A transform that replaces strings in a file using a regular expression. Just like string.replace but with streams. Desiged for use with browserify / parcelify.

stream = replaceStringTransform( file, options );

There are two required options:

• find - The string or regular expression to find.
• replace - The string to replace find with. May also be a function that returns a string. The signature of the function should be the same as the signature of the a function passed as the second argument to String.prototype.replace, except for with additional file argument.

Example:

before.txt is:

flip

We run it through the transform.

var t = require( 'replace-string-transform' );

fs.createReadStream( 'before.txt' )
	.pipe( t( file, {
		find : /f(\w{0,2})p/,
		replace : function( file, match, middle ) {
			return 'f' + (middle === 'li' ? 'lo' : 'li') + 'p';
		}
	} )
	.pipe( fs.createWriteStream( 'after.txt' ) );

Now after.txt is:

flop

License

MIT