blocks|key|653001|text|您应该使用typeError|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|653002|下面是我的代码中的一个示例：|653003|amount:+Yup.number()
++++++++++++++++++++.typeError('Amount+must+be+a+number')
++++++++++++++++++++.required("Please+provide+plan+cost.")
++++++++++++++++++++.min(0,+"Too+little")
++++++++++++++++++++.max(5000,+'Very+costly!')|code-block|syntax|javascript|653004|entityMap^0|5|9|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|R|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|S|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|N|$]]

You should use typeError

Here is an example from my code:

<pre><code>amount: Yup.number()
 .typeError('Amount must be a number')
 .required("Please provide plan cost.")
 .min(0, "Too little")
 .max(5000, 'Very costly!')
</code></pre>

blocks|key|1891054|text|由于您希望该字段在值为NaN且不是必需字段时仍然有效，因此将otherwise更改为此应该可以修复它：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1891055|otherwise:+Yup.number().notRequired().nullable()|1891056|在最后添加.nullable()是关键。|1891057|entityMap^0|B|3|U|9|0|0|1C|0|5|B|0^^$0|@$1|2|3|4|5|6|7|L|8|@$9|M|A|N|B|C]|$9|O|A|P|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|T|8|@$9|U|A|V|B|C]]|D|@]|E|$]]|$1|J|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|K|$]]

Since you want the field to still validate when the value is <code>NaN</code> and it's not a required field, changing your <code>otherwise</code> to this should fix it:
<code>otherwise: Yup.number().notRequired().nullable()</code>
Adding the <code>.nullable()</code> at the end is the key.

blocks|key|1891066|text|您可以使用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1891067|amount:+yup.number().typeError("")|code-block|syntax|javascript|1891068|这将省略验证消息，但在执行此操作时，您应该是谨慎的。|offset|length|style|BOLD|1891069|entityMap^0|0|0|M|3|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

You can use:
<pre><code>amount: yup.number().typeError(&quot;&quot;)
</code></pre>
This will omit the validation message, but you should be careful when doing this.

blocks|key|653074|text|使用这段代码.transform((值)+=>+(isNaN(值)？0:+value))|type|unstyled|depth|inlineStyleRanges|entityRanges|data|653075|age:+yup
.number()
.transform((value)+=>+(isNaN(value)+%7C%7C+value+===+null+%7C%7C+value+===+undefined)+?+0+:+value)
.required()
.label("Age"),|code-block|syntax|javascript|653076|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Use this piece of code .transform((value) =&gt; (isNaN(value) ? 0 : value))
<pre><code>age: yup
.number()
.transform((value) =&gt; (isNaN(value) || value === null || value === undefined) ? 0 : value)
.required()
.label(&quot;Age&quot;),
</code></pre>

blocks|key|653078|text|在typeError中添加when|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|653079|vehicleProvider:+Yup.object()+//+This+is+an+object+which+is+null+by+default
++++.required('formvalidation.required.message')
++++.nullable(),+
reserveVehicle:+Yup.number().when('vehicleProvider',+{+//+This+is+a+number+which+is+null+by+default
++++is:+provider+=>+provider?.hasReserve,
++++then:+Yup.number()
++++++++.typeError('Amount+must+be+a+number')
++++++++.required('formvalidation.required.message')
++++++++.nullable(),
++++otherwise:+Yup
++++++++.number()
++++++++.typeError('Amount+must+be+a+number')
++++++++.notRequired()
}),|code-block|syntax|javascript|653080|entityMap^0|D|4|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

add typeError in <code>when</code>
<pre><code>vehicleProvider: Yup.object() // This is an object which is null by default
 .required('formvalidation.required.message')
 .nullable(), 
reserveVehicle: Yup.number().when('vehicleProvider', { // This is a number which is null by default
 is: provider =&gt; provider?.hasReserve,
 then: Yup.number()
 .typeError('Amount must be a number')
 .required('formvalidation.required.message')
 .nullable(),
 otherwise: Yup
 .number()
 .typeError('Amount must be a number')
 .notRequired()
}),
</code></pre>

I'm trying to implement a quite basic validation for a form field/select. Validation schema:

<pre><code>vehicleProvider: Yup.object() // This is an object which is null by default
 .required('formvalidation.required.message')
 .nullable(), 
reserveVehicle: Yup.number().when('vehicleProvider', { // This is a number which is null by default
 is: provider =&gt; provider?.hasReserve,
 then: Yup.number()
 .required('formvalidation.required.message')
 .nullable(),
 otherwise: Yup.number().notRequired()
}),
</code></pre>

What I want to do: Only require/validate <code>reserveVehicle</code> if <code>provider.hasReserve</code> is <code>true</code>. Otherwise, don't require the number.
I get this error:

<blockquote>
 "reserveVehicle must be a <code>number</code> type, but the final value was: <code>NaN</code> (cast from the value <code>NaN</code>)."
</blockquote>

This makes sense (kind of) because, well <code>null</code> is Not a number. But as I'm trying to tell it that it shouldn't be required, in my opinion it shouldn't try to evaluate it.

Did I miss any key concepts of <code>Yup</code>?

Yup.when: "`NaN` (cast from the value `NaN`)"

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我试图为表单字段/select实现一个非常基本的验证。验证模式：vehicleProvider: Yup.object() // This is an object which is null by default    .required('formvalidation.required.message')    ....

问Yup.when：“the”(从值‘the’中铸造)
EN

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问Yup.when：“the”(从值‘the’中铸造)EN