).

So your desired code will be:

import React, { Component } from 'react';
import { AppRegistry, View } from 'react-native';

export default class AlignItemsBasics extends Component {
  render() {
    return (
      <View style={{
        flex: 1,
        flexDirection: 'column',
        justifyContent: 'center',
        alignItems: 'center',
      }}>
        <View style={{width: 50, height: 50, backgroundColor: 'powderblue'}} />
        <View style={{width: 50, height: 50, backgroundColor: 'skyblue'}} />
        <View style={{width: 50, height: 50, backgroundColor: 'steelblue'}} />
      </View>
    );
  }
};

// skip this line if using Create React Native App
AppRegistry.registerComponent('AwesomeProject', () => AlignItemsBasics);
UPDATE

If you mean something like this image:

Then I'll suggest you this:

import React, { Component } from "react";
import { View, StyleSheet } from "react-native";

class Playground extends Component {
  render() {
    return (
      <View style={styles.container}>
        <View style={styles.boxes} />
        <View style={styles.boxes} />
        <View
          style={[
            styles.boxes,
            {
              backgroundColor: "crimson",
              position: "absolute",
              right: 0
            }
          ]}
        />
      </View>
    );
  }
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    flexDirection: "row",
    justifyContent: "flex-start",
    alignItems: "center"
  },
  boxes: {
    width: 50,
    height: 50,
    marginLeft: 1, // to separate each box!
    backgroundColor: "steelblue"
  }
});

export default Playground;

As far as i know with these props, it's the best way!

Layout with Flexbox · React Native, As a newbie in React Native I found myself time after time going back to all the different props. justify vs align , relative vs absolute , items vs content , It was But mixing and matching all of the properties above will give you almost any On Medium, smart voices and original ideas take center stage - with no ads in sight. The docs of React Native Text component about the style attribute says: textAlign enum ('auto', 'left', 'right', 'center', 'justify') : Specifies text alignment. The value 'justify' is only supported on iOS and fallbacks to left on Android. A workaround for this limitation is to use a React Native WebView component.


There is an easy way to do this without absolute positioning that works exactly how you'd expect with all items of varying heights lining up on the y-axis appropriately.

<View style={{ flexDirection: 'row', alignItems: 'center' }}>
  <View style={{ backgroundColor: 'green', height: 50, width: 50 }} />
  <Text style={{flex: 1}}> text in here because why not!</Text>
  <View style={{ backgroundColor: 'yellow', width: 30, height: 30 }} />
</View>

justify-self, Available options are flex-start,flex-end,space-between,space-around,center. changed… Adding justifyContent to a component's style determines the distribution of Routing in React Native apps and how to configure your project with On Medium, smart voices and original ideas take center stage - with no ads in sight. React Native justifyContent style Explained With Example Tutorial. The justifyContent in a component’s styles determines the alignment of Children View along with Primary Axis(Default Flex-direction). If your primary axis is flex-direction is column then the justifyContent will set all the children in Vertical format.


The Full React Native Layout Cheat Sheet - Wix Engineering, <View style={{ flex: 1, flexDirection: 'row', justifyContent: 'space-between' }}>. You can see it yourself from the snapshot test. In React Native flex does not work the same way that it does in CSS. flex is a number @jacobp100 I propose we just add some notes to the React Native section of the website. For react you just need basic knowledge of CSS and HTML. Native Approach React can be used to create mobile applications (React Native). And React is a diehard fan of reusability, meaning extensive code reusability is supported. So at the same time we can make IOS, Android and Web application.


Flex-Direction, Justify-Content, Align-Items - dhara patel, Each view's flexDirection is set to colum by default but setting it to 'row' will Mastering these simple Flexbox recipes will make you a React Native UI master in no time justifyContent supports flex-start , center , flex-end , space-around , and  Text properties that could inherit from outside of the props would break this isolation. (Implementor) The implementation of React Native is also simplified. We do not need to have a fontFamily field on every single element, and we do not need to potentially traverse the tree up to the root every time we display a text node. The style


Weird behaviour of a styled.View inside a react-native ListView , It aims to give us an easy way to reason about, align and distribute HTML Style. The benefit of React and React Native is that if you understand how to build a to build a React Native app for Android. text-align does not control the alignment of width or height (depending on flexDirection) wont work. react : 16. justify-self​  Why did Native Americans react violently to living on reservations? They did not want to lose their lands and traditions, and life on reservations was hard. Why couldn't strong leaders like Crazy Horse, Sitting Bull, and Chief Joseph save their people's lands?