Visual Studio Gulp Babel Resolve Imports

Question

如何让gulp-babel解析js文件的导入。因为现在它在视觉工作室中运行没有错误，但导入没有解决。是否需要指定要导入的模块的源目录 - 如何在 gulpfile.js 中执行此操作？

古尔普文件.js

"use strict";
var gulp = require("gulp");
var babel = require("gulp-babel");
gulp.task("js", function () {
return gulp.src('./wwwroot/js/app.js')
.pipe(babel())
. pipe(gulp.dest('./wwwroot/js/babel'));
});

应用.js：

import { MDCRipple } from '@material/ripple';
import { MDCTextField } from '@material/textfield';
const username = new MDCTextField(document.querySelector('.username'));
const password = new MDCTextField(document.querySelector('.password'));
new MDCRipple(document.querySelector('.cancel'));
new MDCRipple(document.querySelector('.next'));

Answer 1

这解决了这个问题：

https://github.com/babel/babelify/issues/247

在我目前的理解中，问题是：依赖项没有被转译为浏览器可以理解的javascript版本。

[什么有效]

gulpfile.js：

"use strict";
var gulp = require("gulp");
var browserify = require('browserify');
var source = require('vinyl-source-stream');
var babelify = require('babelify');
gulp.task("js", function () {
browserify('./wwwroot/js/app.js')
.transform("babelify", {
global: true,
presets: ["es2015", "es2016", "stage-0"],
ignore: //node_modules/underscore/
})
.bundle()
.pipe(source('babel.js'))
.pipe(gulp.dest('./wwwroot/js'));
});

package.json：

{
"version": "1.0.0",
"name": "asp.net",
"private": true,
"devDependencies": {
"babel-core": "6.26.3",
"gulp": "3.9.1",
"browserify": "15.0.0",
"babelify": "8.0.0",
"babel-preset-es2015": "6.24.1",
"babel-preset-es2016": "6.24.1",
"babel-preset-stage-0": "6.24.1",
"vinyl-source-stream": "2.0.0",
"material-components-web": "0.28.0"
}
}