回答編集履歴
2
調整
test
CHANGED
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@@ -40,6 +40,6 @@
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40
40
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const print =(v,w)=>wait(w).then(x=>num.textContent=v);
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41
41
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const wait = (sec) =>new Promise(resolve =>setTimeout(resolve,sec*1000));
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42
42
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console.log("start");
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43
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-
Promise.all([...Array(start_num - end_num+1)].map((_,i)=>i).map(x=>print(
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43
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+
Promise.all([...Array(start_num - end_num+1)].map((_,i)=>i).map(x=>print(start_num-x,x))).then(()=>console.log("end"));
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44
44
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</script>
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45
45
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```
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1
調整
test
CHANGED
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@@ -26,3 +26,20 @@
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26
26
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<p class="num"></p>
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27
27
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</div>
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28
28
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```
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29
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+
# 参考
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30
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+
async/awaitがいやなら予めスケジューリングしてpromise.allしてもよいかも
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31
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+
```javascript
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32
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+
<div class="box">
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33
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+
<p class="num"></p>
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34
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+
</div>
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35
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+
<script>
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36
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+
const box = document.querySelector(".box");
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37
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+
const num = document.querySelector(".num");
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38
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+
const start_num=5;
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39
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+
const end_num=0;
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40
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+
const print =(v,w)=>wait(w).then(x=>num.textContent=v);
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41
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+
const wait = (sec) =>new Promise(resolve =>setTimeout(resolve,sec*1000));
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42
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+
console.log("start");
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43
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+
Promise.all([...Array(start_num - end_num+1)].map((_,i)=>i).map(x=>print(x,start_num-x))).then(()=>console.log("end"));
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44
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+
</script>
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45
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+
```
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