buble-jsx-only/src/program/types/Literal.js

Bublé, but just JSX.

import Node from '../Node.js';
import CompileError from '../../utils/CompileError.js';

const nonAsciiLsOrPs = /[\u2028-\u2029]/g;

export default class Literal extends Node {
	initialise() {
		if (typeof this.value === 'string') {
			this.program.indentExclusionElements.push(this);
		}
	}

	transpile(code, transforms) {

		if (this.regex) {
			const { pattern, flags } = this.regex;
		} else if (typeof this.value === "string" && this.value.match(nonAsciiLsOrPs)) {
			code.overwrite(
				this.start,
				this.end,
				this.raw.replace(nonAsciiLsOrPs, m => m == '\u2028' ? '\\u2028' : '\\u2029'),
				{
					contentOnly: true
				}
			);
		}
	}
}