Javascript inside question [duplicate]

Question

what happen if a post the following question in stackoverflow?

<script>
alert("javascript");
</script>

In other words, does stackoverflow sanitize the question text?

Answer 1

The question text is sanitized. Only a (very) small subset of HTML is tolerated.

<script> tags are not included in the whitelist. Only a very specific set of attributes are allowed, and only on <img> and <a> tags. Use attributes anywhere else and the tag is stripped completely.