Please,can somebody help to solve my problem with react.I am trying to render Hello World in div named header,but is shows nothing. I use localhost with server.js
ReactDOM.render(
<h1>Hello, world!</h1>,
document.getElementById('root')
);
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<script crossorigin src="https://unpkg.com/react#16/umd/react.development.js"></script>
<script crossorigin src="https://unpkg.com/react-dom#16/umd/react-dom.development.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-core/6.1.19/browser.min.js"></script>
</head>
<body>
<div id="root"></div>
<script type="text/babel" src="main.js"></script>
</body>
</html>
Link on image:
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errors:
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Mistake in dom render at first:
ReactDOM.render(
<Helloworld />,
document.getElementById('header')
);
3 ways of creating component. Dont need to use React.createClass(as in picture)
simple functional component that directly returns some jsx
const HelloWord = () => (
Hello word!!
)
normal funtional component
const HelloWord = () => {
return (
Hello word!!
)
}
Class component
class HelloWord extends React.Component {
render() {
return (
Hello word!!
)
}
}
and then use it like
render(<HelloWord />, document.querySelector('#root'));
Related
Trying to render a hello world but nothing is displayed on the page. There are no messages displayed in the console. What am I missing here? Thank you.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Hello World</title>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.3.1/react.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.3.1/react-dom.js"></script>
<scriptt src="https://unpkg.com/#babel/standalone/babel.min.js."></script>
</head>
<body>
<div id="app"></div>
<!-- Signal to babel that we would like it to handle the execution of the JS inside this script tag -->
<script type="text/babel">
class App extends React.Component {
render() {
return <h1>Hello from our app</h1>
}
}
var mount = document.querySelector('#app');
ReactDom.render(<App />, mount);
</script>
</body>
</html>
Your issue is that it is ReactDOM not ReactDom
class App extends React.Component {
render() {
return <h1>Hello from our app</h1>
}
}
var mount = document.querySelector('#app');
ReactDOM.render(<App />, mount);
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.6.3/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.6.3/umd/react-dom.production.min.js"></script>
<div id="app"></div>
I am at requirement that I have build some ReactJs components but need to use them inside Custom HTML tags( just like normal tags )
I am trying to create a "Board" component which just displays a text "In board...". Now I am trying to use this in my HTML page as .
My board.js file:
class Board extends React.Component {
render() {
return (
<div>
<div className="status"> In board.... </div>
</div>
);
}
}
My HTML page:
<html>
<head>
<script src="https://unpkg.com/react#16/umd/react.production.min.js" crossorigin></script>
<script src="https://unpkg.com/react-dom#16/umd/react-dom.production.min.js" crossorigin></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.21.1/babel.min.js"></script>
<script src="board.js" type="text/babel"></script>
</head>
<body>
<Board />
</body>
</html>
tag must be treated like an HTML tag and should load React component and display the text "In board....".
In your case, you have to create using customElements API. You can use customElements.define Method to create your own but name should be hyphen separated.
window.customElements.define('message-board',
class extends HTMLElement {
constructor() {
super();
this.innerHTML = '';
}
}
);
Below is the Working Example.
<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Board </title>
<script crossorigin src="https://unpkg.com/react#16/umd/react.development.js"></script>
<script crossorigin src="https://unpkg.com/react-dom#16/umd/react-dom.development.js"></script>
<script src="https://unpkg.com/babel-standalone#6/babel.min.js"></script>
<script>
window.customElements.define('message-board',
class extends HTMLElement {
constructor() {
super();
this.innerHTML = '';
}
});
</script>
<script type="text/babel">
class Board extends React.Component {
render() {
return (
<div>
<div className="status"> In board.... </div>
</div>
);
}
}
ReactDOM.render(
<Board />,
document.getElementsByTagName('message-board')[0]
);
</script>
<script>
</script>
</head>
<body>
<message-board />
</body>
</html>
Creating a custom element and rendering React component to this custom element can be done as below. Assuming "Board" is an React component.
window.customElements.define('message-board',
class extends HTMLElement {
constructor() {
super();
}
connectedCallback() {
ReactDOM.render(<Board />, this);
}
});
A working solution to convert a simple React component to HTML Custom element
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Board </title>
<script crossorigin src="https://unpkg.com/react#16/umd/react.development.js"></script>
<script crossorigin src="https://unpkg.com/react-dom#16/umd/react-dom.development.js"></script>
<script src="https://unpkg.com/babel-standalone#6/babel.min.js"></script>
<script crossorigin src="https://unpkg.com/#webcomponents/webcomponentsjs#2.0.3/custom-elements-es5-adapter.js"></script >
<script type="text/babel">
class Board extends React.Component {
render() {
return (
<div>
<div className="status"> In board.... </div>
</div>
);
}
}
window.customElements.define('message-board',
class extends HTMLElement {
constructor() {
super();
}
connectedCallback() {
ReactDOM.render(<Board />, this);
}
});
</script>
</head>
<body>
<div>
<message-board />
</div>
<div>
<message-board />
</div>
</body>
</html>
I am trying to get a react JS app to render in IE 11 but it is not rendering. I believe I have tried all of the suggestions from https://github.com/facebook/react/issues/8379. This example renders fine in other browsers for me.
