Rule Definition
attachEvent is IE-only and not supported elsewhere.
Remediation
Use addEventListener with appropriate feature detection (if you must support very old browsers, add a small wrapper).
Violation Code Sample
var btn = document.getElementById("saveBtn");
btn.attachEvent("onclick", function () {
save();
});
Fixed Code Sample
var btn = document.getElementById("saveBtn");
btn.addEventListener("click", function () {
save();
});
Reference
https://learn.microsoft.com/en-us/previous-versions/windows/internet-explorer/ie-developer/platform-apis/aa703974(v=vs.85)
Related Technologies
Technical Criterion
CWE-710 - Improper Adherence to Coding Standards [Pillar]
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