FR Translation: copy file to translate

Author: nfabredev

docs/playground/fr/3-7/Fixits/Big number literals.ts

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+//// { compiler: {  target: 99 }, order: 1 }
+
+// Did you know there is a limit to how big of a number you
+// can represent in JavaScript when writing ?
+
+const maxHighValue = 9007199254740991;
+const maxLowValue = -9007199254740991;
+
+// If you go one over/below these numbers
+// then you start to get into dangerous territory.
+
+const oneOverMax = 9007199254740992;
+const oneBelowMin = -9007199254740992;
+
+// The solution for handling numbers of this size
+// is to convert these numbers to BigInts instead
+// of a number:
+//
+// https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/BigInt
+
+// TypeScript will now offer a fixit for number
+// literals which are above 2^52 (positive / negative)
+// which adds the suffix "n" which informs JavaScript
+// that the type should be BigInt.
+
+// Number literals
+9007199254740993;
+-9007199254740993;
+9007199254740994;
+-9007199254740994;
+
+// Hex numbers
+0x19999999999999;
+-0x19999999999999;
+0x20000000000000;
+-0x20000000000000;
+0x20000000000001;
+-0x20000000000001;