How do i get a value from Kendo UI template - javascript

I have this template:
var template = kendo.template("<div class='relatedItemRow'>"
+ "<span id='relatedItemName'>Related Item #: Number #</span>"
+ "<div class='relatedItemRowInfo'><span >#: Name #</span>"
+ "<a data-relatedItemID='#: Value #' class='removeRelatedItem'>"
+ "<img src= '#: Img #'/</a></div><br class='clear'/></div>");
var data = {
Name: "" + checkbox.getAttribute('flatName'),
Number: $('#relatedItemsList').children().length + 1,
Img: '/Content/images/x_remove.png',
Value: checkbox.value
};
var result = template(data);
$("#relatedItemsList").append(result);
I am able to access the data-relatedItemID by using:
$('#relatedItemsList').children().eq(i).children().last().attr('data-relatedItemID')
But how do I get to the Number field in data? I want to change that one dynamically.
I have tried:
$('#relatedItemsList').children().eq(i).children().attr('Number') == 5
but it does not work. Any idea how to do that?

I know that there is an answer for this question even accepted but I'd like to suggest a different approach that I think it is much simpler and more Kendo UI oriented and is using Kendo UI ObservableObject. This allows you to update an HTML that is bound to the ObservableObject without having to crawl the HTML.
This approach is as follow:
Wrap your data definition with a Kendo Observable Array initialization.
Redefine your template and start using using data-binding.
Append this new template to your HTML.
Bind data to the HTML.
Now you can get current value using data.get("Number") or set a new value using data.set("Number", 5) and the HTML get magically updated.
The code is:
Template definition
<script type="text/kendo-template" id="template">
<div class='relatedItemRow'>
<span id='relatedItemName'>Related Item <span data-bind="text : Number"></span></span>
<div class='relatedItemRowInfo'>
<span data-bind="html : Name"></span>
<a class='removeRelatedItem' data-bind="attr: { data-relatedItemID : Value }">
<img data-bind="attr : { src : Img }"/>
</a>
</div>
<br class='clear'/>
</div>
</script>
data definition as:
var data = new kendo.data.ObservableObject({
Name: "" + checkbox.getAttribute('flatName'),
Number: $('#relatedItemsList').children().length + 1,
Img: '/Content/images/x_remove.png',
Value: checkbox.value
});
and the initialization of the HTML is:
$("#relatedItemsList").append($("#template").html());
Getting current value of Number is:
var old = data.get("Number");
Setting is:
data.set("Number", 5);
Running example in JSFiddle here : http://jsfiddle.net/OnaBai/76GWW/

The variable "result" and thus the data you're trying to change aren't a Kendo templates, they're just html created by the template, and the number is just text in the html. To modify the number without rebuilding the whole string, you need to change the template so you can select the number by itself with jQuery by putting it in it's own element, and adding something to identify it.
var template = kendo.template("<div class='relatedItemRow'><span id='relatedItemName'>Related Item <span class='relatedNumberValue'>#: Number #</span></span><div class='relatedItemRowInfo'><span >#: Name #</span><a data-relatedItemID='#: Value #' class='removeRelatedItem'><img src= '#: Img #'/</a></div><br class='clear'/></div>");
//other code the same
And once you can select it, then you can change it like this.
$('#relatedItemsList').children().eq(i).find('.relatedNumberValue').text(5);
And retrieve it like this.
var foo = $('#relatedItemsList').children().eq(i).find('.relatedNumberValue').text();

