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How to align this text in the center of its parent flex item?

I have some react-native code, where I have a pop-up modal. I created it using flex, but for some reason the text will not vertically align. I solved it using top = 30%, but then my touchable opacities(surrounding the texts) do not span all of the free space available. And I feel this is a hacky solution.
Curious if there is a better one, to automatically align the text vertically and make sure the touchable opacities take up the free space available to them?
Below is my code:
<Modal
isVisible={confirmationVisible}
onBackdropPress={() => toggleConfirmation()}
style={styles.confirmationModal}
>
<Text style={styles.confirmationTitle}>Would you like to add a beacon to {assetName}?</Text>
<TouchableOpacity style={styles.confirmationContainer} onPress={() => navigateAway("AddAssetScreenFinish")}>
<Text style={styles.confirmationText}>No, I'm done</Text>
</TouchableOpacity>
<TouchableOpacity style={styles.confirmationContainer} onPress={() => navigateAway("AddBeaconExistingScreen")}>
<Text style={styles.confirmationText}>Yes, an existing Beacon</Text>
</TouchableOpacity>
<TouchableOpacity style={styles.confirmationContainer} onPress={() => navigateAway("AddBeaconScreen")}>
<Text style={styles.confirmationText}>Yes, a new Beacon</Text>
</TouchableOpacity>
</Modal>
Below is my styling:
confirmationModal: {
flex: 0.3,
width: "60%",
alignItems: "center",
justifyContent: "space-evenly",
backgroundColor: "white",
marginTop: "auto",
marginBottom: "auto",
marginLeft: "auto",
marginRight: "auto",
borderRadius: 8
},
confirmationTitle: {
fontWeight: "bold",
textAlign: "center",
margin: 5,
paddingLeft: 20,
paddingRight: 20
},
confirmationContainer: {
borderTopColor: "lightgrey",
borderTopWidth: 1,
width: "100%"
},
confirmationText: {
textAlign: "center",
color: COLORS.purple
},
Edit:
using this modal if curious
Also, have tried justifyContent on confirmationContainer but it does not work, unsure why
Edit2:
Got the solution. Seems flex is scaling the height and width had to be set manually for my text element. Removing the justifyContent and alignItems from a parent container, I was able to use textAlignVertical for my title and scale titleContainer vs touchableContainers with flex 2 and flex 1 respectively. Not sure what is going on, but the touchable now scales the whole free space and the text is aligned vertically...used AnthonyDev220's solution and reworked it so marked him as best answer, updated styles jsx did not change:
confirmationModal: {
flex: 0.3,
width: "60%",
backgroundColor: "white",
marginTop: "auto",
marginBottom: "auto",
marginLeft: "auto",
marginRight: "auto",
borderRadius: 8
},
confirmationTitle: {
fontWeight: "bold",
textAlign: "center",
textAlignVertical: "center",
flex: 2,
paddingLeft: 20,
paddingRight: 20
},
confirmationContainer: {
borderTopColor: "lightgrey",
borderTopWidth: 1,
flex: 1,
width: "100%"
},
confirmationText: {
marginTop: "auto",
marginBottom: "auto",
textAlign: "center",
color: COLORS.purple
},

You could try adding textAlignVertical: "center" to your confirmationText
or
Try wrapping your component inside a component and then style your componenet.
<TouchableOpacity style={styles.confirmationContainer} onPress={() => navigateAway("AddAssetScreenFinish")}>
<View style={{flex:1,justifyContent: "center",alignItems: "center"}}>
<Text style={styles.confirmationText}>No, I'm done</Text>
</TouchableOpacity>
</View>
same for your other two <Text> components.

confirmationContainer: {
display: flex,
justifyContent: center,
alignItems:center,
borderTopColor: "lightgrey",
borderTopWidth: 1,
width: "100%"
}

How to build progress bar with circle at the end of bar?

I need to build horizontal progress bar with circle at the end in react js, as shown in picture. I am able to build progress bar with custom "%", now I want to add circle at the end with some text inside.
code for progress bar with custom "%":
codesandbox

Change progress bar component to:
<div style={containerStyles}>
<div style={fillerStyles}>
<div style={circleStyles}>{circleText}</div>
</div>
</div>
And add this styles to the component:
const circleStyles = {
display: "flex",
position: "absolute",
right: "0",
width: "50px",
height: "50px",
background: "blue",
top: "-60%",
borderRadius: "50px",
justifyContent: "center",
alignItems: "center",
color: "white"
};
And here's the App.js:
export default function App() {
return (
<div className="App">
<ProgressBar
bgcolor={item.bgcolor}
completed={item.completed}
circleText={"100%"}
/>
</div>
);
}

add a span under container div and put this style to it
<div style={containerStyles}>
<div style={fillerStyles}></div>
<span style={circleStyle}>{text}</span>
</div>
style
const circleStyle = {
height: 40,
width: 40,
position: "absolute",
right: 0,
backgroundColor: bgcolor,
borderRadius: "50%",
top: -10,
display: "flex",
alignItems: "center",
justifyContent: "center",
color: "white"
};
and then put this to containerStyle
position: "relative",

