Characters allowed after optional chaining

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

Created by: hackvertor

Created on: Saturday, May 4, 2024 at 9:26:25 PM

Updated on: Wednesday, May 28, 2025 at 5:08:18 PM

Category: XSS Execution

Vector visibility: Public

Vector type: JS

Vector charset: UTF-8

Template used:

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

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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)