Closure compiler exe

In many cases this behavior is exactly what you want. For example, if you compile your code together with a large library, Closure Compiler can determine which functions from that library you actually use and discard the ones that you don't use. If, however, you find that Closure Compiler is removing functions you want to keep, there are two ways to prevent this:. You may encounter unwanted code removal if you only compile part of your code with Closure Compiler.

For example, you might have a library file that contains only function definitions, and an HTML file that includes the library and that contains the code that calls those functions.

The simplest solution to this problem is to compile your functions together with the portion of your program that calls those functions. For example, Closure Compiler will not remove displayNoteTitle when it compiles the following program:.

The displayNoteTitle function isn't removed in this case because Closure Compiler sees that it is called. In other words, you can prevent unwanted code removal by including your program's entry point in the code that you pass to Closure Compiler. The entry point of a program is the place in the code where the program begins executing. For example, in the flower note program from the previous section, the last three lines are executed as soon as the JavaScript is loaded in the browser.

This is the entry point for this program. To determine what code you need to keep, Closure Compiler starts at this entry point and traces the control flow of the program forward from there. More information on this solution is given below and in the page on externs and exports.

Closure Compiler compilation never changes string literals in your code, no matter what compilation level you use. If you mix string references to a property with dot-syntax references, Closure Compiler renames some of the references to that property but not others. As a result, your code will probably not run correctly. The last two statements in this source code do exactly the same thing. The last statement in the compressed code produces an error. The direct reference to the myTitle property has been renamed to a , but the quoted reference to myTitle within the displayNoteTitle function has not been renamed.

As a result, the last statement refers to a myTitle property that is no longer there. This solution is pretty simple. LogRocket allows you to understand these errors in new and unique ways. Our frontend monitoring solution tracks user engagement with your JavaScript frontends to give you the ability to find out exactly what the user did that led to an error.

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Like this: Like Loading Published by uzzal. Published August 13, September 25, Next Post How to unblock the internet using proxy. Have you seen this post? It is a Closure implementation for Java 5, 6 and 7, it looks pretty neat, and works really well. Leave a Reply Cancel reply Enter your comment here Fill in your details below or click an icon to log in:. Email required Address never made public. Name required. For all but simple cases they are best avoided.

Exports rely on the fact that Closure Compiler doesn't modify string literals. By assigning an object to a property named using a literal, the object will be available through that property name even after compilation. If you are using Closure Library, exports can also be declared using the goog. More information is available in the Closure Library documentation of these functions.

However, be aware they have special compiler support and will be totally transformed in the compiled output. Exports are different from externs in that they only create an exposed alias for consumers to reference.

Within the compiled code, the exported symbol will still be renamed. For this reason, exported symbols must be constant, since reassigning them in your code would cause the exposed alias to point to the wrong thing.

This subtlety in renaming is especially complicated with respect to exported instance properties. In theory, exports can allow smaller code-size compared to externs, since long names can still be changed to shorter ones within your code. In practice, these improvements are often very minor, and don't justify the confusion exports create.