joplin-notes/joplin notion extension/Web Development/Javascript/regular expressions.md

regular expressions

• dot character in regex dont include newline character so use this [\s\S] instead of .. eg: const questionreg = /\.gpt\s+([\s\S]*)/;
• variables in regex

    // variable == 'REGEX'
  
    // to escape special characters like +,.,etc in variable string
    function escapeRegExp(string) {
      return string.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
    }
  
    const variable = <VALUE>
  
    let re = new RegExp(String.raw`\s${variable}\s`, "g");
  

• word boundary to search by word /\bword\b/ instead of /word/