.css.map除了 CSS 文件之外，如何编译 LESS 文件以输出源映射文件 ( )？有没有办法在命令行（NodeJS's lessc）和任何基于 GUI 的程序上做到这一点？
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3 回答
23
更新：新的最短答案
文档已更新！随着新功能越来越少，有时文档会落后一点，所以如果您正在寻找最前沿的功能，您最好还是运行lessc（查看更长的答案）并检查帮助文本中弹出的内容。
简短的回答
您正在从命令行中寻找以下任意数量的选项：
--source-map[=FILENAME] Outputs a v3 sourcemap to the filename (or output filename.map)
--source-map-rootpath=X adds this path onto the sourcemap filename and less file paths
--source-map-basepath=X Sets sourcemap base path, defaults to current working directory.
--source-map-less-inline puts the less files into the map instead of referencing them
--source-map-map-inline puts the map (and any less files) into the output css file
--source-map-url=URL the complete url and filename put in the less file
在我写这篇文章时，我不知道任何生成地图的 GUI 选项（源地图仅在过去几个月中添加到 LESS）——很抱歉没有更好的消息。我相信他们会在明年更新时增加支持。
更长的答案
如果您从命令行运行 lessc 而不使用任何参数，它将为您提供所有选项。（根据我的经验，这比他们的文档更新，所以它至少可以让你指出正确的方向。）包括所有最新的地图资料。
用于 dev 的最简单的组合是--source-map-less-inline --source-map-map-inline，它将为您提供嵌入在输出 css 中的源映射。
如果您想添加一个单独的地图文件，您可以使用--source-mapwhich, frommy.less将输出my.css和my.css.map
供参考：当我运行我的副本（目前是 v 1.6.1）时，我得到
usage: lessc [option option=parameter ...] <source> [destination]
If source is set to `-' (dash or hyphen-minus), input is read from stdin.
options:
-h, --help Print help (this message) and exit.
--include-path=PATHS Set include paths. Separated by `:'. Use `;' on Windows.
-M, --depends Output a makefile import dependency list to stdout
--no-color Disable colorized output.
--no-ie-compat Disable IE compatibility checks.
--no-js Disable JavaScript in less files
-l, --lint Syntax check only (lint).
-s, --silent Suppress output of error messages.
--strict-imports Force evaluation of imports.
--insecure Allow imports from insecure https hosts.
-v, --version Print version number and exit.
-x, --compress Compress output by removing some whitespaces.
--clean-css Compress output using clean-css
--clean-option=opt:val Pass an option to clean css, using CLI arguments from
https://github.com/GoalSmashers/clean-css e.g.
--clean-option=--selectors-merge-mode:ie8
and to switch on advanced use --clean-option=--advanced
--source-map[=FILENAME] Outputs a v3 sourcemap to the filename (or output filename.map)
--source-map-rootpath=X adds this path onto the sourcemap filename and less file paths
--source-map-basepath=X Sets sourcemap base path, defaults to current working directory.
--source-map-less-inline puts the less files into the map instead of referencing them
--source-map-map-inline puts the map (and any less files) into the output css file
--source-map-url=URL the complete url and filename put in the less file
-rp, --rootpath=URL Set rootpath for url rewriting in relative imports and urls.
Works with or without the relative-urls option.
-ru, --relative-urls re-write relative urls to the base less file.
-sm=on|off Turn on or off strict math, where in strict mode, math
--strict-math=on|off requires brackets. This option may default to on and then
be removed in the future.
-su=on|off Allow mixed units, e.g. 1px+1em or 1px*1px which have units
--strict-units=on|off that cannot be represented.
--global-var='VAR=VALUE' Defines a variable that can be referenced by the file.
--modify-var='VAR=VALUE' Modifies a variable already declared in the file.
-------------------------- Deprecated ----------------
-O0, -O1, -O2 Set the parser's optimization level. The lower
the number, the less nodes it will create in the
tree. This could matter for debugging, or if you
want to access the individual nodes in the tree.
--line-numbers=TYPE Outputs filename and line numbers.
TYPE can be either 'comments', which will output
the debug info within comments, 'mediaquery'
that will output the information within a fake
media query which is compatible with the SASS
format, and 'all' which will do both.
--verbose Be verbose.
于 2014-01-30T17:11:17.437 回答
7
如果命令行不适合你，Grunt 很擅长这种类型的事情。您可以配置 grunt-contrib-less 插件以使用如下配置生成内联地图：
less: {
options: {
sourceMap:true,
outputSourceFiles: true
},
lessFiles: {
expand: true,
flatten:false,
src: ['**/*.less'],
dest: ['dist/'],
ext: '.css',
}
},
于 2014-09-08T20:19:55.610 回答
0
从 Less 文件创建地图和 CSS 文件的示例
- 安装最新的Node JS并转到命令提示符并运行
npm install less，现在安装成功了 - 转到命令提示符并移动到我们要创建的较少文件夹
例如，我要更改 HelloWorld [Less File]
在命令提示符下转到 C:\Project\CSS 或在以下命令中提供正确的路径。
在命令提示符中运行以下命令
lessc HelloWorld.less HelloWorld.css --source-map=HelloWorld.css.map --verbose
现在 CSS 和 Map 文件在各自的文件夹中生成。
如需更多参考，请查看链接：royarun.blogspot.com
于 2018-04-28T13:44:02.710 回答