The following code is taken from the link:
http://tsamuel.wordpress.com/2007/05/17/direct-web-remoting-a-tutorial/
It is an autocomplete text field that uses DWR.
<script type="text/javascript">
new Autocompleter.DWR('personName', 'personListDiv', updatePersonList,{ valueSelector: function(obj){ return obj.name; },
partialChars: 2, choices: 10 }); </script>
The updatePersonList:
function updatePersonList(autocompleter, token) {
DWRPersonService.getAllPersons(function(data) { autocompleter.setChoices(data); });
}
What I would like to do is to configure the code above in a way that the search only starts when three characters are typed (at least). Tried to change partialChars value but it doesn't seem to work...
I don't know how partialChars works, i would do something like
function updatePersonList(autocompleter, token)
{
if(token.length < 3) return;
DWRPersonService.getAllPersons(function(data)
{
autocompleter.setChoices(data);
});
}
Related
I'm now using casperjs for web crawling. Almost everything is good, but I faced some trouble. First, my code is like below.
casper.start().each(SOME_URLS, function(self, URL) {
self.thenOpen(URL, function() {
self.then(function() {
var getDatas = function() {
var title = $('SOME_SELECTOR').map(function() {
return $(this).text();
}).get();
return {
title: title
};
}
data = self.evaluate(getDatas);
console.log(JSON.stringify(data));
});
});
}).run();
I want to get some data from webpage to 'data' variable. Sometimes data is perfectly good(on console.log), but sometimes, data is empty!
Why this happening? What did I wrong?
The problem is you cant call casper.start more than once. Your loop needs to inside the casper.start function or inside a casper.then
See this excellent SO answer to help you do this.
Basically only call casper.start once and place your loop inside a casper.then
I'm trying to get the hang of using ajax loads (mostly via jquery) to make my site more efficient. Wondering if anyone can provide any suggestions re "best practices" for using ajax?
Is there a way to simplify a script for multiple ajax calls? For example, I currently have the working script:
$(document).ready(function() {
$('#dog').click(function () {
$('#body').load("dog.html");
});
$('#cat').click(function () {
$('#body').load("cat.html");
});
$('#bird').click(function () {
$('#body').load("bird.html");
});
$('#lizard').click(function () {
$('#body').load("lizard.html");
});
});
The script just gets longer and longer with each additional function. Is there a simpler, more efficient way to write this script to cover multiple load scripts?
Also, should I be using ajax loads to replace the majority of actual links?
Here is a suggestion, since the code you posted seems to have a pattern between the id and the filename:
$(document).ready(function () {
$(document).on('click', 'commonParentElementHere', function (e) {
$('#body').load(e.target.id + ".html");
});
});
This suggestion uses .on() and you just need to add a commonParentElementHere, a id or a class of the common parent of those elements.
Another option is to use a class on all elements that should be clickable, and then use the code passing the id to the html file name, like:
$(document).ready(function () {
$(document).on('click', '.theCOmmonClass', function () {
$('#body').load(this.id + ".html");
});
});
I'd say give all the elements you want to click on a class say ajax then.
$(document).ready(function() {
$('.ajax').click(function () {
$('#body').load(this.id + ".html");
});
});
Assuming that the id matches the file name the script can be simplified to:
$(document).ready(function() {
$('#dog,#cat,#bird,#lizard').click(function () {
var fileName = this.id + ".html";
$('#body').load(fileName);
});
});
This script simply specifies each id in a single selector that separates each id with a comma. This will calls the click function to be fired for each element. With the anonymous function attached to the click event, the id of each element is obtained and concatenated to create the file name which is then passed to the load function.
If the id doesn't always match the element you could use the following approach.
var mappings = [
{id: "fileName1", file:"file.html"},
{id: "fileName2", file:"file2.html"}
];
$(document).ready(function() {
for(var i = 0; i < mappings; i++){
createMapping(mappings[i]);
}
function createMapping(mapping){
$("#" + mapping.id).click(function(){
$('#body').load(mapping.file);
});
}
});
$('.collapse').each(function() {
var title= $(this).siblings('.accordion-heading').find('a');
$(this).on('show hide', function (e) {
if(!$(this).is(e.target))return;
title.parent().toggleClass('active', 300);
title.parent().hasClass('active') ? $('input.party').prop('value', '') : $('input.party').val(title.siblings('.delete').prop('id'));
var id = title.siblings('.delete').prop('id');
var data = {id: id};
$.post("times.php", data, function(result) {
if(title.parent().hasClass('active')){
$('.times').html('');
} else {
$('.times').html($.parseJSON(result));
}
})
})
})
So I am adding a new accordion-group to my html by adding a new party and I wan't all this to work on the newly added elements as well. I didn't find topics that could help me since it is a bit more specific than any random each function (I think).
This future elements thing is new to me, so I would appreciate some explanations or a good link to a place other that the jquery website which I already checked.
Thank you for your time!
Basically what I want to do this replace $(this).on('show hide', function (e) { with something like $(document).on('show hide', $(this), function (e) {. What I just wrote doesn't work though.
If it is just about the event handler, then you can use event delegation to capture the event on dynamically created elements as well.
There is not reason why you have to use .each here, so just omit it:
$(document.body).on('show hide', '.collapse', function() {
var title = $(this).siblings('.accordion-heading').find('a');
if(!$(this).is(e.target))return;
// rest of the code...
});
this will apply on any new objects matching selector
jQuery(document).on('show hide', '.accordion-heading a', function(event){
...
});
The Story So far....
Trying to learn JS and JQuery and i thought i would start with the basics and try alittle AJAX "search as you type" magic. Firstly i just wanted to get the AJAX part right and iterating through the return JSON object and appending it to a unordered list. Im doing no validation on the inputted value vs. the returned JSON results at this time, i just want a controlled way of when to do the AJAX getJSON call. Later i will do the validation once i get this right.
