pdf.js/external/builder/fixtures_babel/evals-expected.js

var a = false;
var b = true;
var c = true;
var d = false;
var e = true;
var f = "text";
var g = {
  obj: {
    i: 1
  },
  j: 2
};
var h = {
  test: "test"
};
var i = '0';
var j = {
  i: 1
};
var k = false;
var l = true;
Adds esprima-based preprocessor. 2016-05-10 18:05:29 -05:00			`var a = false;`
			`var b = true;`
			`var c = true;`
			`var d = false;`
			`var e = true;`
Replace the webpack+acorn transform with a Babel plugin This commit converts the pdfjsdev-loader transform into a Babel plugin, to skip a AST->string->AST round-trip. Before this commit, the webpack build process was: 1. Babel parses the code 2. Babel transforms the AST 3. Babel generates the code 4. Acorn parses the code 5. pdfjsdev-loader transforms the AST 6. @javascript-obfuscator/escodegen generates the code 7. Webpack parses the file 8. Webpack concatenates the files After this commit, it is reduced to: 1. Babel parses the code 2. Babel transforms the AST 3. babel-plugin-pdfjs-preprocessor transforms the AST 4. Babel generates the code 5. Webpack parses the file 6. Webpack concatenates the files This change improves the build time by ~25% (tested on MacBook Air M2): - `gulp lib`: 3.4s to 2.6s - `gulp dist`: 36s to 29s - `gulp generic`: 5.5s to 4.0s - `gulp mozcentral`: 4.7s to 3.2s The new Babel plugin doesn't support the `saveComments` option of pdfjsdev-loader, and it just always discards comments. Even though pdfjsdev-loader supported multiple values for that option, it was effectively ignored due to `acorn` dropping comments by default. 2024-01-22 18:33:31 +01:00			`var f = "text";`
Adds esprima-based preprocessor. 2016-05-10 18:05:29 -05:00			`var g = {`
Replace the webpack+acorn transform with a Babel plugin This commit converts the pdfjsdev-loader transform into a Babel plugin, to skip a AST->string->AST round-trip. Before this commit, the webpack build process was: 1. Babel parses the code 2. Babel transforms the AST 3. Babel generates the code 4. Acorn parses the code 5. pdfjsdev-loader transforms the AST 6. @javascript-obfuscator/escodegen generates the code 7. Webpack parses the file 8. Webpack concatenates the files After this commit, it is reduced to: 1. Babel parses the code 2. Babel transforms the AST 3. babel-plugin-pdfjs-preprocessor transforms the AST 4. Babel generates the code 5. Webpack parses the file 6. Webpack concatenates the files This change improves the build time by ~25% (tested on MacBook Air M2): - `gulp lib`: 3.4s to 2.6s - `gulp dist`: 36s to 29s - `gulp generic`: 5.5s to 4.0s - `gulp mozcentral`: 4.7s to 3.2s The new Babel plugin doesn't support the `saveComments` option of pdfjsdev-loader, and it just always discards comments. Even though pdfjsdev-loader supported multiple values for that option, it was effectively ignored due to `acorn` dropping comments by default. 2024-01-22 18:33:31 +01:00			`obj: {`
			`i: 1`
			`},`
			`j: 2`
			`};`
			`var h = {`
			`test: "test"`
Adds esprima-based preprocessor. 2016-05-10 18:05:29 -05:00			`};`
			`var i = '0';`
Replace the webpack+acorn transform with a Babel plugin This commit converts the pdfjsdev-loader transform into a Babel plugin, to skip a AST->string->AST round-trip. Before this commit, the webpack build process was: 1. Babel parses the code 2. Babel transforms the AST 3. Babel generates the code 4. Acorn parses the code 5. pdfjsdev-loader transforms the AST 6. @javascript-obfuscator/escodegen generates the code 7. Webpack parses the file 8. Webpack concatenates the files After this commit, it is reduced to: 1. Babel parses the code 2. Babel transforms the AST 3. babel-plugin-pdfjs-preprocessor transforms the AST 4. Babel generates the code 5. Webpack parses the file 6. Webpack concatenates the files This change improves the build time by ~25% (tested on MacBook Air M2): - `gulp lib`: 3.4s to 2.6s - `gulp dist`: 36s to 29s - `gulp generic`: 5.5s to 4.0s - `gulp mozcentral`: 4.7s to 3.2s The new Babel plugin doesn't support the `saveComments` option of pdfjsdev-loader, and it just always discards comments. Even though pdfjsdev-loader supported multiple values for that option, it was effectively ignored due to `acorn` dropping comments by default. 2024-01-22 18:33:31 +01:00			`var j = {`
			`i: 1`
			`};`
Fix transform of unary expression in Babel plugin All of our static evaluation & dead-code elimination transforms need to happen in post-order, transforming inner nodes first. This is so that in complex nested cases all transforms see the simplified version of their inner nodes. For example: async getNimbusExperimentData() { if (!PDFJSDev.test("GECKOVIEW")) { return null; } // other code } -> [evaluation of PDFJSDev.*] async getNimbusExperimentData() { if (!false) { return null; } // other code } -> [!false -> true] async getNimbusExperimentData() { if (true) { return null; } // other code } -> [if (true) -> replace with the if branch] async getNimbusExperimentData() { return null; // other code } -> [early return -> remove dead code] async getNimbusExperimentData() { return null; // other code } This was done correctly in all cases except for our `UnaryExpression` transform, which was happening in pre-order. 2024-01-29 11:13:48 +01:00			`var k = false;`
			`var l = true;`