Created
September 29, 2020 09:42
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JavaScript Windows and iFrames
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Parent Window</title> | |
| </head> | |
| <body> | |
| <label>Avatar</label> | |
| <br/> | |
| <input type="text" name="avatar" readonly> | |
| <br/> | |
| <a href="#" id="picker">Choose avatar</a> | |
| <script> | |
| // https://www.youtube.com/watch?v=cmA-IyD8_BA | |
| var picker = document.getElementById('picker'); | |
| // https://javascript.info/popup-windows | |
| picker.addEventListener('click', function() { | |
| // https://stackoverflow.com/a/11313219/2732184 | |
| window.open('picker.html', 'Picker', 'width=400,height=300'); | |
| }); | |
| window.addEventListener("message", (event) => { | |
| if (event.origin !== window.origin) { | |
| alert("Cross Site Request Forgery (XSRF) from " + event.origin); | |
| return; | |
| } | |
| // console.log({"source": event.source, "data": event.data}); | |
| if(event.data.action == "avatarSelected") { | |
| document.getElementsByName('avatar')[0].value = event.data.avatar.url; | |
| } | |
| }, false); | |
| </script> | |
| </body> | |
| </html> |
This file contains hidden or 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
| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Picker</title> | |
| </head> | |
| <body> | |
| <label>Avatar</label> | |
| <br/> | |
| <small>https://via.placeholder.com/300</small> | |
| <br> | |
| <button id="chooser">Choose avatar</button> | |
| <script> | |
| var chooser = document.getElementById('chooser'); | |
| // https://developer.mozilla.org/en-US/docs/Web/API/Window/postMessage | |
| chooser.addEventListener('click', function() { | |
| window.opener.postMessage({ | |
| action: 'avatarSelected', | |
| avatar: { | |
| url: 'https://via.placeholder.com/300', | |
| } | |
| }, window.opener.origin); | |
| window.close(); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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