使用正则表达式。

var body =< p> test< / p>
var result = body.replace（regex，）;

alert（result）;

这里是 DEMO

希望这有助于您。

I had made one div tag and stored its contents in a variable. If this tag contains p,b or any other tags then it should be removed from string. How can I achieve this?

use the regular expression.

var regex = /(<([^>]+)>)/ig
var body = "<p>test</p>"
var result = body.replace(regex, "");

alert(result);

HERE IS THE DEMO

Hope this helps.