在这种情况下，我不明白为什么警报是'use-strict';
const gulp = require('gulp');
const $ = require('gulp-load-plugins')({ lazy: true });
const browserify = require('browserify');
const source = require('vinyl-source-stream');
const buffer = require('vinyl-buffer');
const paths = require('../../paths.js');
const config = require('../../config.js')();
gulp.task('eslint', () => {
console.log('-> Running eslint');
// Select files
gulp.src(`${paths.to.js.in}/**/*.js`)
// Prevent pipe breaking caused by errors from gulp plugins
.pipe($.plumber())
// Check for lint errors
.pipe($.eslint())
// eslint.format() outputs the lint results to the console.
// Alternatively use eslint.formatEach() (see Docs).
.pipe($.eslint.format())
// To have the process exit with an error code (1) on
// lint error, return the stream and pipe to failAfterError last.
.pipe($.eslint.failAfterError());
});
gulp.task('js', ['eslint'], () => {
const env = ((config.environment || process.env.NODE_ENV || 'development').trim().toLowerCase() !== 'production');
console.log(`-> Compiling JavaScript for ${config.environment}`);
// Obtain a readable stream containing the processed browserified bundle
const bundle = browserify({
entries: paths.to.js.in,
debug: env,
})
.bundle()
// Convert browserify stream to a gulp-readable steam & buffer
.pipe(source(config.js.name))
.pipe(buffer());
if (env) {
// Select bundle
bundle
// Initialize sourcemaps
.pipe($.sourcemaps.init())
// Prevent pipe breaking caused by errors from gulp plugins
.pipe($.plumber())
// Concatenate includes
.pipe($.include({
includePaths: [`${paths.to.js.in}`],
}))
// Transpile
.pipe($.babel())
// Catch errors
.pipe($.errorHandle())
// Save sourcemaps
.pipe($.sourcemaps.write('.'))
// Save unminified file
.pipe(gulp.dest(`${paths.to.js.out}`));
} else {
// Select bundle
bundle
// Prevent pipe breaking caused by errors from gulp plugins
.pipe($.plumber())
// Concatenate includes
.pipe($.include({
includePaths: [`${paths.to.js.in}`],
}))
// Transpile
.pipe($.babel())
// Catch errors
.pipe($.errorHandle())
// Show file-size before compression
.pipe($.size({ title: 'Javascript In Size' }))
// Optimize and minify
.pipe($.terser())
// Show file-size after compression
.pipe($.size({ title: 'Javascript Out Size' }))
// Append suffix
.pipe($.rename({
suffix: '.min',
}))
// Save minified file
.pipe(gulp.dest(`${paths.to.js.out}`));
}
});
undefined据我了解，问题var name = 'Alice';
function init() {
var name = "Zara";
function displayName() {
var name = name;
alert(name);
}
name = 'John';
return displayName;
}
var displayName = init();
name = 'Ben';
displayName();
是存在的，但是我不知道为什么函数没有从var name = name函数中分配name。
谢谢您的帮助。
答案 0 :(得分：-1)
name关键字冲突。因此，请使用此关键字。
var name = 'Alice';
function init()
{
var name = "Zara";
function displayName() {
this.name = name;
alert(name);
}
name = 'John';
return displayName;
}
var displayName = init();
name = 'Ben';
displayName();