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isSet

isSet(needle)

检测是否设置,以下类型视为未设置:undefined NaN null false

返回值:Boolean

参数说明类型可选值默认值
needle待检测对象*
js
console.log(JW.isSet(undefined));
console.log(JW.isSet(NaN));
console.log(JW.isSet(null));
console.log(JW.isSet(false));
console.log(JW.isSet(0));