25 lines
474 B
JavaScript
25 lines
474 B
JavaScript
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const add = (a, b) => {
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return new Promise((resolve, reject) => {
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setTimeout(() => {
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if (a < 0 || b < 0) {
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return reject('Numbers must be non-negative')
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}
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resolve(a + b)
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}, 2000)
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})
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}
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const doWork = async () => {
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const sum = await add(1, -99)
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const sum2 = await add(sum, 50)
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const sum3 = await add(sum2, -3)
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return sum3
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}
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doWork().then((result) => {
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console.log('result', result)
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}).catch((e) => {
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console.log('e', e)
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})
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