React

import React, { Component } from 'react';
import { View, TextInput, ListView, Button } from 'react-native';

export default class Github extends Component {
	constructor(props) {
		super(props);
		const ds = new ListView.DataSource({rowHasChanged: (r1, r2) => r1 !== r2});
		this.state = {
			text: '',
			error: false,
			dataSource: ds.cloneWithRows()
		}
		this.handleChange = this.handleChange.bind(this);
	}
	fetchRepos(e) {
		this.state.dataSource = getUserRepos(this.state.text).then();
	}

	render() {
		return() {
			<View>
				<TextInput
					onChangeText={(text) => this.setState({text})}
					placeholder={'Username'}
					value={this.state.text}
				/>
				<Button
					onPress={fetchRepos}
				>
					Fetch
				</Button>
				<ListView
					dataSource={this.state.dataSource}
					renderRow={(rowData) => <Text>{rowData}</Text>}
				/>
			</View>
		}
	}
}

export const getUserRepos = (name) => {
	let username = name.toLowerCase().trim();
	const URL = `https://api.github.com/users/${username}/repos?sort=updated`;
	return fetch(URL).then((res) => res.json());
}