React component a layer for message transfer between iframe and parent.

In React

// Parent page, which have a iframe page
import React, {Component} from 'react';
import {IFramer} from '@ali/iframer';

class Parent extends Component {
	render() {
		const src='https://the.url.of.iframe.page';
		return (
			<IFramer src={src} />
		);
	}
}

// Child page，which will iframed in parent page
import React, {Component} from 'react';
import {iframer} from '@ali/iframer';

@iframer
class Child extends Component {
	render() {
		return (
			<div style={{height: 1000}}>
				This is the iframe page.
			</div>
		);
	}
}

IFramer

React component, which is replace of iframe label IFramer component consist of message listener, message executor and message emitter IFramer component realized the syncHeight action inside of it, needn't the action again other you need custom syncHeight action.

• src: string required, the url for iframe
• style: object optional，the custom style for iframe label
• width: string || number optional, the width of iframe, default is 100%
• height: string || number optional, the height of iframe, default is 800
• iframeName: string optional, the name for iframe page, which will send to iframe page within the message body as to field
• actions: object optional, method set, the action in set will execute once the iframe send action message to parent page

IFramer.emit

Send message to iframe page, e.g.: this.iframe.emit({action: 'updateTimestamp', data: Date.now()}) the format of message the iframe page received is: {action: 'updateTimestamp', data: '150693657122', to: iframeName, source: 'IFramer'}

iframer

High Order Component, enhance the iframe component, consist of message listener, message executor and message emitter There are 3 types for using:

• Decorator: add the decorator to iframe component directly

@iframer
class Child extends Component { ... }

• Decorator with config: add the decorator with a config

const config = {
	dom: 'body', // get the DOM with document.querySelector(dom) if set, default DOM is the iframe page component
	targetOrigin: 'https://www.xxx.com' // default is '*'
}

• Function

class Child extends Component { ... }
export iframer(Child, config);

iframer.emit

Send message to parent page: this.emit({action: 'updateTimestamp', data: Date.now()}) The format for message parent received: {action: 'updateTimestamp', data: '150693657122', from: iframeName, source: 'IFramer'}

Example

The requirement:

1. The Parent page need embed a iframe page which we called Child
2. Each page for Parent and Child have a state field with "timestamp" individually) for display
3. There is a Button in Parent need update the timestamp in Child, in turn, same as Child

There is not some stupid requirement in real world, it's just a demo Method: Parent and Child realized the "updateTimestamp" action individually for themselves, the Parent will send action message to iframe to invoke the "updateTimestamp" method, the same as Child.

// Parent
import React, {Component} from 'react';
import {IFramer} from 'react-iframer';

class Parent extends Component {
	state = {
		timestamp: 0
	}

	/**
	 * update the timestamp field, for invoking by iframe
	 * there will have no effect if this method was supply
	 * @param timestamp, the data value in message
	 * @param message, the message body
	 */
	updateTimestamp = (timestamp, message) => {
		this.setState({timestamp})
	}

	/**
	 * send action message to iframe page to invoke method in iframe component
	 */
	invokeIframeMethod = (action) => {
		return () => {
			let timestamp = Date.now();
			this.iframe.emit({action, timestamp});
		};
	}

	render() {
		let {timestamp} = this.state;
		let src = 'http://www.iframe.url.page';

		let actions = {updateTimestamp: this.updateTimestamp};

		return (
			<div>
				<div>
				  <button type="primary"
					  onClick={this.invokeIframeMethod('updateTimestamp')}>
				  update the iframe (Child) timestamp
				  </button>
				</div>
				<div>{timestamp}</div>
				<div>
					<Iframer
					src={src}
					iframeName="Child" style={{height: 100}}
					ref={ref => {this.iframe = ref}} actions={actions} />
				</div>
			</div>
		)
	}
}

// Child
import React, {Component} from 'react';
import {iframer} from '@ali/iframer';
import {Button} from '@alife/next';

@iframer
class Child extends Component {
	state = {
		timestamp: 0
	};

	/**
	 * Update the timestamp field, for invoking by parent's action message
	 * @param timestamp, the data value in message
     * @param message, the message body
	 */
	updateTimestamp = (timestamp, message) => {
		this.setState({timestamp})
	}

	/**
	 * send action message to Parent page
	 */
	invokeParentMethod = (action) => {
		return () => {
			let timestamp = Date.now();
			this.props.emit({action, timestamp});
		};
	}

	render() {
		let {timestamp} = this.state;

		return (
			<div>
				<div>
				  <button onClick={this.invokeParentMethod('updateTimestamp')}>
				  Update Parent's timestamp
				  </button>
				</div>
				<div>{timestamp}</div>
			</div>
		)
	}

}