Returns true if the specified value is null, false otherwise.
Use the strict equality operator to check if the value of val is equal to null.
代码片段
const isNull = val => val === null;使用样例
isNull(null); // trueReturns true if the specified value is null, false otherwise.
Use the strict equality operator to check if the value of val is equal to null.
const isNull = val => val === null;isNull(null); // true