"function count(start, end) {
console.log(start)
var timer = setInterval(
()=>{
console.log(++start)
while(start>=end){
clearInterval(timer)
break
}
},100)
return {
cancel(){
clearInterval(timer)
}
}
}
"function count(start, end) {
console.log(start)
var timer = setInterval(
()=>{
console.log(++start)
while(start>=end){
clearInterval(timer)
break
}
},100)
return {
cancel(){
clearInterval(timer)
}
}
}
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