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将旧API封装成Promise对象的方法
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| // 已setTimeout为例 | |
| const wait = ms => new Promise(resolve => setTimeout(resolve, ms)); | |
| // 调用 | |
| wait(1000).then(() => { | |
| // do something | |
| }); | |
| // 这样回调起来就舒服多了 |
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