const regex = new RegExp('{/(^\\[|b)/g}', 'gi')
const str = `Digital imaging and semiconductor image sensor technology facilitated the development and rise of social media.[11] Advances in metal-oxide-semiconductor (MOS) semiconductor device fabrication, reaching smaller micron and then sub-micron levels during the 1980s–1990s, led to the development of the NMOS (n-type MOS) active-pixel sensor (APS) at Olympus in 1985,[12][13] and then the complementary MOS (CMOS) active-pixel sensor (CMOS sensor) at NASA's Jet Propulsion Laboratory (JPL) in 1993.[12][14] CMOS sensors enabled the mass proliferation of digital cameras and camera phones, which bolstered the rise of social media.[11]`;
const subst = `dkjd`;
// The substituted value will be contained in the result variable
const result = str.replace(regex, subst);
console.log('Substitution result: ', result);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions