I'm setting max to Infinity on this object:

let RANGE_DEFAULT_OPTIONS: any = { min: 0, max: Infinity };
console.log(RANGE_DEFAULT_OPTIONS); // {min: 0, max: null}

When the RANGE_DEFAULT_OPTIONS object is logged, it logs null for the max property.

const obj = { min: 0, max: Infinity };

console.log(obj);

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In the case of StackBlitz, there’s probably a call to JSON.stringify(…) somewhere down there, which messes things up (which is sad, IMO):

CodePudding user response：

Here's the same code in a snippet you can run in your browser. As you can see, Infinity and null are not equal.

let RANGE_DEFAULT_OPTIONS = { min: 0, max: Infinity };
console.log(RANGE_DEFAULT_OPTIONS);
console.log('strict equality', Infinity === null);
console.log('loose equality', Infinity == null);

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