24 lines
603 B
JavaScript
24 lines
603 B
JavaScript
'use strict';
|
|
|
|
var numToStr = Number.prototype.toString;
|
|
var tryNumberObject = function tryNumberObject(value) {
|
|
try {
|
|
numToStr.call(value);
|
|
return true;
|
|
} catch (e) {
|
|
return false;
|
|
}
|
|
};
|
|
var toStr = Object.prototype.toString;
|
|
var numClass = '[object Number]';
|
|
var hasToStringTag = typeof Symbol === 'function' && typeof Symbol.toStringTag === 'symbol';
|
|
|
|
module.exports = function isNumberObject(value) {
|
|
if (typeof value === 'number') {
|
|
return true;
|
|
}
|
|
if (typeof value !== 'object') {
|
|
return false;
|
|
}
|
|
return hasToStringTag ? tryNumberObject(value) : toStr.call(value) === numClass;
|
|
};
|