Related

KoJs: bind a dynamic number of text boxes to elements of an array

I have a front-end which allows for adding and removing of text boxes suing the foreach binding. A text box looks something like this
<div id="dynamic-filters" data-bind="foreach: filterList">
<p>
<input type="text" data-bind="textInput: $parent.values[$index()], autoComplete: { options: $parent.options}, attr: { id : 'nameInput_' + $index() }"/>
</p>
</div>
What I want to do, as shown in the code above is to bind each of these dynamically generated text boxes to an element in the array using the $index() context provided by knockout.js
However it doesn't work for me, my self.values=ko.observableArray([]) doesn't change when the text boxes change.
My question is, if I want to have a way to bind these dynamically generated text boxes, is this the right way to do it? If it is how do I fix it? If it's not, what should I do instead?
Thanks guys!
EDIT 1
the values array is an observable so I thought I should unwrap it before use. I changed the code to
<input type="text" data-bind="textInput: $parent.values()[$index()], autoComplete: { options: $parent.options}, attr: { id : 'nameInput_' + $index() }"/>
This works in a limited way. When I add or change the content of text boxes, the array changes accordingly. However when I delete an element it fails in two ways:
If I delete the last item, the array simply doesn't change
If I delete an item in between, everything is shifted back
I suppose I have to add a function that changes the text-input value before destroying the text box itself.
Any help or advice on how to do this?
I would suggest taking the array of values and mapping it to some kind of model first, then dumping it into the filterList ko.observableArray. It can be as complex or as simple as need be.
That way you have direct access to those properties at the ko foreach: level instead of having to do the goofy index access.
I've added a simple knockout component example as well to show you what can be achieved.
var PageModel = function() {
var self = this;
var someArrayOfValues = [{label: 'label-1', value: 1},{label: 'label-2', value: 2},{label: 'label-3', value: 3},{label: 'label-4', value: 4}];
this.SimpleInputs = ko.observableArray(_.map(someArrayOfValues, function(data){
return new SimpleInputModel(data);
}));
this.AddSimpleInput = function(){
self.SimpleInputs.push(new SimpleInputModel({value:'new val', label:'new label'}));
};
this.RemoveSimpleInput = function(obj){
self.SimpleInputs.remove(obj);
}
}
var SimpleInputModel = function(r) {
this.Value = ko.observable(r.value);
this.Label = r.label;
};
var SimpleInputComponent = function(params){
this.Id = makeid();
this.Label = params.label;
this.Value = params.value;
function makeid() {
var text = "";
var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
for (var i = 0; i < 5; i++)
text += possible.charAt(Math.floor(Math.random() * possible.length));
return text;
}
}
ko.components.register('input-component', {
viewModel: SimpleInputComponent,
template: '<label data-bind="text: Label, attr: {for: Id}"></label><input type="text" data-bind="textInput: Value, attr: {id: Id}" />'
})
window.model = new PageModel();
ko.applyBindings(model);
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.4.2/knockout-min.js"></script>
<!-- ko if: SimpleInputs -->
<h3>Simple Inputs</h3>
<!-- ko foreach: SimpleInputs -->
<input-component params="value: Value, label: Label"></input-component>
<button data-bind="click: $parent.RemoveSimpleInput">X</button>
<br>
<!-- /ko -->
<!-- /ko -->
<button data-bind="click: AddSimpleInput">Add Input</button>
EDIT (7/16/2020):
Mind explaining this without requiring lodash? I literally googled "how to lodash map using plain javascript". Excellent answer otherwise! – CarComp
In this scenario the lodash _.map method could be overkill unless you are executing the script in an environment that does not have native support for the vanilla array map method. If you have support for the vanilla method, go ahead and use that. The map method essentially iterates over each array using the method it is handed to return a transformed array of the original items. Implementation of vanilla code would look like so.
this.SimpleInputs = ko.observableArray(someArrayOfValues.map(function(data) {
return new SimpleInputModel(data);
}));
Here we are taking the values of someArrayOfValues and telling it to use each item to build a new SimpleInputModel and return it using that item data. [SimpleInputModel, SimpleInputModel, SimpleInputModel, SimpleInputModel] is what the new array turns into after mapping. Each of these items has all the functionality described in the SimpleInputModel class, Value and Label.
So with the new array you could, if you wanted, access the values like this as well self.SimpleInputs[0].Value() or self.SimpleInputs[0].Label
Hope that helps to clarify.

How to render Html tags passed as string property in React.js

Is it possible to pass HTML tags as properties and then render in React.js
For example ES2015 syntax:
I add the property as a string with HTML tags:
renderItems(posts) {
var groupDate = this.props.item.date.toUpperCase();
var listCol = '<h4>' + groupDate.toString() + '</h4>';
return (<ViewList list={posts} postCol1={listCol}/>);
}
And in my ViewList component I have:
<div className="col-md-9">{this.props.postCol1}</div>
This is rendered as :
<h4>JANUARY 28TH, 2016</h4>
How do I get react to render the date excluding the HTML tags?
Different views uses this component and tags may be different explaining why I would like to include the tag.
This actually worked:
renderItems(posts) {
var groupDate = this.props.item.date.toUpperCase();
return (<ViewList list={posts} postCol1={<h4>{groupDate.toString()}</h4>}/>);
}
Take the <h4> tags out of the listCol string. Your ViewList component should render them:
<div className="col-md-9">
<h4>
{this.props.postCol1}
</h4>
</div>

