Being new to JavaScript I have not been able to come up with a solution to this issue.
I want each "Add to Cart" button to invoke the same function "AddtoCart". I have achieved this but at the cost of inline JavaScript - something I would like to avoid.
onclick=
"AddToCart(document.getElementById('toy_title1').innerHTML,document.getElementById('toy_quantity1').value,document.getElementById('toy_price1').innerHTML)
So how would I achieve including this as part of the external JavaScript file, bearing in mind I have to be able to apply this to all 4 unique items
You could change your function that way:
function AddToCart(toyId) {
var title = document.getElementById('toy_title'+toyId).innerHTML;
var quantity = document.getElementById('toy_quantity'+toyId).value;
var price = document.getElementById('toy_price')+toyId).innerHTML
}
Then on each button you just pass the toy's ID
Just be carefull about sensitive data like price, leaving it on Javascript(I'm supposing you will send it to your back-end after this) is dangerous, it could be easily manipulated.
But if your intention is just a test or something like that, its ok.
EDIT:
to call your this function you would do something like that:
onclick="AddToCart(1)"
Where 1 is your toy's ID, you should change it to 2,3... depending on your toy.
then you should read more about addEventListener(standard) and attachEvent(IE)
//assume element means the button
//you can use getElementsByTagName, getElementsByClassName, querySelectorAll etc.
//to fetch your elements
//DRY, store the operation in a function so it's reusabe and not written twice
function thisFunction(){
AddToCart(document.getElementById('toy_title1').innerHTML,
document.getElementById('toy_quantity1').value,
document.getElementById('toy_price1').innerHTML)
}
if(element.addEventListener){ //check if the standard is supported
element.addEventListener('click',function(){ //use it to add the handler
thisFunction();
});
} else {
element.attachEvent('onclick',function(){ //else, we use IE's version
thisFunction();
}, false);
}
Related
Here is a drop down list in SmartClient: http://www.smartclient.com/#dropdownGrid.
I want to make a selection using JavaScript. Like, I run some JavaScript in console, and the drop list will select a specific item.
I did some research, found a code snap to do this (the code is in Java, but I think there should be similar functions in JavaScript):
Record rec = perdomainGrid.getRecordList().find("domaine_id", domaine_id);
perdomainGrid.selectSingleRecord(rec);
If I want to make selection, first I need to obtain perdomainGrid object. In my above giving link, the drop down list id in GWT is exampleForm (can be seen in dropDownGrid.js tab). I try to get the object by:
var form = isc.DynamicForm.getById("exampleForm");
form does exist, but there is no getRecordList() function on it, there is selectSingleRecord() function on it though.
I try to check form's class by form.className, its value is normal. I don't know what does that mean.
I'm kind of confused now. Could somebody help me on this?
isc_SelectItem_5 has a function called pickValue(), it takes one parameter SKU. This function can be used to select item.
var itemName = "Letter Tray Front Load Tenex 200 Class Blk #23001";
var data = isc_SelectItem_5.optionDataSource.cacheData;
var targetSKU = data.find(function(e) {
if (e.itemName == itemName) {
return e;
}
}).SKU;
isc_SelectItem_5.pickValue(targetSKU);
I'm trying to write a plugin-like function in jQuery to add elements to a container with AJAX.
It looks like this:
$.fn.cacheload = function(index) {
var $this = $(this);
$.get("cache.php", {{ id: index }).done(function(data) {
// cache.php returns <div class='entry'>Content</div> ...
$(data).insertAfter($this.last());
});
}
and I would like to use it like this:
var entries = $("div.entry"),
id = 28;
entries.cacheload(id);
Think that this would load another "entry"-container and add it to the DOM.
This is works so far. But of course the variable that holds the cached jQuery object (entries) isn't updated. So if there were two divs in the beginning and you would add another with this function it would show in the DOM, but entries would still reference the original two divs only.
I know you can't use the return value of get because the AJAX-call is asynchronous. But is there any way to update the cached object so it contains the elements loaded via AJAX as well?
I know I could do it like this and re-query after inserting:
$.get("cache.php", {{ id: num }).done(function(data) {
$(data).insertAfter($this.last());
entries = $("div.entry");
});
but for this I would have to reference the variable holding the cached objects directly.
Is there any way around this so the function is self-contained?
I tried re-assigning $(this), but got an error. .add() doesn't update the cached object, it creates a new (temporary) object.
Thanks a lot!
// UPDATE:
John S gave a really good answer below. However, I ended up realizing that for me something else would actually work better.
