React Accordions:

Simple Colorless Accordion with Border using React

You can use this code to display the description of the buttons or when we need a simple and small accordion. This code indicates a button. By clicking on this button, the content will be written under its title. The thin, black border also surrounds the entire accordion. This accordion has received help from React.

Simple React Accordion

Colorless Accordion Code

React Accordion with Border

HTML Accordion Code

<!-- This script got from frontendfreecode.com -->
<a style="font-size: 8pt; text-decoration: none" target="_blank" href="http://frontendfreecode.com">Free Frontend</a>

class Collapse extends React.Component {
    constructor(props) {
        super(props);
        this.state = {
            isOpen: props.isOpen
        };
        this.setContentRef = r => this.contentEl = r;
        this.setContainerRef = r => this.containerEl = r;
        this.toggle = () => this.setState(s => ({ isOpen: !s.isOpen }));
    }
    componentWillReceiveProps(nextProps) {
        if (nextProps.isOpen !== this.props.isOpen && nextProps.isOpen !== this.state.isOpen) {
            this.toggle();
        }
    }
    componentDidMount() {
        this.updateHeight(this.state.isOpen);
    }
    componentDidUpdate() {
        this.updateHeight(this.state.isOpen);
    }
    updateHeight(isOpen) {
        if (isOpen) {
            this.containerEl.style.height = `${this.contentEl.scrollHeight}px`;
        } else {
            this.containerEl.style.height = '0px';
        }
    }
    render() {
        return /*#__PURE__*/(
            React.createElement("div", { style: mainStyle }, /*#__PURE__*/
                React.createElement("div", { onClick: this.toggle, style: toggleStyle }, "Click me to open/close"), /*#__PURE__*/
                React.createElement("div", { ref: this.setContainerRef, style: containerStyle }, /*#__PURE__*/
                    React.createElement("div", { ref: this.setContentRef, style: contentStyle }, "Inner content", /*#__PURE__*/
                        React.createElement("br", null), "Inner content", /*#__PURE__*/React.createElement("br", null), "Inner content", /*#__PURE__*/React.createElement("br", null), "Inner content", /*#__PURE__*/React.createElement("br", null), "Inner content", /*#__PURE__*/React.createElement("br", null), "Inner content", /*#__PURE__*/
                        React.createElement("br", null), "Inner content", /*#__PURE__*/React.createElement("br", null), "Inner content", /*#__PURE__*/React.createElement("br", null), "Inner content", /*#__PURE__*/React.createElement("br", null), "Inner content", /*#__PURE__*/React.createElement("br", null)))));
    }
}
const mainStyle = { fontFamily: '"Lato", "Lucida Grande", "Lucida Sans Unicode", Tahoma, Sans-Serif', border: '1px solid black', display: 'inline-block', padding: '0 15px', borderRadius: '4px' };
const toggleStyle = { padding: '15px', cursor: 'pointer' };
const containerStyle = { transition: 'all 0.5s ease', overflow: 'hidden' };
const contentStyle = { paddingBottom: '15px' };
Collapse.defaultProps = {
    isOpen: false
};
const root = document.createElement('div');
const root2 = document.createElement('div');
const root3 = document.createElement('div');
document.body.appendChild(root);
document.body.appendChild(root2);
document.body.appendChild(root3);
ReactDOM.render( /*#__PURE__*/React.createElement(Collapse, null), root);
ReactDOM.render( /*#__PURE__*/React.createElement(Collapse, null), root2);
ReactDOM.render( /*#__PURE__*/React.createElement(Collapse, null), root3);

<script src='https://cdnjs.cloudflare.com/ajax/libs/react/16.0.0-rc.3/umd/react.production.min.js'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.0.0-rc.3/umd/react-dom.production.min.js'></script>

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<!-- This script got from frontendfreecode.com -->

<script src='https://cdnjs.cloudflare.com/ajax/libs/react/16.0.0-rc.3/umd/react.production.min.js'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.0.0-rc.3/umd/react-dom.production.min.js'></script>
</head>
<body>
<div id="bcl"><a style="font-size:8pt;text-decoration:none;" href="http://www.devanswer.com">Free Frontend</a></div>
<script>
class Collapse extends React.Component {
    constructor(props) {
        super(props);
        this.state = {
            isOpen: props.isOpen
        };
        this.setContentRef = r => this.contentEl = r;
        this.setContainerRef = r => this.containerEl = r;
        this.toggle = () => this.setState(s => ({ isOpen: !s.isOpen }));
    }
    componentWillReceiveProps(nextProps) {
        if (nextProps.isOpen !== this.props.isOpen && nextProps.isOpen !== this.state.isOpen) {
            this.toggle();
        }
    }
    componentDidMount() {
        this.updateHeight(this.state.isOpen);
    }
    componentDidUpdate() {
        this.updateHeight(this.state.isOpen);
    }
    updateHeight(isOpen) {
        if (isOpen) {
            this.containerEl.style.height = `${this.contentEl.scrollHeight}px`;
        } else {
            this.containerEl.style.height = '0px';
        }
    }
    render() {
        return /*#__PURE__*/(
            React.createElement("div", { style: mainStyle }, /*#__PURE__*/
                React.createElement("div", { onClick: this.toggle, style: toggleStyle }, "Click me to open/close"), /*#__PURE__*/
                React.createElement("div", { ref: this.setContainerRef, style: containerStyle }, /*#__PURE__*/
                    React.createElement("div", { ref: this.setContentRef, style: contentStyle }, "Inner content", /*#__PURE__*/
                        React.createElement("br", null), "Inner content", /*#__PURE__*/React.createElement("br", null), "Inner content", /*#__PURE__*/React.createElement("br", null), "Inner content", /*#__PURE__*/React.createElement("br", null), "Inner content", /*#__PURE__*/React.createElement("br", null), "Inner content", /*#__PURE__*/
                        React.createElement("br", null), "Inner content", /*#__PURE__*/React.createElement("br", null), "Inner content", /*#__PURE__*/React.createElement("br", null), "Inner content", /*#__PURE__*/React.createElement("br", null), "Inner content", /*#__PURE__*/React.createElement("br", null)))));
    }
}
const mainStyle = { fontFamily: '"Lato", "Lucida Grande", "Lucida Sans Unicode", Tahoma, Sans-Serif', border: '1px solid black', display: 'inline-block', padding: '0 15px', borderRadius: '4px' };
const toggleStyle = { padding: '15px', cursor: 'pointer' };
const containerStyle = { transition: 'all 0.5s ease', overflow: 'hidden' };
const contentStyle = { paddingBottom: '15px' };
Collapse.defaultProps = {
    isOpen: false
};
const root = document.createElement('div');
const root2 = document.createElement('div');
const root3 = document.createElement('div');
document.body.appendChild(root);
document.body.appendChild(root2);
document.body.appendChild(root3);
ReactDOM.render( /*#__PURE__*/React.createElement(Collapse, null), root);
ReactDOM.render( /*#__PURE__*/React.createElement(Collapse, null), root2);
ReactDOM.render( /*#__PURE__*/React.createElement(Collapse, null), root3);
</script>

</body>
</html>

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