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uglify-js

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uglify-js - npm Package Compare versions

Comparing version

2.3.0
to
2.3.1

test/compress/issue-143.js

8

lib/parse.js

@@ -170,2 +170,10 @@ /***********************************************************************

function is_identifier_string(str){
for (var i = str.length; --i >= 0;) {
if (!is_identifier_char(str.charAt(i)))
return false;
}
return true;
};
function parse_js_number(num) {

@@ -172,0 +180,0 @@ if (RE_HEX_NUMBER.test(num)) {

2

package.json

@@ -6,3 +6,3 @@ {

"main": "tools/node.js",
"version": "2.3.0",
"version": "2.3.1",
"engines": { "node" : ">=0.4.0" },

@@ -9,0 +9,0 @@ "maintainers": [{

176

README.md

@@ -83,3 +83,3 @@ UglifyJS 2

--acorn Use Acorn for parsing. [boolean]
--spidermonkey Assume input fles are SpiderMonkey AST format (as JSON).
--spidermonkey Assume input files are SpiderMonkey AST format (as JSON).
[boolean]

@@ -226,7 +226,8 @@ --self Build itself (UglifyJS2) as a library (implies

dead code removal UglifyJS will discard the following from the output:
```javascript
if (DEBUG) {
console.log("debug stuff");
}
```
if (DEBUG) {
console.log("debug stuff");
}
UglifyJS will warn about the condition being always false and about dropping

@@ -239,7 +240,8 @@ unreachable code; for now there is no option to turn off only this specific

`build/defines.js` file with the following:
```javascript
const DEBUG = false;
const PRODUCTION = true;
// etc.
```
const DEBUG = false;
const PRODUCTION = true;
// etc.
and build your code like this:

@@ -302,11 +304,12 @@

example:
```javascript
function f() {
/** @preserve Foo Bar */
function g() {
// this function is never called
}
return something();
}
```
function f() {
/** @preserve Foo Bar */
function g() {
// this function is never called
}
return something();
}
Even though it has "@preserve", the comment will be lost because the inner

@@ -352,5 +355,6 @@ function `g` (which is the AST node to which the comment is attached to) is

like this:
```javascript
var UglifyJS = require("uglify-js");
```
var UglifyJS = require("uglify-js");
It exports a lot of names, but I'll discuss here the basics that are needed

@@ -365,21 +369,24 @@ for parsing, mangling and compressing a piece of code. The sequence is (1)

Example:
```javascript
var result = UglifyJS.minify("/path/to/file.js");
console.log(result.code); // minified output
// if you need to pass code instead of file name
var result = UglifyJS.minify("var b = function () {};", {fromString: true});
```
var result = UglifyJS.minify("/path/to/file.js");
console.log(result.code); // minified output
// if you need to pass code instead of file name
var result = UglifyJS.minify("var b = function () {};", {fromString: true});
You can also compress multiple files:
```javascript
var result = UglifyJS.minify([ "file1.js", "file2.js", "file3.js" ]);
console.log(result.code);
```
var result = UglifyJS.minify([ "file1.js", "file2.js", "file3.js" ]);
console.log(result.code);
To generate a source map:
```javascript
var result = UglifyJS.minify([ "file1.js", "file2.js", "file3.js" ], {
outSourceMap: "out.js.map"
});
console.log(result.code); // minified output
console.log(result.map);
```
var result = UglifyJS.minify([ "file1.js", "file2.js", "file3.js" ], {
outSourceMap: "out.js.map"
});
console.log(result.code); // minified output
console.log(result.map);
Note that the source map is not saved in a file, it's just returned in

@@ -390,18 +397,19 @@ `result.map`. The value passed for `outSourceMap` is only used to set the

You can also specify sourceRoot property to be included in source map:
```javascript
var result = UglifyJS.minify([ "file1.js", "file2.js", "file3.js" ], {
outSourceMap: "out.js.map",
sourceRoot: "http://example.com/src"
});
```
var result = UglifyJS.minify([ "file1.js", "file2.js", "file3.js" ], {
outSourceMap: "out.js.map",
sourceRoot: "http://example.com/src"
});
If you're compressing compiled JavaScript and have a source map for it, you
can use the `inSourceMap` argument:
```javascript
var result = UglifyJS.minify("compiled.js", {
inSourceMap: "compiled.js.map",
outSourceMap: "minified.js.map"
});
// same as before, it returns `code` and `map`
```
var result = UglifyJS.minify("compiled.js", {
inSourceMap: "compiled.js.map",
outSourceMap: "minified.js.map"
});
// same as before, it returns `code` and `map`
The `inSourceMap` is only used if you also request `outSourceMap` (it makes

@@ -435,5 +443,6 @@ no sense otherwise).

