How to Replace All Occurrences of a String Using JavaScript?

Replacing All Occurrences of a String in JavaScript

In JavaScript, the string.replace() method is used to replace occurrences of a substring. However, by default, it only replaces the first occurrence. To replace all occurrences, you need to use a regular expression with the g flag.

<code class="javascript">string = "Test abc test test abc test test test abc test test abc";
string = string.replace(/abc/g, ''); // replaces all occurrences of "abc" with ""</code>

Alternative (legacy browsers):

For older browsers that do not support the g flag, you can use the following function to replace all occurrences of a string:

<code class="javascript">function replaceAll(str, find, replace) {
  return str.replace(new RegExp(find, 'g'), replace);
}</code>

Handling Special Characters:

Note that special characters in the find string need to be escaped using the escapeRegExp() function to prevent them from being interpreted as part of the regular expression.

<code class="javascript">function escapeRegExp(str) {
  return str.replace(/[.*+?^${}()|[\]\]/g, '\$&amp;');
}

function replaceAll(str, find, replace) {
  return str.replace(new RegExp(escapeRegExp(find), 'g'), replace);
}</code>

By using the g flag and handling special characters properly, you can replace all occurrences of a string in JavaScript effectively.

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