检查 JavaScript 中除零外是否为假
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Check if falsy except zero in JavaScript
提问by mortensen
I am checking if a value is not falsy with
我正在检查一个值是否不假
if (value) {
..
}
but I do want to accept zeros as a (non-falsy) value. How is this normally done? Would it be
但我确实想接受零作为（非假）值。这通常是如何完成的？可不可能是
if (value || value === 0) {
..
}
or what?
要不然是啥？
回答by vinayakj
if (value || value === 0) {
..
}
is cleaner way, no problem.
是更清洁的方式，没问题。
Just for fun try this
只是为了好玩试试这个
val = 0;
if(val){
console.log(val)
}
//outputs 0 **update - it used to be.. but now it seems it doesnt in chrome
And
和
var val = 0;
if(val){
console.log(val)
}
//outputs nothing
回答by RK.
I would use value || value === 0. It's fine whichever way you do it but IMO this is the cleanest option.
我会使用value || value === 0. 无论您采用哪种方式都可以，但 IMO 这是最干净的选择。
