英文:
conditional variable === "something" &&
问题
为什么这个条件不起作用：
{
selectedConfig === "house" ||
selectedConfig === "Zone" ||
selectedConfig === "Departament" &&
<div>
<div className="flex flex-col w-1/2">
<InputForn
text="Nom"
name="nom"
inputType="text"
value=""
/>
</div>
<div className="flex flex-col w-1/2">
<InputForn
text="URL"
name="url"
inputType="text"
value=""
/>
</div>
</div>
}
这是React.js，我正在创建一个条件来显示/隐藏一些组件，所以目前当我选择Departament时它能够显示，但是在条件为house or zone时不起作用。
我认为运算符||不起作用，为什么？或者我应该怎么做才能让它起作用？
英文:
why this coditional is not working:
{
selectedConfig === "house" ||
selectedConfig === "Zone" ||
selectedConfig === "Departament" &&
<div>
<div className="flex flex-col w-1/2">
<InputForn
text="Nom"
name="nom"
inputType="text"
value=""
/>
</div>
<div className="flex flex-col w-1/2">
<InputForn
text="URL "
name="url"
inputType="text"
value=""
/>
</div>
</div>
}
It's react js, I'm creating one conditional to show/hide some component, so currently It's showing when I select Departament but not work when conditional are house or zone
I think that operator || not work, why?? or what can I do to work it ???
答案1
得分: 2
( selectedConfig === "house"
|| selectedConfig === "Zone"
|| selectedConfig === "Departament"
) && ...
The problem is that && has higher precedence than ||.
This means that
a || b || c && d
is equivalent to
a || b || (c && d)
But you want
(a || b || c) && d
As an aside, you say you want to check for zone, but you check for Zone. You are using inconsistent capitalization, and you misspelled "department". This is error-prone.
英文:
Add parens.
( selectedConfig === "house"
|| selectedConfig === "Zone"
|| selectedConfig === "Departament"
) && ...
The problem is that && has higher precedence than ||.
This means that
a || b || c && d
is equivalent to
a || b || ( c && d )
But you want
( a || b || c ) && d
As an aside, you say you want to check for zone, but you check for Zone. You are using inconsistent capitalization, and you misspelled "department". This is error prone.
答案2
得分: 0
需要使用括号对条件进行分组：
(selectedConfig === "house" || selectedConfig === "Zone" || selectedConfig === "Departament")
英文:
You need to group conditions with parentheses :
(selectedConfig === "house" || selectedConfig === "Zone" || selectedConfig === "Departament")
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