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03-nested-elements.html
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03-nested-elements.html
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<!doctype html>
<title>03 Nested Elements - React From Zero</title>
<script src="https://unpkg.com/react@16.4.0/umd/react.development.js"></script>
<script src="https://unpkg.com/react-dom@16.4.0/umd/react-dom.development.js"></script>
<script src="https://unpkg.com/@babel/standalone/babel.min.js"></script>
<div id="app"></div>
<script type="text/babel">
// Elements can be nested, this results in nested React.createElement
// calls. Writing this without JSX would be pretty tedious
var reactElement = (
<div className="abc">
<h1>Hello</h1>
<h2>world</h2>
</div>
);
// they can also, like mentioned in lesson 2, contain JavaScript in {}
var myClass = "abc";
function myText() {
return "world";
}
// JavaScript insertion has the same syntax in attributes as in normal
// text or elements
reactElement = (
<div className={myClass}>
<h1>Hello {10 * 10}</h1>
<h2>{myText()}</h2>
</div>
);
// this JavaScript can contain elements too
var nestedElement = <h2>world</h2>;
reactElement = (
<div>
<h1>Hello</h1>
{nestedElement}
</div>
);
// it is also possible to "spread" an object as properties
var properties = {
className: "abc",
onClick: function() {
alert("click");
}
};
reactElement = (
<div {...properties}>
<h1>Hello</h1>
<h2>world</h2>
</div>
);
var renderTarget = document.getElementById("app");
ReactDOM.render(reactElement, renderTarget);
</script>