Now the plugin function inserts a blank element (synchronously) and when the AJAX call is complete the attributes of that element are updated. That also ensures that elements are loaded in the correct order. For anyone stumbling over this, here is a JSFiddle: http://jsfiddle.net/JZsLt/2/
As you said yourself, the ajax call is asynchronous. Therefore, your plugin is asynchronous as as well. There's no way for your plugin to add the new elements to the jQuery object until the ajax call returns. Plus, as you discovered, you can't really add to the original jQuery object, you can only create a new jQuery object.
What you can do is have the plugin take a callback function as a second parameter. The callback could be passed a jQuery object that contains the original elements plus the newly inserted ones.
$.fn.cacheload = function(index, callback) {
var $this = this;
$.get('cache.php', { id: index }).done(function(html) {
var $elements = $(html);
$this.last().after($elements);
if (callback) {
callback.call($this, $this.add($elements));
}
});
return $this;
};
Then you could call:
entries.cacheload(id, function($newEntries) { doSomething($newEntries); } );
Of course, you could do this:
entries.cacheload(id, function($newEntries) { entries = $newEntries; } );
But entries will not be changed until the ajax call returns, so I don't see much value in it.
BTW: this inside a plugin refers to a jQuery object, so there's no need to call $(this).
I am new to jQuery. I have created a form where I hide some fields. I have created a function on the click of a button field. Here in this function definition I unhide the hidden fields one being my text field and another a button. I code that I use is:
finishOrder: function() {
document.getElementById("create-pwd").style.display = "block"
document.getElementById("finish-ok").style.display = "block" // this is my another button
// do further processing
},
Now on the click of another button (please see the comment "this is my another button") I call another function like this:
FinishcheckPassword: function() {
var pas = document.getElementById("pos-password")
var user = new db.web.Model("res.users").get_func("read")(this.session.uid, ['password']).pipe(function(result) {
if(pas.value == result.password){
return true
});
},
After the if condition returns true value, I want to the control to be transferred to the first function where I can do further processing. Is it possible, if yes how can this be achieved? Any help will be appreciated.
Sure, something like this:
$('#finish-ok').click(function(){
if(FinishcheckPassword()){
finishOrder();
}
}
Of course, this is probably not exactly the right code for you. The fact that you are assigning all your functions with : rather than = suggests that they are inside of some larger object. Therefore, they'd have to be called like myObject.finishOrder(). But the general approach of what I wrote above will work.
As a couple side notes, you have tagged the question with jQuery and refer to it in your post, but there isn't actually a single line of jQuery in your code.
Very confused here.
I have a search box which reads a list of school names from my database. When I select a school, the id (from the db) gets put in a hidden textbox.
I also have a search box which reads a list of courses from my database. However, I made the query so that it only reads the courses from the selected school.
It does that, in theory.
I was planning to pass the school id, which I grab from the hidden box, to the search script which in turn passes it to my database query. However, the variable I put my school id in doesn't seem to be updating.. yet it does. Let me explain.
I come on the page. The school for my test account has id 1. The id number in my hidden box is indeed 1. I search for a school which I know has some courses assigned to it: the id number in the box changes to 3.
I have a JS variable called school_id which I declared outside of my $(document).ready. I assume that means it's global (that's what I got taught even though SO told me once it isn't really the correct way to do this. Still have to look into that). I wrote a function which updates this variable when the school search box loses focus:
$("#school").blur(function() {
school_id = $("#school_id").val();
});
A quick javascript:alert(school_id); in my browser bar also shows the updated variable: it is now 3 instead of 1.
Onto the search script part of my page (excerpt of the script):
script:"/profiel/search_richting?json=true&limit=6&id=" + school_id + "&"
As you can see, I pass the school_id variable to the script here. However, what seems to be happening is that it always passes '1', the default variable when the page loads. It simply ignores the updated variable. Does this string get parsed when the page loads? In other words, as soon as the page loads, does it actually say &id=1? That's the only idea I can come up with why it would always pass '1'.
Is there a way to make this variable update in my script string? Or what would be the best way to solve this? I'm probably missing out on something very simple here again, as usual. Thanks a lot.
EDIT
Updated per request. I added a function getTheString as was suggest and I use the value of this function to get the URL. Still doesn't work though, it still seems to be concatenating before I get a chance to update the var. HOWEVER, with this code, my ajax log says id:[object HTMLInputElement], instead of id:1. Not sure what that means.
<script type="text/javascript">
var school_id;
$(document).ready(function() {
$("#school").blur(function() {
school_id = $("#school_id").val();
});
// zoekfunctie
var scholen = {
script:"/profiel/search_school?json=true&limit=6&",
varname:"input",
json:true,
shownoresults:false,
maxresults:6,
callback: function (obj) { document.getElementById('school_id').value = obj.id; }
};
var as_json = new bsn.AutoSuggest('school', scholen);
var richtingen = {
script: getTheString(),
varname:"input",
json:true,
shownoresults:true,
maxresults:6
};
var as_json2 = new bsn.AutoSuggest('studierichting', richtingen);
});
function getTheString() {
return "/profiel/search_richting?json=true&limit=6&id=" + school_id + "&";
}
</script>
This is because the URL is static, it is not updated as the ID changes.
