The React component is also an Element, but it is only a larger granularity and contains more child elements.
Through the React component, some related elements are organized to form a reusable combination of elements with multiple members.
give an example
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>React Components</title>
</head>
<body>
<!-- Target Container -->
<div id="react-container"></div>
<!-- React Library & React DOM-->
<script src="https://unpkg.com/react@16/umd/react.development.js"></script>
<script src="https://unpkg.com/react-dom@16/umd/react-dom.development.js"></script>
<script>
class foodList extends React.Component {
render() {
return React.createElement("ul", {"className": "food-list"},
React.createElement("li", null, "1 apple"),
React.createElement("li", null, "1 banana"),
React.createElement("li", null, "2 oranges"),
React.createElement("li", null, "2 tomatos")
)
}
}
const list = React.createElement(foodList, null, null)
ReactDOM.render(
list,
document.getElementById('react-container')
)
</script>
</body>
</html>1. By inheritance React.Component Create component
class foodList extends React.Component {
}2. The render function must be included in the component
class foodList extends React.Component {
render() {
// Code to create the element
}
}
3. Returns a combination of multiple children of an element in render
render() {
return React.createElement(
"ul",
{"className": "food-list"},
React.createElement("li", null, "1 apple"),
React.createElement("li", null, "1 banana"),
React.createElement("li", null, "2 oranges"),
React.createElement("li", null, "2 tomatos")
)
}4. Create the list element by passing in the component foodList as a parameter through createElement
const list = React.createElement(foodList, null, null)5. Rendering
ReactDOM.render(
list,
document.getElementById('react-container')
)