I know about the negative look behind (?<!) operator, but it appears that the Javascript engine used in Expo/React-Native does not support it. What I want is to implement the following
export function processEmbedded(text: string): string {
return text.replace(/(?<!!)\[Embedded\]/gm, "![Embedded]");
}
What I did was a bit hacky in that I stripped and re-added.
export function processEmbedded(text: string): string {
return text
.replace(/!\[Embedded\]/gm, "[Embedded]")
.replace(/\[Embedded\]/gm, "![Embedded]");
}
For my cases it does work, but I am pretty sure there's an edge case where it does not.
You may use this work-around solution using a capture group:
export function processEmbedded(text: string): string {
return text.replace(/(^|[^!])\[Embedded\]/gm, "$1![Embedded]");
}
(^|[^!]) matches start of line or a character that is not ! in first capture group. In the replacement we put it back using $1 back-reference.