typescript push in react native is a crucial step to enhance performance and optimize

I've been diving into TypeScript within the realm of React Native.

Oddly, when I translated a certain snippet to vanilla JavaScript, the application worked flawlessly. However, upon converting it back to TypeScript, an error message popped up stating

circleStyles.push(styles.circleCorrect);
is incorrect syntax. My assumption is that it might be related to data types, but I'm stumped on how to rectify this issue.

Any suggestions or insights on how to tackle this dilemma?

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

const screen = Dimensions.get("window");

const styles = StyleSheet.create({
  container: {
    position: "absolute",
    top: 0,
    bottom: 0,
    left: 0,
    right: 0,
    flex: 1,
    alignItems: "center",
    justifyContent: "center"
  },
  circle: {
    backgroundColor: "#ff4136",
    width: screen.width / 2,
    height: screen.width / 2,
    borderRadius: screen.width / 2,
    alignItems: "center",
    justifyContent: "center"
  },
  circleCorrect: {
    backgroundColor: "#28A125"
  },
  icon: {
    width: screen.width / 3
  }
});

export const Alert = ({ correct, visible }) => {
  if (!visible) return null;

  const icon = correct
    ? require("../assets/check.png")
    : require("../assets/close.png");

    const circleStyles = [styles.circle];

    if (correct) {
      **circleStyles.push(styles.circleCorrect);**
    }

  return (
    <View style={styles.container}>
      <View style={circleStyles}>
        <Image source={icon} style={styles.icon} resizeMode="contain" />
      </View>
    </View>
  )
}

Answer №1

The reason behind this behavior in TypeScript is due to its utilization of inference to automatically deduce types, resulting in the type of circleStyles being identified as an array of objects with matching fields to styles.circle.

Alternatively, you have the option of defining circleStyles as an array containing any type of value.

const circleStyles: any[] = [styles.circle];

However, I recommend specifying it more accurately by either creating an interface with optional properties or utilizing union types....

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