const regex = /\[(.*?)\]/g;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('\\[(.*?)\\]', 'g')
const str = `[<span class="link" nr="28202" onclick="javascript:openAnlaggning('/kund/Bridge/Main.nsf/AnlOkatSamtligaFaltCopy/045C9DDFDC7AB308C1257C1B002E11F1?OpenDocument&urval=1');" >Alingsås Järnvägsstation</span>]fooo]`;
const subst = ``;
// 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