Question

我之所以来找你，是因为几天来我一直没有解决问题的方法。

版本：CLI版本：2.3.0 本地版本：3.9.1

节点：v12.18.4

当我启动命令yarn run dev（或简化gulp dev）时，我的任务是dev，参数问题，我之前的dev意识到了这段代码：

    const path = require('path');

// Filters out non .js files. Prevents
// accidental inclusion of possible hidden files
export default function(name) {

  return /(\.(js)$)/i.test(path.extname(name));

};

这是下面的错误：

yarn run v1.22.5
$ cross-env BABEL_DISABLE_CACHE=1 NODE_ENV=development ./node_modules/.bin/gulp dev
[12:04:55] Requiring external module @babel/register
/Users/nicolas/vanam_dev/frontend/gulp/util/scriptFilter.js:5
export default function (name) {
^^^^^^

SyntaxError: Unexpected token 'export'
    at wrapSafe (internal/modules/cjs/loader.js:1053:16)
    at Module._compile (internal/modules/cjs/loader.js:1101:27)
    at Module._compile (/Users/nicolas/vanam_dev/frontend/node_modules/pirates/lib/index.js:99:24)
    at Module._extensions..js (internal/modules/cjs/loader.js:1157:10)
    at Object.newLoader [as .js] (/Users/nicolas/vanam_dev/frontend/node_modules/pirates/lib/index.js:104:7)
    at Module.load (internal/modules/cjs/loader.js:985:32)
    at Function.Module._load (internal/modules/cjs/loader.js:878:14)
    at Module.require (internal/modules/cjs/loader.js:1025:19)
    at require (internal/modules/cjs/helpers.js:72:18)
    at Object.<anonymous> (/Users/nicolas/vanam_dev/frontend/gulp/index.js:3:19)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

预先感谢您，希望您能够为我解锁。

Answer 1

您正在使用ES6语法。

尝试使用node.js

函数return_name（名称）{ return /(\.(js)$)/i.test(path.extname(name)); }

module.exports = { return_name }

Answer 2

在使用Node v.12时，您不能仅使用导出和导入（这是ES6或Javascript 6的一部分），而不必将代码转换为ES5（可用于节点）。您可以使用babel来转换代码或修改调用节点以启动程序的方式。可以找到here

如果您是负责现有项目的新开发人员，那么肯定已经可以使用一种解决方法。

Answer 3

Subhadip非常感谢您的使用，在我的yarn run dev之后出现了一个新错误：

yarn run v1.22.5
$ cross-env BABEL_DISABLE_CACHE=1 NODE_ENV=development ./node_modules/.bin/gulp dev
[14:07:09] Requiring external module @babel/register
/Users/nicolas/vanam_dev/frontend/gulp/index.js:7
const tasks = fs.readdirSync('./gulp/tasks/').filter(onlyScripts); // Ensure process ends after all Gulp tasks are finished
                                              ^

TypeError: #<Object> is not a function
    at Array.filter (<anonymous>)
    at Object.<anonymous> (/Users/nicolas/vanam_dev/frontend/gulp/index.js:5:47)
    at Module._compile (internal/modules/cjs/loader.js:1137:30)
    at Module._compile (/Users/nicolas/vanam_dev/frontend/node_modules/pirates/lib/index.js:99:24)
    at Module._extensions..js (internal/modules/cjs/loader.js:1157:10)
    at Object.newLoader [as .js] (/Users/nicolas/vanam_dev/frontend/node_modules/pirates/lib/index.js:104:7)
    at Module.load (internal/modules/cjs/loader.js:985:32)
    at Function.Module._load (internal/modules/cjs/loader.js:878:14)
    at Module.require (internal/modules/cjs/loader.js:1025:19)
    at require (internal/modules/cjs/helpers.js:72:18)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

我的代码在此行：

const fs = require('fs');
const gulp = require('gulp');
var onlyScripts = require('./util/scriptFilter');

const tasks = fs.readdirSync('./gulp/tasks/').filter(onlyScripts);

// Ensure process ends after all Gulp tasks are finished
gulp.on('stop', function () {
  if ( !global.isWatching ) {
    process.nextTick(function () {
      process.exit(0);
    });
  }
});

tasks.forEach((task) => {
  require('./tasks/' + task);
});

为我的任务开发人员编写代码：

import gulp        from 'gulp';
import runSequence from 'run-sequence';

gulp.task('dev', ['clean'], function(cb) {

  global.isProd = false;

  runSequence(['styles','vendors', 'fonts', 'views'], 'browserify', 'watch', cb);
  // runSequence(['styles','vendors', 'images', 'fonts', 'views'], 'browserify', 'watch', cb);

});

如何解决我的错误导出默认功能

3 个答案: