does any one knows why my laravel app.js disable some other js or jquery links

I am working on my collage project there is a problem with js links for example my bootstrap drop menu will not work if i link laravel app.js. but if i remove the app.js file which is from laravel asset then other links works perfectly. I have change places of links but didn't work if someone please help me Thanks this is image of my footer file which include all js links