如何在JavaScript中用正则表达式提取MsRtcOAuth href的属性值？

Doing the same regex extraction in JavaScript is straightforward—here's how you can replicate your Python logic:

First, define your target string just like you did in Python:

const STRING = 'Bearer trusted_issuers="", client_id="00000004-0000-0ff1-ce00-000000000000", MsRtcOAuth href="https://google.com",grant_type="urn:microsoft.rtc:windows,urn:microsoft.rtc:anonmeeting,password"';

Next, create your regex pattern. You can use a regex literal (enclosed in / characters) which mirrors your Python regex string:

const regexPattern = /MsRtcOAuth href="(.*?)"/;

Now, to run the search and get the captured group, you have two common, easy-to-use options:

Option 1: Use the exec() method #

This works almost exactly like Python's re.search()—it returns a match object (or null if no match is found):

const matchResult = regexPattern.exec(STRING);
if (matchResult) {
  const extractedUrl = matchResult[1]; // Access the first captured group (same as group(1) in Python)
  console.log(extractedUrl); // Outputs: https://google.com
}

Option 2: Use the match() method on the string #

You can also call match() directly on your string, which returns an array of matches (or null):

const matchResult = STRING.match(regexPattern);
if (matchResult) {
  const extractedUrl = matchResult[1];
  console.log(extractedUrl); // Outputs: https://google.com
}

A few quick, important notes:

• The (.*?) non-greedy match behaves exactly like it does in Python—it stops at the first closing quote instead of matching all the way to the end of the string.
• Always check if matchResult is not null before accessing matchResult[1] to avoid runtime errors if the pattern doesn't exist in the string.
• JavaScript uses 1-based indexing for captured groups, just like Python's group(1), so matchResult[1] gives you the content inside the first set of parentheses.

内容的提问来源于stack exchange，提问作者Amit Singh