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callback-hell-examples.js
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callback-hell-examples.js
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setTimeout(
changeMaker => {
let list = changeMaker + ", "
setTimeout(
changeMaker => {
list += changeMaker + ", "
setTimeout(
changeMaker => {
list += changeMaker + ", "
setTimeout(
changeMaker => {
list += changeMaker + ", "
setTimeout(
changeMaker => {
list += changeMaker
console.log(list)
},
1,
"Travis Kalanick",
)
},
1,
"MarkZuckerberg",
)
},
1,
"SteveWoz",
)
},
1,
"SteveJobs",
)
},
1,
"BillGates",
)
/* Looking at the above, setTimeout gets a callback function that executes after one millisecond. The last parameter just feeds the callback with data, i.e the argument 'changeMaker' . This is like an Ajax call except the return 'changeMaker' parameter would come from the server.
I am gathering a list of changeMakers through asynchronous code. Each callback gives me a single 'changeMaker' name and I append that to the list. */