Hi, any idea why this error is happening?

[17:24:11] TypeError in plugin "terser" Message: The first argument must be of type string or an instance of Buffer, ArrayBuffer, or Array or an Array-like Object. Received undefined Details: code: ERR_INVALID_ARG_TYPE domainEmitter: [object Object] domainThrown: false

when using the following code, which worked 2 weeks ago:

gulp.task('build:scripts', function () { return gulp.src(config.app_files.js) .pipe(sourcemaps.init()) .pipe(rollup({ }, { format: 'cjs', strict: false })) .pipe(concat('script.js')) .pipe(terser()) .pipe(rename(function (path) { path.extname = ".min.js" })) .pipe(sourcemaps.write('.', { mapFile: function (mapFilePath) { return mapFilePath.replace('.js.map', '.map'); } })) .pipe(gulp.dest(config.build_dir)); });

Thanks!

The following code should take the file from js/ folder and write it into build/js/ but it writes it to ./build root.

const gulp = require('gulp');
const terser = require('gulp-terser');

gulp.task('default', function (callback) {
    return gulp.src('./js/index.js')
    .pipe(terser())
    .pipe(gulp.dest('./build'));
});

I know I could change to where it writes, the bigger problem arises when you have multiple folders with JS code and use: **/*.js and then doesnt write to the corresponding folders.....
Here is a tiny demo: gulp-terser.zip

I keep on getting the following error when doing any yarn add/remove operations:

warning [email protected]: The engine "terser" appears to be invalid.

Is there something that I'm missing?

Apologies if this is a very simple solution! Just starting out with gulp. When I run the how to use example, I get the following exception:

Error: No valid exports main found for '----/node_modules/terser'
    at resolveExportsTarget (internal/modules/cjs/loader.js:625:9)
    at applyExports (internal/modules/cjs/loader.js:502:14)
    at resolveExports (internal/modules/cjs/loader.js:551:12)
    at Function.Module._findPath (internal/modules/cjs/loader.js:657:22)
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:960:27)
    at Function.Module._load (internal/modules/cjs/loader.js:855:27)
    at Module.require (internal/modules/cjs/loader.js:1033:19)
    at require (internal/modules/cjs/helpers.js:72:18)
    at Object.<anonymous> (------/node_modules/gulp-terser/lib/index.js:7:38)
    at Module._compile (internal/modules/cjs/loader.js:1144:30) {
  code: 'MODULE_NOT_FOUND'

Can anyone advise whats causing this?

node v13.6.0

So I'm trying to use gulp-terser and which to use the keep_quoted like::

function terser() {
    return gulp.src('js/**/*.js')
        .pipe(gTerser({
            keep_fnames: false, 
            keep_quoted: true,  // <====== doesn't work here
            mangle: {
                 keep_quoted: true,  // <==== neither here
                properties: true,
                keep_fnames: false,
            }
        }))
        .pipe(gulp.dest(`${destStatic}/js/`))
}

but sadly keep getting error: keep_quoted is not a supported option

+--------------------
+-- VERSIONS
+--------------------
+-- [email protected]
+-- [email protected]
+-- [email protected]
+--------------------

Hello,

I switched from gulp-uglifyes to gulp-terser but i got this error:

TypeError: Cannot read property 'file' of undefined
at DestroyableTransform._transform (/%project_path%/node_modules/gulp-terser/lib/index.js:41:30)

Any clue?

Thank you very much,
Alban

const minifyDistJs = () => src(paths.dist.js + '/adminlte.js', { sourcemaps: true })
    .pipe(terser({
      compress: {
        passes: 2
      }
    }))
    .pipe(rename({ suffix: '.min' }))
    .pipe(dest(paths.dist.js), { sourcemaps: '.' })

not creating sourcemaps

I'm using gulp-terser with additional terser options and my gulpfile is as follows:

require! 'gulp-terser': terser

my-uglify = (x) ->
    terser x, {-mangle, +keep_fnames}
    .on \error, gutil.log

gulp.task \browserify, ->
        get-bundler file
            .bundle!
            ...
            .pipe if-else optimize-for-production, my-uglify

It turns out, gulp-terser is a factory function, so the solution is:

Solution

my-uglify = (x) ->
    terser({-mangle, +keep_fnames})(x)
    .on \error, gutil.log

This should be added into the documentation.

Unlike gulp-uglify, gulp-terser does not have support for gulp-sourcemaps, but instead garbles outputted sourcemaps.

Can this be added?

This plugin uses terser 5.9.0 which is insecure, see: GHSA-4wf5-vphf-c2xc

I have a basic JS file here:

function helloworld(someparameter)
{  
    console.log("Hello World");    
    return someparameter;    
}

I also have this basic gulp task:

function minifyJs(cb) {  
    pump([  
        gulp.src("public/**/*.js"),  
        terser(),  
        gulp.dest("public")  
    ], cb);  
}

By default according to
https://github.com/terser-js/terser#minify-options
This should mangle and not keep function names or anything. But it creates this:

function helloworld(l){return console.log("Hello World"),l}

This is keeping function names?
I also explicity set keep_fnames to false but still nothing

Where Module.js is an ES6 module,

gulp.src('Module.js')
    .pipe(gulpTerser({module: true}))
    .pipe(gulp.dest('public/js'))

results in

SyntaxError in plugin "terser"
Message:
    Unexpected token: eof (undefined)
Details:
    filename: 0
    ...

while

gulp.src('script.js')
    .pipe(gulpTerser())
    .pipe(gulp.dest('public/js'))

does not.

