Bootstrap - 键盘无法处理动态生成的文本框软搜索菜单

I'm trying to create a generic "soft-search" menu dropdown for my bootstrap text-boxes, so that when a user types something on the keyboard, the app should dynamically lookup the back-end rest api through ajax and populate the results in a dynamically generated bootstrap menu just below it:I'm trying to create a generic "soft-search" me