javascript - Prevent uglifyjs from renaming certain functions - Stack Overflow

admin管理员组

文章数量:1244313

I have a function that has a constructor within it. It creates a new object and returns it:

function car() {
   function Car() {}
   return new Car();
}

As a result uglify renames Car to some letter and when this returns it looks like the object name is just some letter. In chrome for instance it will say the type of the object is "t".

Is there a way to tell uglify to preserve some function's name?

I have a function that has a constructor within it. It creates a new object and returns it:

function car() {
   function Car() {}
   return new Car();
}

As a result uglify renames Car to some letter and when this returns it looks like the object name is just some letter. In chrome for instance it will say the type of the object is "t".

Is there a way to tell uglify to preserve some function's name?

• javascript
• uglifyjs

Share Improve this question Follow asked Oct 9, 2012 at 19:41 ParrisParris 18.4k1919 gold badges9696 silver badges135135 bronze badges 4

• 1 Why does it matter? Just for debugging purposes? You shouldn't be using the uglified version for debugging anyway. – Ruan Mendes Commented Oct 9, 2012 at 19:44
• I'd say it is more semantic than anything else. If you are exposing a library out to people they should know what type of object they are working with. – Parris Commented Oct 9, 2012 at 19:46
• How does it help to know that the name of the constructor is Car? It looks like you are trying to keep it private so there should be no need for users of your library to know what the name of the constructor is. If it's a public object, there's no need to declare it within the function. – Ruan Mendes Commented Oct 9, 2012 at 19:52
• 1 I believe that there are people out there that check type based on the name of an object: stackoverflow./questions/332422/… Which may be useful in some cases? Hmmm.. perhaps not? – Parris Commented Oct 9, 2012 at 20:17

Add a ment  | 

2 Answers 2

Sorted by: Reset to default 10

You need to use the reserved-names parameter:

--reserved-names “Car”

Even if you follow Bill's suggestion, there's still a problem with your approach.

car().constructor !== car().constructor

One would expect those to be equal

I would change your approach to creating a constructor and giving it a Factory constructor

/** @private */
function Car() {
   ...
}

Car.create = function() {
    return new Car();
}

Or the following (module pattern), bined with Bill's approach. Then you're not returning an object with a different prototype every time

var car  = (function() {
   function Car() {...}
   return function() {
       return new Car();
   }
})();

// car().constructor === car().constructor // true

本文标签： javascriptPrevent uglifyjs from renaming certain functionsStack Overflow