react-native-autoheight-webview/demo/explorer.js

'use strict'

import React, {
    Component,
    PropTypes
} from 'react';

import {
    ScrollView,
    StyleSheet,
    Text,
    TouchableOpacity,
    View
} from 'react-native';

import AutoHeightWebView from 'react-native-autoheight-webview';

export default class Explorer extends Component {
    constructor(props) {
        super(props);
        this.html0 = `<p style="font-weight: 400;font-style: normal;font-size: 21px;line-height: 1.58;letter-spacing: -.003em;">Tags are great for describing the essence of your story in a single word or phrase, but stories are rarely about a single thing. <span style="background-color: transparent !important;background-image: linear-gradient(to bottom, rgba(146, 249, 190, 1), rgba(146, 249, 190, 1));">If I pen a story about moving across the country to start a new job in a car with my husband, two cats, a dog, and a tarantula, I wouldn’t only tag the piece with “moving”. I’d also use the tags “pets”, “marriage”, “career change”, and “travel tips”.</span></p>`;
        this.html1 = `<p>Tags are great for describing the essence of your story in a single word or phrase, but stories are rarely about a single thing. <span>If I pen a story about moving across the country to start a new job in a car with my husband, two cats, a dog, and a tarantula, I wouldn’t only tag the piece with “moving”. I’d also use the tags “pets”, “marriage”, “career change”, and “travel tips”.</span></p>`;
        this.script0 = '';
        this.script1 = `document.body.style.background = 'lightyellow';`;
        this.changeSource = this.changeSource.bind(this);
        this.changeScript = this.changeScript.bind(this);
        this.state = {
            html: this.html0,
            script: this.script0,
            height: 0
        };
    }

    changeSource() {
        this.setState(prevState => ({
            html: prevState.html === this.html0 ? this.html1 : this.html0
        }));
    }

    changeScript() {
        this.changeSource();
        this.setState(prevState => ({
            script: prevState.script === this.script0 ? this.script1 : this.script0
        }));
    }

    render() {
        return (
            <ScrollView
                style={{
                    backgroundColor: 'lightyellow'
                }}
                contentContainerStyle={{
                    justifyContent: 'center',
                    alignItems: 'center'
                }}>
                <AutoHeightWebView
                    onHeightUpdated={height => this.setState({ height })}
                    source={{ html: this.state.html }}
                    customScript={this.state.script} />
                <TouchableOpacity
                    onPress={this.changeSource}
                    style={Styles.button}>
                    <Text>change source</Text>
                </TouchableOpacity>
                <TouchableOpacity
                    onPress={this.changeScript}
                    style={Styles.button}>
                    <Text>change script (have to change source to reload on android)</Text>
                </TouchableOpacity>
                <Text style={{ padding: 5 }}>
                    {this.state.height}
                </Text>
            </ScrollView>
        );
    }
}

const Styles = StyleSheet.create({
    button: {
        marginTop: 15,
        backgroundColor: 'aliceblue',
        borderRadius: 5,
        padding: 5
    }
});