mathjax重置编号

hbghlyj

1. MathJax.InputJax.TeX.Definitions.Add({
2.         macros: {
3.           setCounter: "setCounter"
4.         }
5.       }, null, true);
6.       MathJax.InputJax.TeX.Parse.Augment({
7.         setCounter: function(name) {
8.           var num =  parseInt(this.GetArgument(name));
9.           MathJax.Extension["TeX/AMSmath"].number = num;
10.         }
11.       });

复制代码

codepen.io/pkra/pen/YXPQxR
不知在mathjax3里怎样写?

hbghlyj

在官方文档里找到了:
docs.mathjax.org/en/latest/input/tex/extensions/tagformat.html#tex-tagformat

1. MathJax = {
2.   startup: {
3.     ready() {
4.       const Configuration = MathJax._.input.tex.Configuration.Configuration;
5.       const CommandMap = MathJax._.input.tex.SymbolMap.CommandMap;
6.       new CommandMap('sections', {
7.         nextSection: 'NextSection',
8.         setSection: 'SetSection',
9.       }, {
10.         NextSection(parser, name) {
11.           MathJax.config.section++;
12.           parser.tags.counter = parser.tags.allCounter = 0;
13.         },
14.         SetSection(parser, name) {
15.           const n = parser.GetArgument(name);
16.           MathJax.config.section = parseInt(n);
17.         }
18.       });
19.       Configuration.create(
20.         'sections', {handler: {macro: ['sections']}}
21.       );
22.       MathJax.startup.defaultReady();
23.     }
24.   }
25. };

复制代码

这样便创建了两个指令nextSection和setSection

hbghlyj

You can reset equation numbering using the command.

MathJax.texReset([start])

where start is the number at which to start equation numbering.

测试:\begin{equation}1+1=2\end{equation}\begin{equation}2+2=4\end{equation}\begin{equation}3+3=6\end{equation}

hbghlyj

3#的MathJax.texReset确实起作用了,但是,它是在MathJax运行之前起作用,于是所有公式的编号都被重置了,如何在文章中间重置编号呢?就像\setcounter{equation}{0}这样?应该需要给MathJax增加定义,这里和这里都已经实现了setcounter,但是它们都是MathJax v2,问题是MathJax v3怎么实现setcounter

hbghlyj

docs.mathjax.org/en/latest/input/tex/extensions/tagformat.html#tex-tagformat
找到了

1. MathJax = {
2.   startup: {
3.     ready() {
4.       const Configuration = MathJax._.input.tex.Configuration.Configuration;
5.       const CommandMap = MathJax._.input.tex.SymbolMap.CommandMap;
6.       new CommandMap('sections', {
7.         nextSection: 'NextSection',
8.         setSection: 'SetSection',
9.       }, {
10.         NextSection(parser, name) {
11.           MathJax.config.section++;
12.           parser.tags.counter = parser.tags.allCounter = 0;
13.         },
14.         SetSection(parser, name) {
15.           const n = parser.GetArgument(name);
16.           MathJax.config.section = parseInt(n);
17.         }
18.       });
19.       Configuration.create(
20.         'sections', {handler: {macro: ['sections']}}
21.       );
22.       MathJax.startup.defaultReady();
23.     }
24.   }
25. };

复制代码

hbghlyj

math.stackexchange.com好像自动把每个回答的div的开头加上\begingroup,结尾加上\endgroup,这样就能每个回答分开编号.

hbghlyj

docs.mathjax.org/en/v2.7-latest/tex.html

The begingroup extension implements commands that provide a mechanism for localizing macro defintions so that they are not permanent. This is useful if you have a blog site, for example, and want to isolate changes that your readers make in their comments so that they don’t affect later comments.

@kuing
可以考虑给帖子的各个楼层加一个\begingroup⋯ ⋯\endgroup的wrapper,就像math.stackexchange.com那样?

For example, if you put \(\begingroup\) at the top of each reader’s comments and \(\endgroup\) at the end, then any macros they define within their response will be removed after it is processed.