find bitcoin addresses in a string using regex in javascript

To find bitcoin addresses in a string using regex in JavaScript, you can use the following regular expression pattern:

index.tsx
/([13][a-km-zA-HJ-NP-Z1-9]{25,34})/g
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This pattern matches any string of characters that starts with either "1" or "3", followed by 25-34 letters and numbers (excluding "0", "O", "I", and "l"), which is the pattern for a typical bitcoin address.

Here's an example of how you can use this regex to find bitcoin addresses in a string:

index.tsx
const str = "Lorem ipsum dolor sit 1BvBMSEYstWetqTFn5Au4m4GFg7xJaNVN2 amet, consectetur 3J98t1WpEZ73CNmQviecrnyiWrnqRh"; // example string
const regex = /([13][a-km-zA-HJ-NP-Z1-9]{25,34})/g; // regex pattern
const matches = str.match(regex); // array of matches

console.log(matches); // ['1BvBMSEYstWetqTFn5Au4m4GFg7xJaNVN2', '3J98t1WpEZ73CNmQviecrnyiWrnqRh']
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In this example, the match() function returns an array of all the matched strings in the given string. The output will contain all bitcoin addresses present in the string.