您是否添加了索引任务的选项?
```
/**
* The `index` task compiles the `index.html` file as a Grunt template. CSS
* and JS files co-exist here but they get split apart later.
*/
index: {
/**
* During development, we don't want to have wait for compilation,
* concatenation, minification, etc. So to avoid these steps, we simply
* add all script files directly to the `<head>` of `index.html`. The
* `src` property contains the list of included files.
*/
build: {
dir: '<%= build_dir %>',
src: [
'<%= vendor_files.js %>',
'<%= build_dir %>/src/**/*.js',
'<%= html2js.common.dest %>',
'<%= html2js.app.dest %>',
'<%= vendor_files.css %>',
'<%= recess.build.dest %>'
]
},
/**
* When it is time to have a completely compiled application, we can
* alter the above to include only a single JavaScript and a single CSS
* file. Now we're back!
*/
compile: {
dir: '<%= compile_dir %>',
src: [
'<%= concat.compile_js.dest %>',
'<%= vendor_files.css %>',
'<%= recess.compile.dest %>'
]
}
},
```