xmlchars

2019-05-17 admin

xmlchars是什么

什么是xmlchars,Utilities for determining if characters belong to character classes defined by the XML specs.

xmlchars使用教程帮助文档

Utilities for determining whether characters belong to character classes defined by the XML specs.

Organization

It used to be that the library was contained in a single file and you could just import/require/what-have-you the xmlchars module. However, that setup did not work well for people who cared about code optimization. Importing xmlchars meant importing all of the library and because of the way the code was generated there was no way to shake the resulting code tree.

Since version 1.3.0, importing xmlchars is deprecated. Instead, you should directly load the file from xmlchars/lib that you care about. Even without tree shaking being used, this results in a smaller footprint.

Different modules cover different standards. At the time this documentation was last updated, we had:

  • xmlchars/xml/1.0/ed5 which covers XML 1.0 edition 5.
  • xmlchars/xml/1.0/ed4 which covers XML 1.0 edition 4.
  • xmlchars/xmlns/1.0/ed3 which covers XML Namespaces 1.0 edition 3.

Features

The “things” each module contains can be categorized as follows:

  1. “Fragments”: these are parts and pieces of regular expressions that correspond to the productions defined in the standard that the module covers. You’d use these to build regular expressions.

  2. Regular expressions that correspond to the productions defined in the standard that the module covers.

  3. Lists: these are arrays of characters that correspond to the productions.

  4. Functions that test code points to verify whether they fit a production.

本站文章除注明转载外,均为本站原创或编译。欢迎任何形式的转载,但请务必注明出处。

转载请注明:文章转载自 JavaScript中文网 [https://www.javascriptcn.com]

本文地址:https://www.javascriptcn.com/read-65156.html

文章标题:xmlchars

回到顶部