flow like the river

VISUALIZACION/node_modules/es-abstract/2015/RegExpExec.js

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+'use strict';
+
+var GetIntrinsic = require('get-intrinsic');
+
+var $TypeError = GetIntrinsic('%TypeError%');
+
+var regexExec = require('call-bind/callBound')('RegExp.prototype.exec');
+
+var Call = require('./Call');
+var Get = require('./Get');
+var IsCallable = require('./IsCallable');
+var Type = require('./Type');
+
+// https://262.ecma-international.org/6.0/#sec-regexpexec
+
+module.exports = function RegExpExec(R, S) {
+	if (Type(R) !== 'Object') {
+		throw new $TypeError('Assertion failed: `R` must be an Object');
+	}
+	if (Type(S) !== 'String') {
+		throw new $TypeError('Assertion failed: `S` must be a String');
+	}
+	var exec = Get(R, 'exec');
+	if (IsCallable(exec)) {
+		var result = Call(exec, R, [S]);
+		if (result === null || Type(result) === 'Object') {
+			return result;
+		}
+		throw new $TypeError('"exec" method must return `null` or an Object');
+	}
+	return regexExec(R, S);
+};