Move react component to another component

I'm working on a react. The code below is an example. ArrayExample is mapped and returned to the div component. Whenever I click the mapped div component, I want to change the value of the top of div (position: 'absolute') and place it on the right side according to the mapped div topBorder. Is there a way? I want to move it smoothly like an animation.
import React from "react";
const sample = () => {
const arrayExample = ["AAAA", "BBBB", "CCCC"];
return (
<div
style={{
display: "flex",
flexDirection: "column",
width: "100%",
height: "500px",
alignItems: "center",
justifyContent: "center",
backgroundColor: "#f3f3f3",
}}
>
{arrayExample.map((v, i) => {
return (
<div
style={{
width: "50%",
padding: 50,
border: "1px solid black",
marginTop: 15,
}}
onClick={() => {
console.log("Event!")
}}
>
{v}
</div>
);
})}
<div style={{position: 'absolute', top: 70, right: '22%', backgroundColor: "#4285F4", width: 50, height: 150, borderRadius: 5}}>
moving screen(I want to Change top value)
</div>
</div>
);
};
export default sample;

On click of the item div, you need to figure out the distance of that div from the top, and then change the top css property of your right div according to that. To find this distance you can use offsetTop property. For animation you can use transition property. Here is the code:
import React, { useRef } from "react";
const Sample = () => {
const arrayExample = ["AAAA", "BBBB", "CCCC"];
const rightDiv = useRef();
const itemClickHandler = (i) => {
const newTopHeight = document.getElementById("container").children[i].offsetTop;
rightDiv.current.style.top = newTopHeight + 'px';
}
return (
<div
id="container"
style={{
display: "flex",
flexDirection: "column",
width: "100%",
height: "500px",
alignItems: "center",
justifyContent: "center",
backgroundColor: "#f3f3f3",
}}
>
{arrayExample.map((v, i) => {
return (
<div
key={i}
style={{
width: "50%",
padding: 50,
border: "1px solid black",
marginTop: 15,
}}
onClick={() => itemClickHandler(i)}
>
{v}
</div>
);
})}
<div
ref={rightDiv}
style={{
position: 'absolute',
top: 70,
right: '22%',
backgroundColor: "#4285F4",
width: 50,
height: 150,
borderRadius: 5,
transition: "top 0.5s ease-in-out"
}}>
moving screen(I want to Change top value)
</div>
</div>
);
};
export default Sample;
You can see this in action here: https://codesandbox.io/s/thirsty-curie-7mskj

In your click handler you can get the current position of the clicked div in px, you can easily google how to do this this (relative to the page, not the viewport). I would suggest storing this value in state, call it something like activeItemOffsetTop, then just set top to the current state

React Native line-through not centered

The strike through is not vertically centered.
My code is like this:
<Text style={{textDecorationLine: 'line-through', alignSelf: 'center', fontFamily: constants.FONTBOLD, color: constants.ORANGE, fontSize: 16}}>

well, we couldn't actually find a solution with the textDecoration property. But we did a work-around by placing absolutely a View. Like this (pseudo code)
const styles = StyleSheet.create({
parent: {
position: relative,
},
halfLine: {
width: "100%",
top: 0,
height: "35%",
borderBottomColor: "black",
borderBottomWidth: 1,
position: "absolute",
},
<View class={styles.parent}>
<View class={styles.halfLine} />
<Copy> $100 </Copy>
</View>```

zIndex doesn't work in component

I have a blue header which i want to take part of that on another view with an animate event. but before i execute animate function i set the zIndexes manually and knew it doesn't work at all!! means nothing will change when i give 1 or 100 or other value to zIndex property of my components :(
<View style={{ flex: 1 }}>
<Animated.View style={{
position: 'absolute',
top: 0,
left: 0, right: 0,
backgroundColor: 'lightskyblue',
height: headerHight,
zIndex: 1,//Look here <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
alignItems: 'center',
}}>
<Animated.View style={{ position: 'absolute', top: titleTop }}>
<Text style={{ fontWeight: 'bold', fontSize: 26, paddingLeft: 10 }}>Iman Salehi</Text>
</Animated.View>
</Animated.View>
<ScrollView style={{ flex: 1 }}
scrollEventThrottle={16}
onScroll={Animated.event(
[{ nativeEvent: { contentOffset: { y: this.state.scrollY } } }]
)}>
<Animated.View style={{
height: profileImageHight,
width: profileImageHight,
borderRadius: PROFILE_IMAGE_MAX_HIGHT / 2,
borderColor: 'white',
borderWidth: 3,
overflow: 'hidden',
marginTop: profileImageMarginTop,
zIndex:0, //Look here <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
marginLeft: 10,
}}>
<Image source={require('./assets/avatar.jpg')} style={{ flex: 1, width: null, height: null}} />
</Animated.View>
<Text style={{ fontWeight: 'bold', fontSize: 26, paddingLeft: 10 }}>Iman Salehi</Text>
<View style={{ height: 1000 }}></View>
</ScrollView>
</View>
like you see above: there are two components which has zIndex. so taking one which has zIndex:1 on the other is expected but there is no change bout them in run time.

Try elevation with zIndex and absolute position.
Apply below style on component which you want to show on front layer
style={{ position: 'absolute', elevation: 100,zIndex:100, //other style }}
Let me know if still facing issue

Try using elevation, that might help you to differentiate between the views.