ubdate

node_modules/es-abstract/2021/ToIndex.js

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+'use strict';
+
+var GetIntrinsic = require('get-intrinsic');
+
+var $RangeError = GetIntrinsic('%RangeError%');
+
+var ToIntegerOrInfinity = require('./ToIntegerOrInfinity');
+var ToLength = require('./ToLength');
+var SameValue = require('./SameValue');
+
+// https://www.ecma-international.org/ecma-262/8.0/#sec-toindex
+
+module.exports = function ToIndex(value) {
+	if (typeof value === 'undefined') {
+		return 0;
+	}
+	var integerIndex = ToIntegerOrInfinity(value);
+	if (integerIndex < 0) {
+		throw new $RangeError('index must be >= 0');
+	}
+	var index = ToLength(integerIndex);
+	if (!SameValue(integerIndex, index)) {
+		throw new $RangeError('index must be >= 0 and < 2 ** 53 - 1');
+	}
+	return index;
+};