const regex = /index:\s*([0-9]+)\s*,/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('index:\\s*([0-9]+)\\s*,', 'gm')
const str = `node v10.15.2 linux/amd64
[ 'b', index: 4, input: '++a+b+c++', groups: undefined ] 'hello'
[ 'c', index: 6, input: '++a+b+c++', groups: undefined ] 'hello'
Separating top and bottom so it's easier to read
[ 'a', index: 2, input: '++a+b+c++', groups: undefined ]
[ 'b', index: 4, input: '++a+b+c++', groups: undefined ]
[ 'c', index: 6, input: '++a+b+c++', groups: undefined ]`;
// 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