Render local html file in React Native - html

Question

I run React Native using Expo for android and I'm trying to render html file (it shows a map image) in local directory, but it doesn't work properly.
I followed several references, installed webview dependencies in expo and npm both.
The problem is that the result is just html code view, not a map image
Please see my result below:
And my react native code is this (very simple) :
import React, { Component } from 'react';
import { WebView } from 'react-native-webview';
const testHtml = require('./arcgis/arc1.html');
export default function App() {
return (
<WebView source={testHtml} startInLoadingState
scalesPageToFit
javaScriptEnabled
style={{ flex: 1 }}/>
);
}
When I compile the html file in online html website, it appears like this:
left - html code, right - result
This html file is just sample file from official gis website so my react native code must be wrong I guess.
How can I fix the problem ?
Thanks.

Answer 1

You have to use this module for rendering html.
https://github.com/archriss/react-native-render-html
Edit: Instead of using HTML file store your HTML into a .js file and export like this
export const MyHTML =
`<p>Here is an <em>ul</em> tag</p>
<ul>
<li>Easy</li>
<li>Peasy</li>
<li><div style="background-color:red;width:50px;height:50px;"></div></li>
<li>Lemon</li>
<li>Squeezy</li>
</ul>
<br />
<p>Here is an <em>ol</em> tag</p>
<ol>
<li>Sneaky</li>
<li>Beaky</li>
<li>Like</li>
</ol>
`;
and then pass MyHTML to yoru HTML renderer.

Answer 2

If you are using react-native CLI, you have to place the local HTML file in specific folders native to ios and android. Meaning you will have two indez.html file: see - https://aboutreact.com/load-local-html-file-url-using-react-native-webview/
For Expo, I used this method:
import { StyleSheet, Text, View } from "react-native";
import { WebView } from "react-native-webview";
import React from "react";
const MyHtmlFile = `
<p>Here is an <em>ul</em> tag</p>
<ul>
<li>Easy</li>
<li>Peasy</li>
<li><div style="background-color:red;width:50px;height:50px;"></div></li>
<li>Lemon</li>
<li>Squeezy</li>
</ul>
<br />
<p>Here is an <em>ol</em> tag</p>
<ol>
<li>Sneaky</li>
<li>Beaky</li>
<li>Like</li>
</ol>
`;
const Screen = () => {
return (
<WebView
originWhitelist={["*"]}
source={{
html: MyHtmlFile,
}}
/>
);
};
export default Screen;
const styles = StyleSheet.create({});

Answer 3

You can use react-native-webview for rendering html file.
Here is an example
import React, { Component } from 'react';
import { WebView } from 'react-native-webview';
const myHtmlFile = require("./my-asset-folder/local-site.html");
class MyWeb extends Component {
render() {
return (
<WebView source={myHtmlFile} />
);
}
}