30秒学会 JavaScript 片段 – isPrimitive

Returns a boolean determining if the passed value is primitive or not.

Create an object from val and compare it with val to determine if the passed value is primitive (i.e. not equal to the created object).

代码片段

const isPrimitive = val => Object(val) !== val;

使用样例

isPrimitive(null); // true
isPrimitive(undefined); // true
isPrimitive(50); // true
isPrimitive('Hello!'); // true
isPrimitive(false); // true
isPrimitive(Symbol()); // true
isPrimitive([]); // false
isPrimitive({}); // false