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var isInIFrame = (window.location != window.parent.location);
if(isInIFrame==true){
    // iframe
}
else {
    // no iframe
}



This is true if a window is not a frame/iframe:
if(self!=top){
   console.log('window is a frame/iframe')
}

function inIframe () {
    try {
        return window.self !== window.top;
    } catch (e) {
        return true;
    }
}


function iniFrame() { 
    if ( window.location !== window.parent.location ) 
    { 
      
        // The page is in an iFrames 
        document.write("The page is in an iFrame"); 
    }  
    else { 
          
        // The page is not in an iFrame 
        document.write("The page is not in an iFrame"); 
    } 
}