React Native Text Style Props Tutorial

When “React Native Text Style Props Tutorial” moves through design, development and browser testing, this practical overview can clarify hand-offs and time spent on revisions while leaving code quality, accessibility and released behaviour as the real measures of success.

For API changes, browser support and current usage patterns, compare the snippet with the React Native project before adopting it in production.

Hi Guys,

Today, I will learn you how to use Text Style Props in react native. You can easily use Text Style Props in react native.Here, I will give you full example for simply display Text Style Props using react native as bellow.

The following example shows how different properties can affect or shape a React Native Text Style. Specifies font weight. The values 'normal' and 'bold' are supported for most fonts. Not all fonts have a variant for each of the numeric values, in that case the closest one is chosen.

Step 1 - Create project

In the first step Run the following command for create project.

expo init TextStylePropsApp 

Step 2 - App.js

In this step, You will open App.js file and put the code.

import React, { useState } from "react";
import { FlatList, Platform, ScrollView, Slider, StatusBar, StyleSheet, Switch, Text, TouchableWithoutFeedback, View } from "react-native";
const fontStyles = ["normal", "italic"];
const fontVariants = [
  undefined,
  "small-caps",
  "oldstyle-nums",
  "lining-nums",
  "tabular-nums",
  "proportional-nums"
];
const fontWeights = [
  "normal",
  "bold",
  "100",
  "200",
  "300",
  "400",
  "500",
  "600",
  "700",
  "800",
  "900"
];
const textAlignments = ["auto", "left", "right", "center", "justify"];
const textDecorationLines = [
  "none",
  "underline",
  "line-through",
  "underline line-through"
];
const textDecorationStyles = ["solid", "double", "dotted", "dashed"];
const textTransformations = ["none", "uppercase", "lowercase", "capitalize"];
const textAlignmentsVertical = ["auto", "top", "bottom", "center"];
const writingDirections = ["auto", "ltr", "rtl"];
const App = () => {
  const [fontSize, setFontSize] = useState(10);
  const [fontStyleIdx, setFontStyleIdx] = useState(0);
  const [fontWeightIdx, setFontWeightIdx] = useState(0);
  const [lineHeight, setLineHeight] = useState(10);
  const [textAlignIdx, setTextAlignIdx] = useState(0);
  const [textDecorationLineIdx, setTextDecorationLineIdx] = useState(0);
  const [includeFontPadding, setIncludeFontPadding] = useState(false);
  const [textVerticalAlignIdx, setTextVerticalAlignIdx] = useState(0);
  const [fontVariantIdx, setFontVariantIdx] = useState(0);
  const [letterSpacing, setLetterSpacing] = useState(0);
  const [textDecorationStyleIdx, setTextDecorationStyleIdx] = useState(0);
  const [textTransformIdx, setTextTransformIdx] = useState(0);
  const [writingDirectionIdx, setWritingDirectionIdx] = useState(0);
  const [textShadowRadius, setTextShadowRadius] = useState(0);
  const [textShadowOffset, setTextShadowOffset] = useState({
    height: 0,
    width: 0
  });
  return (
    <View style={styles.container}>
      <Text
        style={[
          styles.paragraph,
          {
            fontSize,
            fontStyle: fontStyles[fontStyleIdx],
            fontWeight: fontWeights[fontWeightIdx],
            lineHeight,
            textAlign: textAlignments[textAlignIdx],
            textDecorationLine: textDecorationLines[textDecorationLineIdx],
            textTransform: textTransformations[textTransformIdx],
            textAlignVertical: textAlignmentsVertical[textVerticalAlignIdx],
            fontVariant: [fontVariants[fontVariantIdx]],
            letterSpacing,
            includeFontPadding,
            textDecorationStyle: textDecorationStyles[textDecorationStyleIdx],
            writingDirection: writingDirections[writingDirectionIdx],
            textShadowOffset,
            textShadowRadius
          }
        ]}
      >
        Lorem Ipsum is simply dummy text of the printing and typesetting
        industry. 112 Likes
      </Text>
      <ScrollView>
        <View>
          <Text>Common platform properties</Text>
          <CustomSlider
            label="Text Shadow Offset - Height"
            value={textShadowOffset.height}
            minimumValue={-40}
            maximumValue={40}
            handleValueChange={val =>
              setTextShadowOffset(prev => ({ ...prev, height: val }))
            }
          />
          <CustomSlider
            label="Text Shadow Offset - Width"
            value={textShadowOffset.width}
            minimumValue={-40}
            maximumValue={40}
            handleValueChange={val =>
              setTextShadowOffset(prev => ({ ...prev, width: val }))
            }
          />
          <CustomSlider
            label="Font Size"
            value={fontSize}
            maximumValue={40}
            handleValueChange={setFontSize}
          />
          <CustomPicker
            label="Font Style"
            data={fontStyles}
            currentIndex={fontStyleIdx}
            onSelected={setFontStyleIdx}
          />
          <CustomPicker
            label="Font Weight"
            data={fontWeights}
            currentIndex={fontWeightIdx}
            onSelected={setFontWeightIdx}
          />
          <CustomSlider
            label="Line Height"
            value={lineHeight}
            minimumValue={10}
            maximumValue={50}
            handleValueChange={setLineHeight}
          />
          <CustomPicker
            label="Text Align"
            data={textAlignments}
