这篇要讲的是Bundling，我看很多人把它翻译为捆绑，如果你喜欢你也可以这么理解，我是不太习惯，我还是喜欢它为bundling，或者bundle。
Bundling允许我们组合和压缩相同类型的文件来提升网站的性能。
Web Essentials的bundle文件是用于组合和压缩相同类型的一组文件的一个食谱，它可以限制浏览器将要下载的数据量。
Web Essentials提供了两种bundling类型：
创建一个bundle的步骤和所有类型文件的步骤是相同的：
基本上，有两种方法来更新bundled的资产（就是放在bundle中的资源文件）：
我刚才已经创建了一个bundle文件，名字为是默认的MyBundle。我将刚才生成的XML文件内容放在下面。可以看到，生成的XML文件已经自己注释好了，只不过是英文的注释。
<?xml version="1.0" encoding="utf-8"?><bundle xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://vswebessentials.com/schemas/v1/bundle.xsd"> <settings> <!--Determines if the bundle file should be automatically optimized after creation/update.--> <minify>true</minify> <!--Determine whether to generate/re-generate this bundle on building the solution.--> <runOnBuild>false</runOnBuild> <!--Use absolute path in the generated CSS files. By default, the URLs are relative to generated bundled CSS file.--> <adjustRelativePaths>true</adjustRelativePaths> <!--Specifies a custom subfolder to save files to. By default, compiled output will be placed in the same folder and nested under the original file.--> <outputDirectory /> </settings> <!--The order of the <file> elements determines the order of the files in the bundle.--> <files> <file>/Content/themes/base/jquery-ui.css</file> <file>/Content/themes/base/jquery.ui.accordion.css</file> <file>/Content/themes/base/jquery.ui.all.css</file> </files></bundle>
下面我在创建一个sprite文件：
对应的XML类型的sprite文件内容如下：
<?xml version="1.0" encoding="utf-8"?><sprite xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://vswebessentials.com/schemas/v1/sprite.xsd"> <settings> <!--Determines if the sprite image should be automatically optimized after creation/update.--> <optimize>true</optimize> <!--Determines the orientation of images to form this sprite. The value must be vertical or horizontal.--> <orientation>vertical</orientation> <!--The margin (in pixel) around and between the constituent images.--> <margin>1</margin> <!--File extension of sprite image.--> <outputType>png</outputType> <!--Determine whether to generate/re-generate this sprite on building the solution.--> <runOnBuild>false</runOnBuild> <!--Use full path to generate unique class or mixin name in CSS, LESS and SASS files. Consider disabling this if you want class names to be filename only.--> <fullPathForIdentifierName>true</fullPathForIdentifierName> <!--Use absolute path in the generated CSS-like files. By default, the URLs are relative to sprite image file (and the location of CSS, LESS and SCSS).--> <useAbsoluteUrl>false</useAbsoluteUrl> <!--Specifies a custom subfolder to save files to. By default, compiled output will be placed in the same folder and nested under the original file.--> <outputDirectory /> <!--Specifies a custom subfolder to save CSS files to. By default, compiled output will be placed in the same folder and nested under the original file.--> <outputDirectoryForCss /> <!--Specifies a custom subfolder to save LESS files to. By default, compiled output will be placed in the same folder and nested under the original file.--> <outputDirectoryForLess /> <!--Specifies a custom subfolder to save SCSS files to. By default, compiled output will be placed in the same folder and nested under the original file.--> <outputDirectoryForScss /> </settings> <!--The order of the <file> elements determines the order of the images in the sprite.--> <files> <file>/Content/themes/base/images/ui-bg_flat_0_aaaaaa_40x100.png</file> <file>/Content/themes/base/images/ui-bg_flat_75_ffffff_40x100.png</file> <file>/Content/themes/base/images/ui-bg_glass_55_fbf9ee_1x400.png</file> </files></sprite>
当为一个目录生成一个bundle时，文件的列表来自文件系统，而不是该VS项目。因此，如果该目录包含的文件没有包括在项目中，它们也会包括在sprite中。为了阻止这种情况，必须手动选择所有的文件而不是该目录。
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