Find hashtag of any language and replace with link in string

Question

Find #hashtag from string in node js for e.g:

my String is: string = "I Love #भारत #ভারত #ભારત #ਭਾਰਤ #ଭାରତ #இந்தியா #ഇന്ത്യ #ಭಾರತ #భారత #india and the whole country."

Output: hashtag = ["भारत", "ভারত", "ભારત", "ਭਾਰਤ", "ଭାରତ", "இந்தியா", "ഇന്ത്യ", "ಭಾರತ", "భారత", "india"]

also i need to replace string in node js for e.g.

Input String = "I Love #भारत #ভারত #ભારત #ਭਾਰਤ #ଭାରତ #இந்தியா #ഇന്ത്യ #ಭಾರತ #భారత #india and the whole country.";

Output String = "I Love <a href='http://hostname/hashtag/भारत' target='_blank'>#भारत</a> <a href='http://hostname/hashtag/ভারত' target='_blank'>#ভারত</a> <a href='http://hostname/hashtag/ભારત' target='_blank'>#ભારત</a> <a href='http://hostname/hashtag/ਭਾਰਤ' target='_blank'>#ਭਾਰਤ</a> <a href='http://hostname/hashtag/ଭାରତ' target='_blank'>#ଭାରତ</a> <a href='http://hostname/hashtag/இந்தியா' target='_blank'>#இந்தியா</a> <a href='http://hostname/hashtag/ഇന്ത്യ' target='_blank'>#ഇന്ത്യ</a> <a href='http://hostname/hashtag/ಭಾರತ' target='_blank'>#ಭಾರತ</a> <a href='http://hostname/hashtag/భారత' target='_blank'>#భారత</a> <a href='http://hostname/hashtag/india' target='_blank'>#india</a> and the whole country.";

Answer 1

Here is your string:

const str= "I Love #भारत #ভারত #ભારત #ਭਾਰਤ #ଭାରତ #இந்தியா #ഇന്ത്യ #ಭಾರತ #భారత #india and the whole country.";

To Match hashtags from string.

you can use match method of string. Here is the reference.

str.match(/(#\S*)/g);

Your code becomes:

const str = "I Love #भारत #ভারত #ભારત #ਭਾਰਤ #ଭାରତ #இந்தியா #ഇന്ത്യ #ಭಾರತ #భారత #india and the whole country.";

const result = str.match(/(#\S*)/g).map(hash=>hash.substr(1));

console.log(result);

To replace hashtags with links.

For the hashtag replacement, you can use the same regex with replace method of the string.

Here is your code:

const str = "I Love #भारत #ভারত #ભારત #ਭਾਰਤ #ଭାରତ #இந்தியா #ഇന്ത്യ #ಭಾರತ #భారత #india and the whole country.";


const result = str.replace(/(#\S*)/g, (hashtag) => {
  const hash=hashtag.substr(1);
  return `<a href='http://hostname/hashtag/${hash}' target='_blank'>${hash}</a>`
});

console.log(result);