javascript - Typing notification in node.js using KeyUp -


i using node.js , making chat application.

assume user chatting user b. in chat applications whenever each user starts typing, notifier appears says " user x typing...".

i have "typing ..." functionality it. using method:

$(document).on('keyup','form.chat input:text', function(e){     var $id = $(this).attr('id'); // text id user id chating with.     if ( $(this).val().trim().length > 0 )         socket.emit("writingon", $id );     if ( $(this).val().trim().length === 0 )         socket.emit("writingoff", $id ); });

it working well. question is:
is method? because foreach keyup client sends req server

thanks in advance.

is method?

for sending every keystroke in live-edit application, yes. providing "is typing" feature, no.

you need send message when user starts typing, , message when hasn't typed predetermined period of time. use timeout reset on every following keystroke. in case, need collection of timeouts each field typing in.

var timeouts = {},     time = 2000; $(document).on('keyup','form.chat input:text', function(e){     var id = this.id/*,         isempty = /^\s*$/.test(this.value) */;     if (id in timeouts) // if scheduled         cleartimeout(timeouts[id]); // remove     else /* if (!isempty) */ // else first stroke         socket.emit("writingon", id);     // schedule sending off-message, canceled when     // keystroke happens     timeouts[id] = settimeout(function() {         socket.emit("writingoff", id);         delete timeouts[id];     }, /* isempty ? 0 : */ time); });

Comments

Post a Comment

Popular posts from this blog

java.util.scanner - How to read and add only numbers to array from a text file -

i'm learning java , have question regarding reading file want read numbers file contains strings well. here example of file: 66.56 "3 java 3-43 5-42 2.1 1 and here coding: public class test { public static void main (string [] args){ if (0 < args.length) { file x = new file(args[0]); try{ scanner in = new scanner( new fileinputstream(x)); arraylist<double> test = new arraylist<>(); while(in.hasnext()){ if(in.hasnextdouble()){ double f=in.nextdouble(); test.add(f);} else {in.next();} } catch(ioexception e) { system.err.println("exception during reading: " + e); } } my problem add 66.56,2.1 , 1 doesn't add 3 after "3 or ignores 3-43 , 5-42 can tell me how skip strings , add doubles here? thanks all said 3 ie; "3, 3-43 , 4-42 strings either u read string , split , check number @ " , - or put in space between characters , integers. jvm after compilation tre...
Read more

rewrite - Trouble with Wordpress multiple custom querystrings -

i'm working on adding multiple querystring , doesn't seem work. i've found codes seems work others might i'm missing something. i want like: http://mydomain.com/board/?getyear=2013&getsometext2=sometext to http://mydomain.com/board/2013/sometext/ i added code below functions.php file. doesn't seem work should though. this works. echoing querystring gets both variable without problem. http://mydomain.com/board/2013/sometext/ but doesn't. tested querystring vis isset() seems nothing being set/get http://mydomain.com/board/2013/ function add_query_vars($vars) { $vars[] = "getyear"; $vars[] = "getsometext2"; return $vars; } add_filter('query_vars', 'add_query_vars'); function add_rewrite_rules($arules) { $anewrules = array('board/([^/]+)/([^/]+)/?$' => 'index.php?pagename=board&getyear=$matches[1]&getsometext2=$matches[2]'); $arules = $a...
Read more