I am trying to replace the following string
\section{Welcome to $\mathbb{R}^n$}
Some content
with
<h1>Welcome to $\mathbb{R}^n$</h1>
Some content
Obviously, the problem is that I have opening { and } between the curly brackets themselves. I have tried to use something like
strOutput = strOutput.replace(/\\section\*\s*\{([^}]*)\}/g, "<h1>$1</h1>");
in JavaScript, but with no luck. How do I go on approaching this?
Here is an example:
let str = String.raw`\section{Welcome to $\mathbb{R}^n$}`
let result = `<h1>${str.match(/(?<={).*(?=})/)}</h1>`
console.log(result)How about this:
let str = String.raw`\section{Welcome to $\mathbb{R}^n$}`
let m = str.replace(/\\section\s*\{(.*)}$/g, "$1")
let result = `<h1>${m}</h1>`
console.log(result)The problem with your expression was \*, which means a literal asterisks, but otherwise you nearly had it!
For the OP's use case of nested and un-nested curly braces one needs a regex which explicitly targets and captures the content in between two braces (opening/closing) which also contains a pair of opening/closing braces ... /\{(?<nested>[^{}]+\{[^{}]+\}[^{}]+)\}/g ...
const sample = String.raw`\section{Welcome to $\mathbb{R}^n$} \textbf{Other text} \textbf{Other text} \textbf{Other text} \textbf{Other text} \section{Welcome to $\mathbb{R}^n$} \textbf{Other text}\section{Welcome to $\mathbb{R}^n$} \textbf{Other text} \textbf{Other text} \textbf{Other text} \textbf{Other text} \section{Welcome to $\mathbb{R}^n$} \textbf{Other text}`;
// see ... [https://regex101.com/r/z4hZUt/1/]
const regXNested = /\{(?<nested>[^{}]+\{[^{}]+\}[^{}]+)\}/g;
console.log(
sample
.replace(regXNested, (match, nested) => `<h1>${ nested }</h1>`)
)