            currentIndex={textAlignIdx}
            onSelected={setTextAlignIdx}
          />
          <CustomPicker
            label="Text Decoration Line"
            data={textDecorationLines}
            currentIndex={textDecorationLineIdx}
            onSelected={setTextDecorationLineIdx}
          />
          <CustomSlider
            label="Text Shadow Radius"
            value={textShadowRadius}
            handleValueChange={setTextShadowRadius}
          />
          <CustomPicker
            label="Font Variant"
            data={fontVariants}
            currentIndex={fontVariantIdx}
            onSelected={setFontVariantIdx}
          />
          <CustomSlider
            label="Letter Spacing"
            step={0.1}
            value={letterSpacing}
            handleValueChange={setLetterSpacing}
          />
          <CustomPicker
            label="Text Transform"
            data={textTransformations}
            currentIndex={textTransformIdx}
            onSelected={setTextTransformIdx}
          />
        </View>
        {Platform.OS === "android" && (
          <View style={styles.platformContainer}>
            <Text style={styles.platformContainerTitle}>
              Android only properties
            </Text>
            <CustomPicker
              label="Text Vertical Align"
              data={textAlignmentsVertical}
              currentIndex={textVerticalAlignIdx}
              onSelected={setTextVerticalAlignIdx}
            />
            <CustomSwitch
              label="Include Font Padding"
              handleValueChange={setIncludeFontPadding}
              value={includeFontPadding}
            />
          </View>
        )}
        {Platform.OS === "ios" && (
          <View style={styles.platformContainer}>
            <Text style={styles.platformContainerTitle}>
              iOS only properties
            </Text>
            <CustomPicker
              label="Text Decoration Style"
              data={textDecorationStyles}
              currentIndex={textDecorationStyleIdx}
              onSelected={setTextDecorationStyleIdx}
            />
            <CustomPicker
              label="Writing Direction"
              data={writingDirections}
              currentIndex={writingDirectionIdx}
              onSelected={setWritingDirectionIdx}
            />
          </View>
        )}
      </ScrollView>
    </View>
  );
}
const CustomSwitch = ({ label, handleValueChange, value }) => {
  return (
    <>
      <Text style={styles.title}>{label}</Text>
      <View style={{ alignItems: "flex-start" }}>
        <Switch
          trackColor={{ false: "#767577", true: "#DAA520" }}
          thumbColor={value ? "#DAA520" : "#f4f3f4"}
          onValueChange={handleValueChange}
          value={value}
        />
      </View>
    </>
  );
}
const CustomSlider = ({
  label,
  handleValueChange,
  step = 1,
  minimumValue = 0,
  maximumValue = 10,
  value
}) => {
  return (
    <>
      {label && (
        <Text style={styles.title}>{`${label} (${value.toFixed(2)})`}</Text>
      )}
      <View style={styles.wrapperHorizontal}>
        <Slider
          thumbTintColor="#DAA520"
          minimumTrackTintColor="#DAA520"
          minimumValue={minimumValue}
          maximumValue={maximumValue}
          step={step}
          onValueChange={handleValueChange}
          value={value}
        />
      </View>
    </>
  );
}
const CustomPicker = ({ label, data, currentIndex, onSelected }) => {
  return (
    <>
      <Text style={styles.title}>{label}</Text>
      <View style={styles.wrapperHorizontal}>
        <FlatList
          bounces
          horizontal
          data={data}
          keyExtractor={(item, idx) => String(item)}
          renderItem={({ item, index }) => {
            const selected = index === currentIndex;
            return (
              <TouchableWithoutFeedback onPress={() => onSelected(index)}>
                <View
                  style={[
                    styles.itemStyleHorizontal,
                    selected && styles.itemSelectedStyleHorizontal
                  ]}
                >
                  <Text
                    style={{
                      textAlign: "center",
                      color: selected ? "black" : "grey",
                      fontWeight: selected ? "bold" : "normal"
                    }}
                  >
                    {item + ""}
                  </Text>
                </View>
              </TouchableWithoutFeedback>
            );
          }}
        />
      </View>
    </>
  );
}
const styles = StyleSheet.create({
  container: {
    flex: 1,
    paddingTop: StatusBar.currentHeight,
    backgroundColor: "#ecf0f1",
    padding: 8
  },
  paragraph: {
    color: "black",
    textDecorationColor: "yellow",
    textShadowColor: "red",
    textShadowRadius: 1,
    margin: 24
  },
  wrapperHorizontal: {
    height: 54,
    justifyContent: "center",
    color: "black",
    marginBottom: 12
  },
  itemStyleHorizontal: {
    marginRight: 10,
    height: 50,
    padding: 8,
    borderWidth: 1,
    borderColor: "grey",
    borderRadius: 25,
    textAlign: "center",
    justifyContent: "center"
  },
  itemSelectedStyleHorizontal: {
    borderWidth: 2,
    borderColor: "#DAA520"
  },
  platformContainer: {
    marginTop: 8,
    borderTopWidth: 1
  },
  platformContainerTitle: {
    marginTop: 8
  },
  title: {
    fontWeight: "bold",
    marginVertical: 4
  }
});
export default App;

Step 3 - Run project

In the last step run your project using bellow command.

expo start

Output

It will help you...