Question

I got a simple javascript code :

'test1 {0} test2 test3'.replace('{0}', "test$'")

I expected the result to be test1 test$' test2 test3. But the result is test1 test test2 test3 test2 test3

This is absolutely normal. According to the mozilla documentation : https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/String/replace

The $' sequence has a signification in this case.

But i want to replace {0} with test$' exactly. I don’t want the $' sequence to be replace by something else. I have tried many ways :

'test1 {0} test2 test3'.replace('{0}', "test\$\'")
'test1 {0} test2 test3'.replace('{0}', "test\\$\\'")
'test1 {0} test2 test3'.replace('{0}', "test\u0024\u0027")
'test1 {0} test2 test3'.replace('{0}', "test\$'")

But nothing works.

How can i escape the $' sequence to avoid Firefox using it ?

Answer 1

From the page you cited:

$$ Inserts a “$”.

So:

'test1 {0} test2 test3'.replace('{0}', "test$$'")

This works for me on JSFiddle.net.