Created
February 28, 2018 08:54
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JavaScript: Async constructor
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| class MyFirstClass { | |
| constructor() { | |
| return new Promise(async (resolve, reject) => { | |
| try { | |
| resolve(this); | |
| } catch(error) { | |
| reject(error); | |
| } | |
| }); | |
| } | |
| } | |
| /* | |
| * Extending: if parent constructor cannot fail/reject/throw | |
| */ | |
| class MySecondClass extends MyFirstClass { | |
| constructor() { | |
| super(); | |
| return new Promise(async (resolve, reject) => { | |
| try { | |
| resolve(this); | |
| } catch(error) { | |
| reject(error); | |
| } | |
| }); | |
| } | |
| } | |
| /* | |
| * Extending: if parent constructor can fail/reject/throw | |
| */ | |
| class MySecondClass extends MyFirstClass { | |
| constructor() { | |
| try { | |
| super(); | |
| return new Promise(async (resolve, reject) => { | |
| try { | |
| resolve(this); | |
| } catch(error) { | |
| reject(error); | |
| } | |
| }); | |
| } catch(error) { | |
| return Promise.reject(error); | |
| } | |
| } | |
| } | |
| async () => { | |
| await new MyFirstClass(); | |
| } |
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