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JavaScript Catching Errors with Error Boundaries

Victor Cuc
Victor Cuc
7,281 Points
Posted by Victor Cuc
Victor Cuc
7,281 Points

What does return (this.props.children); do?

What does return (this.props.children); do in:

import React, { Component } from 'react';

export default class ErrorBoundary extends Component {
  state = {
    hasError: false
  }

  componentDidCatch() {
    this.setState({ hasError: true });
  }

  render() {
    if (this.state.hasError) {
      return <h2>Oh no! Something went wrong.</h2>
    }
    return (this.props.children);
  }
}

1 Answer

Jordan Wren
Jordan Wren
30,940 Points
Jordan Wren
Jordan Wren
30,940 Points

What it does is return its children. In the case of this example, we wrapped the <ErrorBoundary> component around the <StudentForm> component, making the <StudentForm> component a child of <ErrorBoundary>. Therefore, when an error does not occur, the <StudentForm> component will be rendered.