Replacing string value

Question

I've got a string with various hex values in random places.

Is it possible to replace all hex values to a single value #FF0000 ?

var info_str = 'The avocado, also known as butter pear or alligator pear, is a fruit that is widely "acknowledged to #E5E5E5 have properties" that reduce cholesterol levels... also #00FF00 ...';

I need to replace all hex values #xxxxxx with #FF0000. How can I do that?

replace() does not work because the hex values in the string are different.

Answer 1

You can use a simple regex like

var info_str = 'The avocado, also known as butter pear or alligator pear, is a fruit that is widely "acknowledged to #E5E5E5 had (property" that reduce cholesterol levels... also #00FF00 ...';

var str = info_str.replace(/#[\da-z]+/ig, '#FF0000');

snippet.log(str)

<!-- Provides the `snippet` object, see http://meta.stackexchange.com/a/242144/134069 -->
<script src="http://tjcrowder.github.io/simple-snippets-console/snippet.js"></script>

Answer 2

Use replace() with regex as /#[\da-f]{6}/ , also add flags ig for ignoring case and global match

var info_str = 'The avocado, also known as butter pear or alligator pear, is a fruit that is widely "acknowledged to #FFF001 have properties" that reduce cholesterol levels... also #00FF00 ...';
document.getElementById('myDiv').innerHTML = info_str.replace(/#[\da-f]{6}/ig, '#FF0000');

<div id="myDiv"></div>

Explanation :

#[\da-f]{6}

1. # matches the character #
2. \d for matching any digit
3. a-f for matching letters a,b,c,d,e or f, since hex value contains only these alphabets
4. {6} Exactly 6 times

Debuggex Demo

Regex demo