setInterval function callback

Question

setInterval function callback

CharlesKuncheria opened this issue 9 years ago · 4 comments

Why cant we see the setInterval's callback function in the queue?

Answer 1 · 2017-05-12T23:28:33.000Z

Works as long as you don't use ES6 arrow syntax =>

setInterval(function E() { console.log('E'); }, 5000);

http://latentflip.com/loupe/?code=Ly8gQ29kZSBTbmlwcGV0CmNvbnNvbGUubG9nKCdBJyk7CnNldFRpbWVvdXQoZnVuY3Rpb24gQigpIHsgY29uc29sZS5sb2coJ0InKTsgfSwgMCk7CnNldFRpbWVvdXQoZnVuY3Rpb24gQygpIHsgY29uc29sZS5sb2coJ0MnKTsgfSwgNTAwMCk7CnNldEludGVydmFsKGZ1bmN0aW9uIEUoKSB7IGNvbnNvbGUubG9nKCdFJyk7IH0sIDUwMDApOwpjb25zb2xlLmxvZygnRCcpOw%3D%3D!!!

Answer 2 · 2017-09-08T15:45:25.000Z

Even with ES5 syntax I was not able to see the callback using setInterval

http://latentflip.com/loupe/?code=dmFyIGludGVydmFsQ291bnRlciA9IDAsDQogICAgdGltZW91dENvdW50ZXIgPSAwOw0KICAgIA0KZnVuY3Rpb24gZG9TdGlmZiAoKSB7DQogICAgaWYgKGludGVydmFsQ291bnRlciA%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%3D!!!PGJ1dHRvbj5DbGljayBtZSE8L2J1dHRvbj4%3D

Answer 3 · 2017-09-08T16:13:09.000Z

I see the commands being run in setInterval but not the name of the function in 'Web Apis' column, and setInterval is incorrectly returning null instead of something which can be called by clearInterval.

Answer 4 · 2017-09-08T17:45:54.000Z

The return is just a logic breaker to stop the interval when it to be in 5 seconds or higher loop, but the point is just that I'm not able to see the doStiff method in "Web Apis" column to understand how setInterval differs to setTimeout in event loop cicle.