Created
September 14, 2021 12:22
-
-
Save siukalov/dd7a7bd070a177191c056a739c29445e to your computer and use it in GitHub Desktop.
Demo to show that Async/Await is non-blocking
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
| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <style> | |
| html { | |
| box-sizing: border-box; | |
| } | |
| *, | |
| *:before, | |
| *:after { | |
| box-sizing: inherit; | |
| } | |
| body { | |
| margin: 0; | |
| padding: 0; | |
| } | |
| .table { | |
| font-size: 20px; | |
| border-collapse: collapse; | |
| } | |
| .table__cell { | |
| border: 1px solid rgba(0, 0, 0, 0.4); | |
| padding: 4px; | |
| font-weight: normal; | |
| } | |
| @keyframes flash { | |
| 0% { | |
| color: black; | |
| } | |
| 30% { | |
| color: rgb(218, 84, 7); | |
| } | |
| 100% { | |
| color: black; | |
| } | |
| } | |
| .transition { | |
| animation: flash 0.6s 1; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <h1>Async/Await is non-blocking</h1> | |
| <table class="table"> | |
| <tr> | |
| <th class="table__cell"></th> | |
| <th class="table__cell">Duration(ms)</th> | |
| <th class="table__cell">Started</th> | |
| <th class="table__cell">Completed</th> | |
| </tr> | |
| <tr> | |
| <td class="table__cell">Async operation A</td> | |
| <td id="operation-a-duration" class="table__cell"></td> | |
| <td id="operation-a-started" class="table__cell"></td> | |
| <td id="operation-a-completed" class="table__cell"></td> | |
| </tr> | |
| <tr> | |
| <td class="table__cell">Async operation B</td> | |
| <td id="operation-b-duration" class="table__cell"></td> | |
| <td id="operation-b-started" class="table__cell"></td> | |
| <td id="operation-b-completed" class="table__cell"></td> | |
| </tr> | |
| <tr> | |
| <td class="table__cell">Async operation C</td> | |
| <td id="operation-c-duration" class="table__cell"></td> | |
| <td id="operation-c-started" class="table__cell"></td> | |
| <td id="operation-c-completed" class="table__cell"></td> | |
| </tr> | |
| </table> | |
| <script> | |
| function timer(ms) { | |
| return new Promise((resolve) => { | |
| setTimeout(() => { | |
| resolve(); | |
| }, ms); | |
| }); | |
| } | |
| function insertTextById(id, text) { | |
| document.getElementById(id).appendChild(document.createTextNode(text)); | |
| document.getElementById(id).classList.add('transition'); | |
| } | |
| function getTimestamp() { | |
| return new Intl.DateTimeFormat('en', { | |
| hour: 'numeric', minute: 'numeric', | |
| second: 'numeric', fractionalSecondDigits: 3, | |
| hour12: false | |
| }).format(new Date()) | |
| } | |
| async function opA() { | |
| const duration = 5000; | |
| insertTextById('operation-a-duration', duration); | |
| insertTextById('operation-a-started', getTimestamp()); | |
| await timer(duration); | |
| insertTextById('operation-a-completed', getTimestamp()); | |
| } | |
| async function opB() { | |
| const duration = 1000; | |
| insertTextById('operation-b-duration', duration); | |
| insertTextById('operation-b-started', getTimestamp()); | |
| await timer(duration); | |
| insertTextById('operation-b-completed', getTimestamp()); | |
| } | |
| async function opC() { | |
| const duration = 3000; | |
| insertTextById('operation-c-duration', duration); | |
| insertTextById('operation-c-started', getTimestamp()); | |
| await timer(duration); | |
| insertTextById('operation-c-completed', getTimestamp()); | |
| } | |
| (async () => { | |
| document.title = 'Processing...' | |
| await Promise.all([opA(), opB(), opC()]); | |
| document.title = 'Done!' | |
| })(); | |
| </script> | |
| </body> | |
| </html> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment