Error: Undefined variable in JavaScript obfuscation

My website has several small JavaScript files that I currently merge into one file and then minimize using terser. The website functions perfectly with the minimized version.

Now, I want to take it a step further and obfuscate the code using JavaScript-Obfuscator (). I have set up a gulp task to generate the obfuscated version:

gulp.task('obfus', function() {
    gulp.src('src/main/webapp/js/mysite.min.js')
        .pipe(javascriptObfuscator({
                compact: true
        })).pipe(gulp.dest('src/main/webapp/js/dist'));
});

However, when I tried to run the website after obfuscation, I encountered this error:

Uncaught ReferenceError: loc is not defined
    at eval (eval at exampledomain.<computed> (mysite.min.js?:1:71178), <anonymous>:1:39)

The line of code causing the error is as follows:

eval('exampledomain.build' + type + '(loc)');

I am utilizing "eval" to dynamically call different functions based on the variable "type."

How can I resolve this issue?

javascriptobfuscation

Answer №1

gulp.task('obfuscate', function() {
  return gulp.src('src/main/webapp/js/mysite.min.js')
    .pipe(javascriptObfuscator({
      compact: true
    }))
    .pipe(gulp.dest('src/main/webapp/js/dist'));
});

Modifications made:

Included a return statement before the gulp.src call to ensure proper handling of errors by Gulp.

Implemented indentation for improved code readability and understanding.

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