How to check my url is in iframe or not javascript

Browsers can block access to window.top due to same domain.

Example

<script>
inIframe();
function inIframe () {
    try {
        var isif = window.self !== window.top;
        if(isif == false){
            //not iframe
        }else{
  //in iframe
}
    } catch (e) {
            //not iframe
    }
}
</script>

top and self are both window objects (along with parent), so you're seeing if your window is the top window.