Created
July 20, 2018 14:30
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async/await & class
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class Test { | |
constructor() { | |
this.processData({}).then((data) => { | |
console.log(data); | |
}) | |
} | |
async processData(data) { | |
data = await this.one(data); | |
console.log('one'); | |
data = await this.two(data); | |
console.log('two'); | |
data = await this.three(data); | |
console.log('three'); | |
return data; | |
} | |
one(data) { | |
return new Promise((resolve, reject) => { | |
setTimeout(() => { | |
data.foo = 11; | |
data.bar = 42; | |
resolve(data); | |
}, 2000); | |
}); | |
} | |
two(data) { | |
return new Promise((resolve, reject) => { | |
setTimeout(() => { | |
if (data.hasOwnProperty('foo')) { | |
Object.keys(data).forEach((key) => { | |
data[key] = 2 * data[key]; | |
}); | |
resolve(data); | |
} else { | |
reject('wtf'); | |
} | |
}, 500); | |
}) | |
} | |
three(data) { | |
return new Promise((resolve, reject) => { | |
setTimeout(() => { | |
data.qux = Object.keys(data).reduce((result, key) => { | |
return result + data[key]; | |
}, 0); | |
resolve(data); | |
}, 1000); | |
}) | |
} | |
} | |
module.exports = new Test(); |
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