regex.exec not able to extract table from email body - regex

Question

I have email body where there is a table which has "Client Time" as the heading of first left Column.
I want to extract this whole table but am getting Null with following exec.
let regex = /<tr><td><b>Client Time([\S\s]+)<table/;
Logger.log(regex.exec(tempbody));
Here is the extra code but that should be fine.
if ((table = regex.exec(tempbody)) !== null) {
row_regex = new RegExp(/<tr>(.+)<\/tr>/g);
let data, tempdata, rows, cell;
Logger.log(data);
while ((rows = row_regex.exec(table[1])) !== null) {
data = []
cell_regex = new RegExp(/<td.*?>(.+?)<\/td>/g);
while ((cell = cell_regex.exec(rows[1])) !== null) {
data.push(cell[1]);
}
if (!tempdata || (tempdata && tempdata.length === data.length)) {
sheet.appendRow(data);
}
tempdata = data;
}
inProcessLabel.removeFromThread(threads[i]);
}
What change do I need to do in regex, sorry I don't understand regular expressions much but believe that this same code worked for me in past.

Answer 1

Using regular expressions to parse HTML is not a good idea (for a number of reasons).
We have V8 now so you can simply add a proper HTML/XML parser library (written in pure Javascript with minimal dependencies) to your Apps Script project. Just get the library source in full or minified form and add it as its own script file.
Here are a few good options:
XPath (source: full | minified)
HTMLParser2-20KB (source: minified)