Characters allowed before parentheses

This vector shows what characters are allowed before parentheses in a function call in JavaScript.

Created Mar 31, 2024

Updated May 6, 2025

Detecting browser...

CategoryXSS Execution

VisibilityPublic

TypeJS

CharsetUTF-8

Template used:

log$[chr]($[i])

Sample payloads

alert0x09(9)

alert
(10)

alert0x0B(11)

alert0x0C(12)

alert0x0D(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)