回答編集履歴
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            こんな感じです
         
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            ```javascript
         
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            const f = ()=>new Promise( 
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            const f = ()=>new Promise(resolve => {
         
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              setTimeout(()=> resolve(1), 1000);
         
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            });
         
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            const g = (arg)=>new Promise( 
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            const g = (arg)=>new Promise(resolve => {
         
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              setTimeout(()=> resolve(arg+"2"), 500);
         
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            });
         
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            const h = (arg)=>new Promise( 
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            const h = (arg)=>new Promise(resolve => {
         
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              setTimeout(()=> resolve(arg+"3"), 300);
         
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            });
         
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