const regex = /^\*+(?= +\S)|(?<! )(?<!\*(?=\S)[^*\n]*)(\*+)(?![\w*])/g;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('^\\*+(?= +\\S)|(?<! )(?<!\\*(?=\\S)[^*\\n]*)(\\*+)(?![\\w*])', 'g')
const str = `Input => Actual === Expected : Success
=========================================================================
A b*** c => A b³ c === A b³ c : true
A *b* c* => A *b* c¹ === A *b* c¹ : true
A *b* *c* d* => A *b* *c* d¹ === A *b* *c* d¹ : true
A *b* c* d** => A *b* c¹ d² === A *b* c¹ d² : true
** a b c => ² a b c === ² a b c : true
** a b*** c => ² a b³ c === ² a b³ c : true
A *bc* d** => A *bc* d** === A *bc* d² : false`;
// Reset `lastIndex` if this regex is defined globally
// regex.lastIndex = 0;
let m;
while ((m = regex.exec(str)) !== null) {
// This is necessary to avoid infinite loops with zero-width matches
if (m.index === regex.lastIndex) {
regex.lastIndex++;
}
// The result can be accessed through the `m`-variable.
m.forEach((match, groupIndex) => {
console.log(`Found match, group ${groupIndex}: ${match}`);
});
}
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