Created
July 27, 2020 22:31
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PoC to do bi-directional communiction between a parent and iframe document
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| <html> | |
| <body> | |
| <img id="image" /> | |
| <script> | |
| const image = document.getElementById('image') | |
| const postMessage = (data) => { | |
| top.postMessage(JSON.stringify(data), '*') | |
| } | |
| const handleMessage = (data) => { | |
| switch (data.action) { | |
| case 'update image': | |
| image.src = data.args[0] | |
| break; | |
| } | |
| } | |
| image.addEventListener('load', () => { | |
| postMessage({ | |
| action: 'image loaded' | |
| }) | |
| }) | |
| window.addEventListener('message', (ev) => { | |
| const data = JSON.parse(ev.data) | |
| handleMessage(data) | |
| }) | |
| </script> | |
| </body> | |
| </html> |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <html> | |
| <head> | |
| </head> | |
| <body> | |
| <iframe id="iframe"></iframe> | |
| <button type="button" id="button">Update Image</button> | |
| <script> | |
| const iframe = document.getElementById('iframe') | |
| const button = document.getElementById('button') | |
| const handleMessage = (data) => { | |
| switch (data.action) { | |
| case 'image loaded': | |
| alert('Image loaded') | |
| break; | |
| } | |
| } | |
| const postMessage = (data) => { | |
| iframe.contentWindow.postMessage(JSON.stringify(data), window.location.href) | |
| } | |
| window.addEventListener('message', (ev) => { | |
| const data = JSON.parse(ev.data) | |
| handleMessage(data) | |
| }) | |
| button.addEventListener('click', () => { | |
| postMessage({ | |
| action: 'update image', | |
| args: ['http://path/to/image.jpeg'] | |
| }, window.location.href) | |
| }) | |
| </script> | |
| </body> | |
| </html> |
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