CODEWITHSUNDEEP
javascript
James J
James J

Reputation: 787

Text Highlighting. Replace text at position start and end

Are there any string replace methods that will replace anything between 2 positions, i.e. range.

When a user highlights a string of text in a textarea I'm able to get the start and end position. I now want to replace that text that's highlighted.

Upvotes: 0

Views: 2204

Answers (1)

David Hedlund
David Hedlund

Reputation: 129792

You can use substrings:

var newString = 
    originalString.substring(0, startIndex) +
    myReplacementString +
    originalString.substring(endIndex);

You could also use regex:

var rx = new RegExp('^([\\s\\S]{' + startIndex + '})[\\s\\S]{' + (endIndex - startIndex) + '}([\\s\\S]*)$');
var newString = originalString.replace(rx, '$1' + myReplacementString + '$2');

... but I would prefer substrings, in this scenario.

Upvotes: 2

Related Questions