JavaScript：如何访问String对象的字符串值？

Question

I am trying to extend a method to the String prototype .

I want this method to manipulate the string value but I am not sure how do access it.

this the current object context seems to refer to the string object, but not the actual string value.

String.prototype.test = function() { console.log(this)}
function () { console.log(this) }
'lol'.test()
 VM192:2 String {0: "l", 1: "o", 2: "l", length: 3, 
 has: function, contains: function, 
 escapeRegExp: function, camelize: function…
}

How do I access the string value instead of the string object?

Answer 1

You need call toString()

String.prototype.test = function() { 
    console.log(this.toString())
}

Answer 2

只需调用toString方法：

console.log( this.toString() )