example
updateQueryStringParameter("https://www.baidu.com?a=123",'b','hello')
//result
https://www.baidu.com/?a=123&b=hello
function updateQueryStringParameter(uri, key, value) {
    if (!value) {
        return uri;
...			
		8-04 2,161 views
					
				example
updateQueryStringParameter("https://www.baidu.com?a=123",'b','hello')
//result
https://www.baidu.com/?a=123&b...