tryCall: try invoking the function until it runs without throwing. Returns the value returned by the function.
tryUntil: try invoking the function until the returned value satisfies the provided validating function. Returns the value returned by the function.
Arguments:
func: the function to invoke with theiterationas a parameter- (only in
tryUntil)validate: the validating function. Stops executing once the validator returnstrue. Optionsobject:numAttempts: the number of iterationsinterval: the interval between each attemptonAttempt(optional): the function to invoke after each attempt
npm install --save tryfunc
Basic usage:
import { tryCall, tryUntil } from 'tryfunc'
function throwingFunction() {
// ...
}
async function foo() {
// try calling function
try {
const val = await tryCall(throwingFunc, {
interval: 100,
numAttempts: 10,
onAttempt: (err, i, success) => {
if (err) {
console.error(err)
}
console.log(`attempt ${i} ${success ? 'was successful' : 'failed'}`)
},
})
console.log('val', val)
} catch (err) {
console.error('function timed out')
}
// repeat until
try {
const val = await tryUntil(
() => Math.random(),
(val) => val < 0.1,
{
interval: 100,
numAttempts: 10,
onAttempt: (result, i, success) => {
console.log('received', result)
console.log(`attempt ${i} ${success ? 'was successful' : 'failed'}`)
},
},
)
console.log('val', val)
} catch (err) {
console.error('no value smaller than 0.1 produced')
}
}