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Yup validation
1. Simple Validation
2. Dependent Validation
3. Dependent on multiple fields
4. Custom Validation
5. Async custom validation
Note: I have used "await" for the last promise as it will wait till all the above promise are resolved. If we dont wait then programs exits wihtout returning result of promise
const yup = require("yup")
//Simple validation
const schemaValidatorObject = yup.object().shape({
price: yup.number(),
year: yup.number().required(),
model: yup.string().required(),
engine: yup.string().required()
});
const car = {
year: 200,
model: "Hyundai",
engine: "Petrol",
price: 2000
};
schemaValidatorObject.validate(car).then(function(value) {
console.log(value)
}).catch(function(err){
console.log(err)
})
// Dependent Validation
let dependentValidation = yup.object().shape({
isMorning: yup
.boolean(),
tea: yup.boolean().when("isMorning", {
is: true,
then: yup.boolean().required()
})
});
dependentValidation.validate({ isMorning: true}, {abortEarly: false}).then(function(value) {
console.log(value)
}).catch(function(err){
console.log(err)
})
// Dependent on multiple fields
const multipleDependentValidation = yup.object().shape({
isMorning: yup
.boolean(),
isSunday: yup.boolean(),
coffee: yup.number().when(['isMorning', 'isSunday'], {
is: (isMorning, isSunday) => {
return true
},
then: yup.number().required()
}),
});
multipleDependentValidation.validate({ isMorning: true, isSunday: true, coffee: true }).then(function(value) {
console.log(value)
}).catch(function(err){
console.log(err)
})
// Custom Validation
let customValidation = yup.object().shape({
bevrage: yup.string().test('is-tea',
'${path} is not tea',
value => value === 'tea')
});
customValidation.validate({ bevrage: "tea"}).then(function(value) {
console.log(value)
}).catch(function(err){
console.log(err)
})
// Async custom validation
let orderTea = yup.object().shape({
bevrage: yup.string().test('is-tea',
'${path} is not tea',
async (value) => await value === "tea")
});
await orderTea.validate({ bevrage: "coffee"})
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