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js-xxx - v2.2.29
js-xxx
isNaN
Function isNaN
is
NaN
(
value
)
:
boolean
检查是否为 NaN
Parameters
value
:
any
值
Returns
boolean
Example
isNaN
(
1
);
/// false
isNaN
(
NaN
);
/// true
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js-xxx - v2.2.29
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检查是否为 NaN