/// import katexLib = require('katex'); class KatexTest { constructor() { katexLib.render('My Latex String', document.createElement('div')); try { let options: katexLib.KatexOptions = { breakOnUnsupportedCmds: true }; let value: string = katexLib.renderToString('My Latex String', options); } catch (error) { if (error instanceof katexLib.ParseError) { //do something with this error } } } }