javascript - After gulp-babel code uglify, sourcemaps positioning is not accurate

Question

There is the following ES6 code

let that = this;

let DOMp = document.querySelectorAll('p');
let DOMpArray = Array.prototype.slice.call(DOMp);
console.log(DOMpArray);

class Modal {
    constructor() {
        console.log('what');
        this.init();
    }
    init() {
    }
}

new Modal();

And the following gulp code

const uglify = require('gulp-uglify');
const babel = require('gulp-babel');
const sourcemaps = require('gulp-sourcemaps');
const plumber = require('gulp-plumber');
const chalk = require('chalk');
gulp.task('js', function () {
    console.log(chalk.yellow('[进行中] js(!entry_*.js ES6->ES5)'));
    return gulp.src('dev/js/test.js')
        .pipe(plumber())
        .pipe(sourcemaps.init())
        .pipe(babel())
        .pipe(uglify())
        .pipe(sourcemaps.write('./maps'))
        .pipe(gulp.dest(`./static/js/`))
        .on('end', function () {
            console.log(chalk.green('[已完成] js(!entry_*.js ES6->ES5)'));
        });
});

The browser executes the generated js output to the console, and the line of code located when clicking on the file is incorrect. Is there something wrong with my usage?

Answer 1

The location is wrong.

const uglify = require('gulp-uglify');
const babel = require('gulp-babel');
const sourcemaps = require('gulp-sourcemaps');
const plumber = require('gulp-plumber');
const chalk = require('chalk');
gulp.task('js', function () {
    console.log(chalk.yellow('[进行中] js(!entry_*.js ES6->ES5)'));
    return gulp.src('dev/js/test.js')
        .pipe(sourcemaps.init()) // <------ 这里
        .pipe(plumber())    // <------ 这里
        .pipe(babel())
        .pipe(uglify())
        .pipe(sourcemaps.write('./maps'))
        .pipe(gulp.dest(`./static/js/`))
        .on('end', function () {
            console.log(chalk.green('[已完成] js(!entry_*.js ES6->ES5)'));
        });
});

Reference:

• https://stackoverflow.com/que...

• https://fettblog.eu/gulp-4-so...