Getting all occurrences of a regex pattern in the string

Question

Was trying to refer to this (Return positions of a regex match() in Javascript?) to extract beginning and ending position of matches in a particular string but somehow it only returns 1 match. Not sure what I'm doing wrong.

var str = "abc <span djsodjs> ajsodjoasd <spandskds>";

var patt = /.*(<span.*>).*/igm;

while (match = patt.exec(str)) {
    console.log(match.index + ' ' + patt.lastIndex);
}

returns 0 41

expected:

0  41
4  17
30 40

You should avoid using regex to parse HTML content. – Tim Biegeleisen Sep 14 '18 at 06:10 — Tim Biegeleisen, Sep 14 '18 at 06:10

score 0 · Answer 1 · answered Sep 14 '18 at 06:17

if you want index for tag only then you should match only that tag in regex, so you will find the particular that tags values.

Try below code:

var str = "abc <span djsodjs> ajsodjoasd <spandskds>";

var patt = /(\<span)([^\<]*)(\>)/igm;

while (match = patt.exec(str)) {
    console.log(match.index + ' ' + patt.lastIndex);
}

This regex will return two values

/(\<span)([^\<]*)(\>)/igm

Getting all occurrences of a regex pattern in the string

1 Answers1