#### The parser
```javascript
var toplevel_ast = UglifyJS.parse(code, options);
```
var toplevel_ast = UglifyJS.parse(code, options);
`options` is optional and if present it must be an object. The following

@@ -451,12 +460,13 @@ properties are available:

something like this:
```javascript
var toplevel = null;
files.forEach(function(file){
var code = fs.readFileSync(file);
toplevel = UglifyJS.parse(code, {
filename: file,
toplevel: toplevel
});
});
```
var toplevel = null;
files.forEach(function(file){
var code = fs.readFileSync(file);
toplevel = UglifyJS.parse(code, {
filename: file,
toplevel: toplevel
});
});
After this, we have in `toplevel` a big AST containing all our files, with

@@ -474,12 +484,14 @@ each token having proper information about where it came from.

anything with the tree:
```javascript
toplevel.figure_out_scope()
```
toplevel.figure_out_scope()
#### Compression
Like this:
```javascript
var compressor = UglifyJS.Compressor(options);
var compressed_ast = toplevel.transform(compressor);
```
var compressor = UglifyJS.Compressor(options);
var compressed_ast = toplevel.transform(compressor);
The `options` can be missing. Available options are discussed above in

@@ -499,7 +511,8 @@ “Compressor options”. Defaults should lead to best compression in most

non-mangleable words). Example:
```javascript
compressed_ast.figure_out_scope();
compressed_ast.compute_char_frequency();
compressed_ast.mangle_names();
```
compressed_ast.figure_out_scope();
compressed_ast.compute_char_frequency();
compressed_ast.mangle_names();
#### Generating output

@@ -509,11 +522,13 @@

to generate code you do this:
```javascript
var stream = UglifyJS.OutputStream(options);
compressed_ast.print(stream);
var code = stream.toString(); // this is your minified code
```
var stream = UglifyJS.OutputStream(options);
compressed_ast.print(stream);
var code = stream.toString(); // this is your minified code
or, for a shortcut you can do:
```javascript
var code = compressed_ast.print_to_string(options);
```
var code = compressed_ast.print_to_string(options);
As usual, `options` is optional. The output stream accepts a lot of otions,

@@ -555,13 +570,14 @@ most of them documented above in section “Beautifier options”. The two

Example:
```javascript
var source_map = UglifyJS.SourceMap(source_map_options);
var stream = UglifyJS.OutputStream({
...
source_map: source_map
});
compressed_ast.print(stream);
var source_map = UglifyJS.SourceMap(source_map_options);
var stream = UglifyJS.OutputStream({
...
source_map: source_map
});
compressed_ast.print(stream);
var code = stream.toString();
var map = source_map.toString(); // json output for your source map
```
var code = stream.toString();
var map = source_map.toString(); // json output for your source map
The `source_map_options` (optional) can contain the following properties:

@@ -568,0 +584,0 @@

14

test/compress/issue-105.js
typeof_eq_undefined: {
options = {
comparisons: true,
unsafe: false
comparisons: true
};

@@ -16,3 +15,12 @@ input: { a = typeof b.c != "undefined" }

input: { a = typeof b.c != "undefined" }
expect: { a = b.c !== void 0 }
expect: { a = void 0 !== b.c }
}
typeof_eq_undefined_unsafe2: {
options = {
comparisons: true,
unsafe: true
};
input: { a = "undefined" != typeof b.c }
expect: { a = void 0 !== b.c }
}

8

test/compress/properties.js

@@ -20,2 +20,4 @@ keep_properties: {

a["if"] = "if";
a["*"] = "asterisk";
a["\u0EB3"] = "unicode";
}

@@ -25,2 +27,4 @@ expect: {

a["if"] = "if";
a["*"] = "asterisk";
a.\u0EB3 = "unicode";
}

@@ -37,2 +41,4 @@ }

a["if"] = "if";
a["*"] = "asterisk";
a["\u0EB3"] = "unicode";
}

@@ -42,3 +48,5 @@ expect: {

a.if = "if";
a["*"] = "asterisk";
a.\u0EB3 = "unicode";
}
}
bin/uglifyjs

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lib/compress.js

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