JavaScript Numbers Having Strange Behavior

Insight

The highest integer that can safely be stored in JavaScript is 9007199254740991
link

Dilemma

1000000000000 === 999999999999.999999  // Returns true
1000000000000 === 999999999999.99999   // Returns true
1000000000000 === 999999999999.9999    // Returns false

Do you know why this anomaly is occurring?

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