Ways to access a DOM element beyond the confines of a React Native component

I am currently working on creating a React Native widget. This widget is made up of a single View, and my goal is to match the color of this View with another element on the page that has a specific class.

In a non-native React environment, I would typically achieve this using the following code:

componentDidMount(): void {
  const otherElement = document.querySelector(".classOfElementThatIsNotInMyReactNativeWidget") as HTMLElement;
  const thisComponent = this.Ref.current   // Reference to my widget obtained in the constructor using React.createRef();
  thisComponent.style.backgroundColor = otherElement.style.backgroundColor
}

However, in React Native, we don't have access to the document object or the ability to use getElementById.

So my question is, how can I accomplish this task in React Native instead?

(I am new to React Native, so any guidance is appreciated)

It's worth noting that I'm developing a widget for Mendix. This means that I only have direct access to the components within my widget and not the rest of the application. What I aim to do is to somehow "listen" to an external component beyond my widget.

Answer №1

One efficient approach would be to consolidate all your frequently used style values into a global file named theme.js. This file can contain all the common styles that are utilized across multiple components.

For example, in the theme.js file:

const theme = {
  primary: "rgba(255, 255, 0, 1)",
  error: "rgba(0, 255, 0, 1)",
  // additional color values
}

export default theme;

By defining these colors in one central location, you can easily access and apply them in other components like so:

import theme from '../../your-theme-file-path/theme.js;

const CustomComponent = () => (
  <View style={{ backgroundColor: theme.primary }}>
    <Text>Test</Text>
  </View>
)

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