Here is my html file
<head>
<meta http-equiv="X-UA-Compatible" content="IE=EDGE" />
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.13.3/JSXTransformer.js"> </script>
<script src="/static/js/test.jsx" type="text/jsx"></script>
</head>
<body>
<div id="root"></div>
<script type="text/jsx">
ReactDOM.render( < Test / > ,
document.getElementById('root')
);
</script>
</body>
</html>
and here is /static/js/test.jsx
class Test extends React.Component {
render() {
return ( < h1 > This is a test < /h1>);
}
One way to get it to work in IE11 is to import Babel to transpile ES6 to ES5 so it will work in IE11. Note that script type should be "text/babel" for both the inline script and the script import. Alternatively, you can transpile the javascript in the Babel repl and replace your code. Here's the html file
<!DOCTYPE html>
<html>
<head>
<title>First React App</title>
</head>
<body>
<div id="root"></div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.26.0/babel.min.js"></script>
<script
crossorigin
src="https://unpkg.com/react#16/umd/react.development.js"
></script>
<script
crossorigin
src="https://unpkg.com/react-dom#16/umd/react-dom.development.js"
></script>
<script src="./Test.js" type="text/babel"></script>
<script type="text/babel">
"use strict";
ReactDOM.render(<Test />, document.getElementById("root"));
</script>
</body>
</html>
here's Test.js
"use strict";
class Test extends React.Component {
render() {
return <h1>Hello World</h1>;
}
}
I am trying to use some pre-builtin react component from a library called ant design. Also, I would like to call the react and the component library through a cdnjs(don't wish to use webpack or else). How could I accomplish it? My approaches are like below and it's not working for me.
<!DOCTYPE html>
<html>
<head>
<title></title>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/antd/3.1.6/antd.min.css" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.4.2/react.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.4.2/react-dom.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.21.1/babel.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/antd/3.1.6/antd.min.js"></script>
</head>
<body>
<div id="root"></div>
<script type="text/babel">
import Button from 'antd/lib/button';
class Greeting extends React.Component {
render() {
return (<p><Button type="primary">Primary</Button></p>);
}
}
ReactDOM.render(
<Greeting />,
document.getElementById('root')
)
</script>
</body>
</html>
You don't need to import, because when you use prebuilt version, it's already injected into a global variable call 'antd' (just like React)
I also updated a little bit your scripts because for React you need . the umd version and antd needs the with locale version.
However, using prebuilt version is strongly NOT RECOMMENDED be careful.
<!DOCTYPE html>
<html>
<head>
<title></title>
<link rel="stylesheet" href="https://unpkg.com/antd/dist/antd.css" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.2.0/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.2.0/umd/react-dom.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.21.1/babel.min.js"></script>
<script src="https://unpkg.com/moment/min/moment-with-locales.js"></script>
<script src="https://unpkg.com/antd/dist/antd-with-locales.js"></script>
</head>
<body>
<div id="root"></div>
<script type="text/babel">
const { Button } = antd;
class Greeting extends React.Component {
render() {
return (<p><Button type="primary">Primary</Button></p>);
}
}
ReactDOM.render(
<Greeting />,
document.getElementById('root')
)
</script>
</body>
</html>
I am making a simple "Hello World" program in React.js. I am expecting "Hello World" to be printed in the body of the html.
index.html
<html>
<head>
<script src="http://fb.me/react-0.12.2.min.js"></script>
<script>
var HelloWorld = React.createClass({
render: function() {
return <div>Hello, world!</div>;
}
});
React.render(new HelloWorld(), document.body);
</script>
</head>
<body>
</body>
</html>
Error:
Uncaught SyntaxError: Unexpected token <
Can someone tell me where am I making a mistake?
Sol's answer covers why the simple hello app doesn't execute. The best practice on the latest React.js as of Jan 2017 is to import
<script src="https://unpkg.com/babel-standalone#6.26.0/babel.min.js"></script>
and have the script type set to text/babel.
With this, you can execute JSX normally e.g.
class Greeting extends React.Component {
constructor(props) {
super(props);
}
render() {
return (
<p>Hello, Universe</p>
);
}
}
What you're missing is including something that transforms the JSX into JS. You need to include the JSXTransformer.js. Also notice the React.render doesn't use document.body, it should be a dom element. Here's an example that should work:
<!DOCTYPE html>
<html>
<head>
<title>My First React Example</title>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.13.3/react.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.13.3/JSXTransformer.js"></script>
</head>
<body>
<div id="greeting-div"></div>
<script type="text/jsx">
var Greeting = React.createClass({
render: function() {
return (
<p>Hello, Universe</p>
)
}
});
React.render(
<Greeting/>,
document.getElementById('greeting-div')
);
</script>
</body>
</html>
i just thought that i would share my solution with everyone. I wanted to set up a simple project without all the npm, node guff, like the OP i was having problems, it took me three hours to figure out, below is my solution.
HTML:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Boy</title>
<link rel="stylesheet" type="text/css" href="css/app.css">
<script crossorigin src="https://unpkg.com/react#16/umd/react.production.min.js"></script>
<script crossorigin src="https://unpkg.com/react-dom#16/umd/react-dom.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.24.0/babel.js"></script>
<script type ="text/babel" src="js/app.js"></script>
</head>
<body>
<div id="root">Loading...</div>
</body>
</html>
The key is to include the appropriate script files from React and Babel. I am using an external app.js file, if you would like to do this then remember to include type ="text/babel".
Once done you can execute the hello world example from React. My app.js file:
ReactDOM.render(
<h1>Hello, world!</h1>,
document.getElementById('root')
);
CSS file:
#root {
color: skyblue;
}
I hope this helps.