Anyways im having trouble displaying the Account Numbers in in the ul. At the moment the only thing that is being displayed is AccountNumber in the li and not my ACCOUNT NUMBERS
My JS Code is here:
http://jsfiddle.net/garfbradaz/HBYvq/54/
but for ease its here as well:
$(document).ready(function() {
$("#livesearchinput").keydown(function(key) {
$.ajaxSetup({
cache: false
});
$.getJSON(" /gh/get/response.json//garfbradaz/MvcLiveSearch/tree/master/JSFiddleAjaxReponses/", function(JSONData) {
$('<ul>').attr({
id: "live-list"
}).appendTo('div#livesearchesults');
$.each(JSONData, function(i, item) {
var li = $('<li>').append(i).appendTo('ul#live-list');
//debugger;
});
});
});
});
My JSON file is hosted on github, but again for ease, here it is:
https://github.com/garfbradaz/MvcLiveSearch/blob/master/JSFiddleAjaxReponses/demo.response.json
{
"AccountNumber": [
1000014,
1015454,
1000013,
1000012,
12
]
}
Also here is my Fiddler results proving my JSON object is being returned.
EDIT:
There were so queries about what i was trying to achieve, so here it goes:
Learn JQuery
To build a "Search as you Type" input box. Firstly i wanted to get the AJAX part right first, then i was going to build an MVC3 (ASP.NET) Application that utilises this functionality, plus tidy up the JQuery code which includes validation for the input vs. the returned JSON.
Cheesos answer below worked for me and the JSFiddle can be found here:
http://jsfiddle.net/garfbradaz/JYdTU/
First, I think keydown is probably the wrong time to do the json call, or at least... it's wrong to do a json call with every keydown. That's too many calls. If I type "hello" in the input box, within about .8 seconds, then there are 5 json requests and responses.
But you could make it so that it retrieves the json only the first time through, using a flag.
Something like this:
$(document).ready(function() {
var $input = $("#livesearchinput"), filled = false;
$.ajaxSetup({ cache: false });
$input.keydown(function(key) {
if (!filled) {
filled = true;
$.getJSON("json101.js", function(JSONData) {
var $ul =
$('<ul>')
.attr({id: "live-list"})
.appendTo('div#livesearchesults');
$.each(JSONData, function(i, item) {
$.each(item, function(j, val) {
$('<li>').append(val).appendTo($ul);
});
});
});
}
});
});
The key thing there is I've used an inner $.each().
The outer $.each() is probably unnecessary. The JSON you receive has exactly one element in the object - "AccountNumber", which is an array. So you don't need to iterate over all the items in the object.
That might look like this:
$.each(JSONData.AccountNumber, function(i, item) {
$('<li>').append(item).appendTo($ul);
});
What you probably want is this:
$.each(JSONData.AccountNumber, function(i, item) {
var li = $('<li>').append(item).appendTo('ul#live-list');
});
Your code:
$.each(JSONData, function(i, item) {
var li = $('<li>').append(i).appendTo('ul#live-list');
});
Says "iterate over the keys and values of the outer JSON structure, and print the keys". The first key is "AccountNumber", so you end up printing that.
What you want to do is iterate over the array stored at JSONData.AccountNumber, and print the values:
$.each(JSONData.AccountNumber, function() {
var li = $('<li>').append(this).appendTo('ul#live-list');
});
I've successfully implemented a bit of code that strips all HTML from a pasted string using stripTags(). My next goal is to mark a few tags with white flags so they get ignored on 'paste' event using .wrap() to augment the function.
I'm using prototype.js as a framework and have slowly been working through the growing pains of learning both the framework and javascript, but this issue has presented a bit of a roadblock.
I've googled around a bit and found what looks like two great solutions, but I don't seem to be implementing them correctly.
Found solutions:
http://perfectionkills.com/wrap-it-up/ (function to indicate tags to remove)
and
http://pastebin.com/xbymCFi9 (function to allow tags to keep)
I pretty much copied and pasted from the latter.
If I pull the 'br' from the code, then the regex is ignored and all html is stripped. If I leave it, nothing gets pasted.
Here is what I've pieced together (and I feel silly for not being able to figure this out!).
String.prototype.stripTags = String.prototype.stripTags.wrap(
function(proceed, allowTags) {
if (allowTags) {
if (Object.isString(allowTags)) allowTags = $w(allowTags)
this.gsub(/(<\/?\s*)([^\s>]+)(\s[^>]*)?>/, function(match) {
if (allowTags.include(match[2].toLowerCase()))
return match[1] + match[2] + match[3] + '>'
})
} else {
// proceed using the original function
return proceed();
}
});
WysiHat.Commands.promptLinkSelection = function() {
if (this.linkSelected()) {
if (confirm("Remove link?"))
this.unlinkSelection();
} else {
var value = prompt("Enter a URL", "http://www.alltrips.com/");
if (value)
this.linkSelection(value);
}
}
document.on("dom:loaded", function() {
var editor = WysiHat.Editor.attach('event_desc');
var toolbar = new WysiHat.Toolbar(editor);
editor.observe("paste", function(event) {
var el = $(this);
setTimeout(function() {
var pText = el.innerHTML.stripTags('br');
//alert(pText);
$('event_desc_editor').update(pText);
$('event_desc').setValue(pText);
}, 0);
});
(You may recognize the WysiHat code from 37Signals text editor)
note: you can see the alert commented out. If I do alert the ptext, I get 'undefined' returned.
So I've given up on and moved to a regex solution:
el.innerHTML.replace(/<(?!\s*\/?\s*p\b)[^>]*>/gi,'')