Terser

首先安装 Terser。由于 Terser 的目的是破坏你的代码，我们还需要安装 vinyl-buffer 和 gulp-sourcemaps 来保持 sourcemaps 工作。

First install Terser. Since the point of Terser is to mangle your code, we also need to install vinyl-buffer and gulp-sourcemaps to keep sourcemaps working.

npm install --save-dev gulp-terser vinyl-buffer gulp-sourcemaps

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var gulp = require("gulp");
var browserify = require("browserify");
var source = require("vinyl-source-stream");
var terser = require("gulp-terser");
var tsify = require("tsify");
var sourcemaps = require("gulp-sourcemaps");
var buffer = require("vinyl-buffer");
var paths = {
  pages: ["src/*.html"],
};

gulp.task("copy-html", function () {
  return gulp.src(paths.pages).pipe(gulp.dest("dist"));
});

gulp.task(
  "default",
  gulp.series(gulp.parallel("copy-html"), function () {
    return browserify({
      basedir: ".",
      debug: true,
      entries: ["src/main.ts"],
      cache: {},
      packageCache: {},
    })
      .plugin(tsify)
      .bundle()
      .pipe(source("bundle.js"))
      .pipe(buffer())
      .pipe(sourcemaps.init({ loadMaps: true }))
      .pipe(terser())
      .pipe(sourcemaps.write("./"))
      .pipe(gulp.dest("dist"));
  })
);

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gulp
cat dist/bundle.js