The function object that is the initial value of String.prototype.trimLeft is the same function object that is the initial value of String.prototype.trimStart.
Every built-in Function object, including constructors, that is not
identified as an anonymous function has a name property whose value
is a String.
Unless otherwise specified, the name property of a built-in Function
object, if it exists, has the attributes { [[Writable]]: false,
The function object that is the initial value of String.prototype.trimRight is the same function object that is the initial value of String.prototype.trimEnd.
Every built-in Function object, including constructors, that is not
identified as an anonymous function has a name property whose value
is a String.
Unless otherwise specified, the name property of a built-in Function
object, if it exists, has the attributes { [[Writable]]: false,