has no method ' watch'"-6ren"> has no method ' watch'"-所以我在 gulpfile.js 中添加了一个监视任务,如下所示: gulp.task('watch', function(){ gulp.watch('src/style/*.less', -6ren">
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javascript - 使用 gulp.watch 会抛出 "TypeError: Object # has no method ' watch'"
转载 作者:太空宇宙 更新时间:2023-11-04 00:48:33 25 4
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所以我在 gulpfile.js 中添加了一个监视任务,如下所示:

gulp.task('watch', function(){

gulp.watch('src/style/*.less', ['css']);
});

但是当我运行它时(gulp watch),我收到以下错误:

PS C:\Projects\web\basic> gulp watch
[21:28:42] Using gulpfile C:\Projects\web\basic\gulpfile.js
[21:28:42] Starting 'watch'...
[21:28:42] 'watch' errored after 226 μs
[21:28:42] TypeError: Object #<Object> has no method 'watch'
at Gulp.watch (C:\Projects\web\basic\node_modules\gulp\index.js:40:14)
at Gulp.<anonymous> (C:\Projects\web\basic\gulpfile.js:37:7)
at module.exports (C:\Projects\web\basic\node_modules\gulp\node_modules\orchestrator\lib\runTask.js:34:7)
at Gulp.Orchestrator._runTask (C:\Projects\web\basic\node_modules\gulp\node_modules\orchestrator\index.js:273:3)
at Gulp.Orchestrator._runStep (C:\Projects\web\basic\node_modules\gulp\node_modules\orchestrator\index.js:214:10)
at Gulp.Orchestrator.start (C:\Projects\web\basic\node_modules\gulp\node_modules\orchestrator\index.js:134:8)
at C:\Users\Magnus\AppData\Roaming\npm\node_modules\gulp\bin\gulp.js:129:20
at process._tickCallback (node.js:415:13)
at Function.Module.runMain (module.js:499:11)
at startup (node.js:119:16)

据我了解, watch built-in function in gulp 那么我在这里做错了什么?我见过的解决这个困境的唯一其他解决方案是 Linux 特定的(并且可能是问题的原因)。它在 this SO-thread 中有描述。 ,但我使用的是 Windows,我看不出该问题如何在 Windows 环境中出现。

此外,我还查看了用于项目安装的 Gulp index.js 文件,它确实包含一个 watch 原型(prototype),但问题似乎(根据错误消息)来自监视函数中的最后一行:

Gulp.prototype.watch = function(glob, opt, fn) {
if (typeof opt === 'function' || Array.isArray(opt)) {
fn = opt;
opt = null;
}

// Array of tasks given
if (Array.isArray(fn)) {
return vfs.watch(glob, opt, function() {
this.start.apply(this, fn);
}.bind(this));
}

return vfs.watch(glob, opt, fn);
};

正是 return vfs.watch(glob, opt, fn); 行导致了崩溃(第 40 行)。在本例中,vfs 是一个包含 vinyl-fs 的变量,如下所示:

var vfs = require('vinyl-fs');

但即使在我的项目和全局中手动安装它之后,它仍然无法工作。任何人都知道可能导致此崩溃的原因是什么?

编辑:完整的 gulpfile.js:

var gulp = require('gulp'),
less = require('gulp-less'),
concat = require('gulp-concat'),
uglify = require('gulp-uglify');

var cssPath = 'src/style/*.less';
var jsPath = 'src/js/*.js';
var htmlPath = 'src/index.htm';
var assetPath = 'src/assets/*';

gulp.task('css', function() {
return gulp.src(cssPath) //Get all less files from src/style/
.pipe(less()) //Pass them on to less
.pipe(concat('style.css')) //Concat all files to one big style.css-file
.pipe(gulp.dest('dist/style')) //Pass the less result to gulp so it can be moved to dist/css
});

gulp.task('js', function(){
return gulp.src(jsPath) //Get all the javascript files from src/js/
.pipe(uglify()) //Pass them on to uglify
.pipe(concat('all.js')) //Concat all the files into one javascript file
.pipe(gulp.dest('dist/js')) //Pass the result to gulp so it can be moved to dist/js
});

gulp.task('html', function(){
return gulp.src(htmlPath)
.pipe(gulp.dest('dist'))
});

gulp.task('assets', function(){
return gulp.src(assetPath)
.pipe(gulp.dest('dist/assets'))
});

gulp.task('watch', function(){

gulp.watch(cssPath, ['css']);
gulp.watch(jsPath, ['js']);
gulp.watch(htmlPath, ['html']);
gulp.watch(assetPath, ['assets']);
});

gulp.task('default', ['css', 'js', 'html', 'assets']);

最佳答案

感谢@ezrepotein 和@entre 帮助我。

解决方案很简单,重新安装node,然后卸载并重新安装项目中的所有gulp组件。之后一切顺利,所以在安装 Node 或 gulp 组件期间一定出了问题。

关于javascript - 使用 gulp.watch 会抛出 "TypeError: Object #<Object> has no method ' watch'",我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/33587626/

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