Regex - cannot match inline token if it is surrounded by text.

[ivanjaros]

I have a rating inline token which is [1-5]*.
This is my extension:

const rating = {
  name: 'rating',
  level: 'inline',
  start(src) { return src.match(/^[1-5]\*/)?.index; },
  tokenizer(src) {
    const match = src.match(/^([1-5])\*/);
    if (match) {
      return {
        type: 'rating',
        raw: match[0],
        rating: parseInt(match[1]),
      };
    }
  }
};

This is the source markdown:

1*

2* suffix

_prefix_ 3*

prefix 4*

prefix 5* suffix

This is the result:

It seems to be unable to work if there is text before it. It works if the text is tokenized(like italic or bold) but not if it is plain text.
I tried to do additional inline parsing but I cannot prepend the text to my own token so this is not working at all.

[UziTech]

Your start regex has a ^ so it will only match if the text is at the beginning

[ivanjaros]

yes i know. but if i do not use ^ then i will get the content from before the token and i have no way of rendering it. i can render suffix but not prefix.

[ivanjaros]

ah, this worked:

const rating = {
  name: 'rating',
  level: 'inline',
  start(src) { return src.match(/[1-5]\*/)?.index; }, <-- no caret
  tokenizer(src) {
    const match = src.match(/^([1-5])\*/); <--- caret
    if (match) {
      return {
        type: 'rating',
        raw: match[0],
        rating: parseInt(match[1]),
      };
    }
  }
};