javascript - RegExp working in JSFiddle but not in nodejs -

i have regular expression:

/(?:!!)(.+)(?:!!)(?:\(zoomon )([\s,]+)(?:\))/g 

it matches !!some text!!(zoomon 1,2,3).

this works okay in browser (jsfiddle here) not in node. writing in es2015, using babel , es2015 preset.

for insight showdown extension. noticed twitter extension add \ regexps. quirk of node/es5 i'm not aware of?

update

i hoping wouldn't need post code node since thought node quirk.

anyway, code extension showdown:

# extensions.js export const manipulationapiextensions = () => [   {     // [zoomon node1,node2,node3,...](some text)     type: 'lang',     filter: (text, converter, options) => {       const toreturn = text.replace(/(?:!!)(.+)(?:!!)(?:\(zoomon )([\s,]+)(?:\))/g, (match, innertext, nodestring) => {         const nodes = nodestring.split(/\s*,\s*/);         let nodearrayasstring = '[';         nodes.foreach(node => {           nodearrayasstring += `'${node}',`;         });         nodearrayasstring += ']';         return `<a onclick="pathwayinstance.manipulator.zoomon(${nodearrayasstring})">${text}</a>`;       });       return toreturn;     },   }, ]; 

this used in showdown follows:

export const getshowdown = (kaavioinstance) => {   window.diagram = kaavioinstance;   showdown.extension('kaavio', manipulationapiextensions());   return new showdown.converter({     extensions: ['kaavio'],   }); }; 

and in unit test:

describe('custommarkdown', () => {   // don't need kaavio since checking output html   const mockkaavioinstance = {};   const converter = getshowdown(mockkaavioinstance);   console.log(converter.getallextensions())    describe('kaavio', () => {     it('should return correct html markdown', () => {       const markdown = normalize(fs.readfilesync(`${__dirname}/extensions/kaavio.md`, 'utf8'));       const html = normalize(fs.readfilesync(`${__dirname}/extensions/kaavio.html`, 'utf8'));        const output = converter.makehtml(markdown);        assert.equal(output, html);     });   }); }); 

the unit test fails since no match found.

if simple below works. of course unit test doesn't work if console.log out expected result of matched.

# extensions.js export const manipulationapiextensions = () => [   {     // [zoomon node1,node2,node3,...](some text)     type: 'lang',     filter: (text, converter, options) => {       const toreturn = text.replace(/./g, (match) => {         return 'matched';       });       return toreturn;     },   }, ]; 

that works me in node, tried it, fiddle uses alert(). need use console.log() node understands.

var text = '!!some text!!(zoomon node1)'; text.replace(/(?:!!)(.+)(?:!!)(?:\(zoomon )([\s,]+)(?:\))/g, function (match, innertext, nodestring) {     console.log("matched!"); }) 

maybe have other code didn't post interfering?