Upgrading terser to latest (5.5.1) appears to resolve.

There has been development on a new fork of uglify-es, which is now called terser and has its own package!

"terser": "^3.7.3"

Please upgrade to our new version.

Suddenly running into the following error with gulp

[11:15:25] TypeError in plugin "terser"
[INFO] Message:
[INFO] The first argument must be one of type string, Buffer, ArrayBuffer, Array, or Array-like Object. Received type undefined
[INFO] Details:
[INFO] code: ERR_INVALID_ARG_TYPE
[INFO] domainEmitter: [object Object]
[INFO] domainThrown: false
[INFO]
[INFO] [11:15:25] 'build' errored after 1.35 s
[INFO] npm ERR! code ELIFECYCLE

Running version "gulp-terser": "~1.2.0"
Node version v12.14.0

Possibly related to Issue #14

Getting an error:

TypeError in plugin "terser"
Message:
    Cannot read property 'isPromise' of undefined

Configuration:

gulp
    .src(files.js.src)
    .pipe(terser())
    .on('error', function (error) {
      console.error('Error in js.src compress task', error.toString());
    })
    .pipe(concat('admin.min.js'))
    .pipe(gulp.dest(path.js.build));

Versions:
[email protected]
[email protected]
[email protected]
[email protected]

This repo doesn't appear to have a changelog or releases, other than those listed on https://www.npmjs.com/package/gulp-terser. Are changes per release listed anywhere? I had to look into the commit for the latest release.

I am trying to use gulp-terser to run terser against js files that were compiled from TypeScript. The TypeScript compiler generated sourcemaps when it ran, and in this source map, "sources" lists my .ts file, as I would expect. When gulp-terser runs, however, it's as if the source map is generated from scratch. "sources" ends up listing the .js file instead of the original .ts file as expected.

Looking at the code, I don't see terser's sourceMap.content being set from chunk.sourceMap. Only sourceMap.filename is set. The terser doc says "The value of filename is only used to set file attribute (see the spec) in source map file.... If you're compressing compiled JavaScript and have a source map for it, you can use sourceMap.content".

Does this plugin support source maps that were previously loaded?

Please & thanks!

error:

Plumber found unhandled error:
 TypeError [ERR_INVALID_ARG_TYPE] in plugin "terser"
Message:
    The first argument must be one of type string, Buffer, ArrayBuffer, Array, or Array-like Object. Received type undefined

I am using this code:

const gulp = require('gulp');
const terser = require('gulp-terser');

gulp.task('default', function() {
  return gulp.src(['js/*.js'])
    .pipe(plumber())
    .pipe(terser())
    .pipe(gulp.dest('../assets/js'));
});

I also tried to pass {ecma:8} in terser as .pipe(terser({ecma:8})) but it doesn't resolve the problem.

I have faced a issue when running v1.3.2 at node_modules/terser/dist/bundle.min.js:23478

Location of the error:
async function minify(files, options)

Error message:
SyntaxError: Unexpected token function

Please update published version in registry.
fix: unhandled promise rejection error (committed on 14 Sep ) is not presented in "built" version that's installed on npm install.
1.4.0 tag was created on 23 Aug.

Using some libs after gulp-terser is run js errors are caused:

libs.js:4 Uncaught TypeError: Cannot set property window of # which has only a getter.

So I created a test folder and setup the following:

1. CMD: npm init -y
2. CMD: npm i -S gsap gulp gulp-contact gulp-terser gulp-rename
3. Create gulpfile.js

const gulp = require("gulp");
const concat = require('gulp-concat');
const terser = require('gulp-terser');

let jsFiles = [
   "./node_modules/gsap/dist/gsap.js",
];
 
let buildLibsProd = function (done) {
    gulp.src(jsFiles)
        .pipe(concat('libs.min.js'))
        .pipe(terser())
        .on("error", function (e) {
            console.log(e.toString());
            this.emit("end");
        })
        .pipe(gulp.dest('./'));
    done();
};
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
gulp.task("build", gulp.parallel(
    buildLibsProd
));
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

4. Run gulp build
5. Create index.html
6. Add script tag link in head to libs.min.js (will give you console log error).
7. Comment out script tag from point 6 and add another script tag link in head to ./node_modules/gsap/dist/gsap.min.js (no console errors)

Any ideas?

gulp.src(source, { base, sourcemaps })
        .pipe(tsProject())
        .pipe(gulpIf(!!minify, terser({ safari10: true })))
        .pipe(gulp.dest(target, this.returnSourcemaps(sourcemaps)))
        .on('end', () => resolve(true))

With [email protected] & [email protected], got this error message.
Need help.

For example, I have wrapped terser with my customized logic, and exported a same interface. With gulp-uglify, I can use its composer.js to call my API, but gulp-terser always use require('terser').