Characters allowed after optional chaining

JavaScript allows you to conditionally call a function using optional chaining.

Created May 4, 2024

Updated May 28, 2025

Detecting browser...

CategoryXSS Execution

VisibilityPublic

TypeJS

CharsetUTF-8

Template used:

log?.$[chr]($[i])

Sample payloads

alert?.0x09(9)

alert?.
(10)

alert?.0x0B(11)

alert?.0x0C(12)

alert?.0x0D(13)

alert?. (32)

alert?. (160)

alert?. (5760)

alert?. (8192)

alert?. (8193)

alert?. (8194)

alert?. (8195)

alert?. (8196)

alert?. (8197)

alert?. (8198)

alert?. (8199)

alert?. (8200)

alert?. (8201)

alert?. (8202)

alert?. (8232)