我想限制两个值之间的数字,我知道在 PHP 中你可以这样做:
I want to limit a number between two values, I know that in PHP you can do this:
$number = min(max(intval($number), 1), 20);
// this will make $number 1 if it's lower than 1, and 20 if it's higher than 20
我怎样才能在 javascript 中做到这一点,而不必编写多个 if
语句和类似的东西?谢谢.
How can I do this in javascript, without having to write multiple if
statements and stuff like that? Thanks.
这样的
var number = Math.min(Math.max(parseInt(number), 1), 20);
function limitNumberWithinRange(num, min, max){
const MIN = min || 1;
const MAX = max || 20;
const parsed = parseInt(num)
return Math.min(Math.max(parsed, MIN), MAX)
}
alert(
limitNumberWithinRange( prompt("enter a number") )
)
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