You should update the URL as part of the code you wrote to get the ID:
$("#school").blur(function() {
school_id = $("#school_id").val();
// update URL here ...
});
Aren't you concatenating script:"/profiel/search_richting?json=true&limit=6&id=" + school_id + "&" before the event is fired and the var updated?
Okay. So the problem was my third party plug-in instead of the code I wrote. I fixed this by editing the code of the autoSuggest plugin so it now includes my id field in the AJAX request.
var url = this.oP.script+this.oP.varname+"="+encodeURIComponent(this.sInp)+"&id="+ $("#school_id").val();
Thanks to everyone who tried to help me out!
I'm working using scriptaculous library. However I'm facing some issues with inclusion of the JSON library for the prototype library. It adds a toJSONSTring and parseJSONSTRING method to all objects automatically and frankly this is causing havoc in places. Like I can't seem to use the Ajax Updater function and I suspect its because of this toJSONSTring method that has been attached to my options object which I pass to it.
Is there anyway to unset or atleast somehow remove a function which has been added to the Object.
EDIT:::
Actually I'm trying to make an ajax request and I'm facing an issue in the
Ajax.Updater = Class.create(Ajax.Request,....
part of the prototype library. At the part where its supposed to execute and post an AJAX request it doesn't - especially at:
$super(url, options);
To be precise I'm using this sortable and editable table grid here at this url:
http://cloud.millstream.com.au/millstream.com.au/upload/code/tablekit/index.html
Basically you clcik on a table cell to edit it and push the OK button to confirm. Upon clicking the button an ajax request is made.
The editable feature of the table calls the Ajax updater as follows in a submit function:
submit : function(cell, form) {
var op = this.options;
form = form ? form : cell.down('form');
var head = $(TableKit.getHeaderCells(null, cell)[TableKit.getCellIndex(cell)]);
var row = cell.up('tr');
var table = cell.up('table');
var ss = '&row=' + (TableKit.getRowIndex(row)+1) + '&cell=' + (TableKit.getCellIndex(cell)+1) + '&id=' + row.id + '&field=' + head.id + '&' + Form.serialize(form);
this.ajax = new Ajax.Updater(cell, op.ajaxURI || TableKit.option('editAjaxURI', table.id)[0], Object.extend(op.ajaxOptions || TableKit.option('editAjaxOptions', table.id)[0], {
postBody : ss,
onComplete : function() {
var data = TableKit.getCellData(cell);
data.active = false;
data.refresh = true; // mark cell cache for refreshing, in case cell contents has changed and sorting is applied
}
}));
},
The problem is that the request is never made and I keep pushing the OK button to no avail.
EDIT::::::::::::::::
I'm still stumped here - I've even tried calling the Ajax.Updater function on my own and it won't work at all. Its like this function has officially been rendered as useless all of a sudden. I've made the changes you said but all to no avail :( frankly I'm running out of options here - another idea would be to ditch this tablekit and look for something else which has similar functionality in the hopes that THAT MIGHT work!
It sounds like those methods are being added to the prototype of Object. By adding to Object's prototype, the library is automatically giving everything that derives from Object (in other words, everything) those methods as well. You might want to take do some reading on Prototypal inheritance in Javascript to get a better handle on this.
Anyway, you can remove those methods by doing this:
delete Object.prototype.toJSONString;
delete Object.prototype.parseJSONString;
You can delete anything from an object using "delete":
a.toJSON = function () {};
delete a.toJSON;
a.toJSON() => error: toJSON is not a function
a.toJSON => undefined
However I don't think that what is happening happens because of what you think is happening :) Maybe give more details on the problem you have with Ajax.Updater?
Seen the edit. OK, can you also post the actual line of code that calls Ajax.Updater and, also important, explain in detail how the options object you feed to it is made?
Also, please make sure you're doing something like this:
new Ajax.Updater(stuff)
and NOT just:
Ajax.Updater(stuff)
You NEED to create a new Updater object and use "new" (most probably you're already doing that, just making sure).
OK I'm still not sure what is getting passed to ajax.Updater since you extend stuff that I can't see, but try this: remove the "&" from the beginning of the variable "ss"; in the options object use parameters: ss instead of postBody: ss.
delete obj.property
In this case:
delete obj.toJSONSTring;
delete obj.parseJSONSTRING;