How to use function in Kendo Grid Column Template with AngularJS

I have a column in a Kendo grid that I want to perform some specific logic for when rendering, and am using Angular. I have the grid columns set up using the k-columns directive.
After looking at the documentation, it seemed simple: I could add the template option to my column, define the function to perform my logic, and pass the dataItem value in. What I have looks something like this:
k-columns='[{ field: "Name", title: "Name",
template: function (dataItem){
// Perform logic on value with dataItem.Name
// Return a string
}
}]'
However, running this causes a syntax error complaining about the character '{' that forms the opening of the block in my function.
I have seen several examples of defining a template function in this format. Is there something else that needs to be done for this to work? Am I doing something incorrectly? Is there another way of defining the template as a function and passing the column data to it? (I tried making a function on my $scope, which worked, except I couldn't figure out how to get data passed into the function.)
Thank you for your help.
It appears that defining a column template in this fashion isn't supported when using AngularJS and Kendo. This approach works for projects that do not use Angular (standard MVVM), but fails with its inclusion.
The workaround that a colleague of mine discovered is to build the template using ng-bind to specify a templating function on the $scope, all inside of a span:
template: "<span ng-bind=templateFunction(dataItem.Name)>#: data.Name# </span>"
This is the default column templating approach that is implemented by Telerik in their Kendo-Angular source code. I don't know yet if the data.Name value is required or not, but this works for us.
Warning: Don't have access to Kendo to test the code at the moment, but this should be very close
In your case, you are assigning a a string to the value of k-columns and that string contains the the word function and your curly brace {
You need to make sure the function gets executed ... something like this:
k-columns=[
{
field: "Name",
title: "Name",
template: (function (dataItem){
// Perform logic on value with dataItem.Name
// Return a string
}())
}
];
Note the difference:
We create an object -- a real honest-to-goodness object, and we use an IIFE to populate the template property.
Maybe, it will be useful for someone - this code works for me too:
columns: [
{
field: "processed",
title:"Processed",
width: "100px",
template: '<input type="checkbox" ng-model="dataItem.processed" />'
},
and you get the two-way binding with something like this:
<div class="col-md-2">
<label class="checkbox-inline">
<input type="checkbox" ng-model="vm.selectedInvoice.processed">
processed
</label>
</div>
This can be done via the columns.template parameter by supplying a callback function whose parameter is an object representing the row. If you give the row a field named name, this will be the property of the object you reference:
$("#grid").kendoGrid({
columns: [ {
field: "name",
title: "Name",
template: function(data) {
return data.name + "has my respect."
}
}],
dataSource: [ { name: "Jane Doe" }, { name: "John Doe" } ]
});
More information is available on Kendo's columns.template reference page.
After hours of searching. Here is the conclusion that worked:
access your grid data as {{dataItem.masterNoteId}} and your $scope data as simply the property name or function.
Example
template: '<i class="fa fa-edit"></i>',
I really hope this safes somebody life :)
just use like my example:
}, {
field: "TrackingNumber",
title: "#T("Admin.Orders.Shipments.TrackingNumber")",
//template: '<a class="k-link" href="#Url.Content("~/Admin/Shipment/ShipmentDetails/")#=Id#">#=kendo.htmlEncode(TrackingNumber)#</a>'
}, {
field: "ShippingMethodName",
title: "#T("Admin.Orders.Shipments.ShippingMethodName")",
template:function(dataItem) {
var template;
var ShippingMethodPluginName = dataItem.ShippingMethodPluginName;
var IsReferanceActive = dataItem.IsReferanceActive;
var ShippingMethodName = dataItem.ShippingMethodName;
var CargoReferanceNo = dataItem.CargoReferanceNo;
var ShipmentStatusId = dataItem.ShipmentStatusId;
if (ShipmentStatusId == 7) {
return "<div align='center'><label class='label-control'><b style='color:red'>Sipariş İptal Edildi<b></label></div>";
} else {
if (ShippingMethodPluginName == "Shipping.ArasCargo" || ShippingMethodPluginName == "Shipping.ArasCargoMP") {
template =
"<div align='center'><img src = '/content/images/aras-kargo-logo.png' width = '80' height = '40'/> <label class='label-control'><b>Delopi Aras Kargo Kodu<b></label>";
if (IsReferanceActive) {
template =
template +
"<label class='label-control'><b style='color:red; font-size:20px'>"+CargoReferanceNo+"<b></label></div>";
}
return template;
}

Javascript Need to pull a value from a function within an array

Here is my code:
<script>
window.addEvent('domready', function(){
new Request.Stocks({
stocks: ['SXCL'],
onComplete: function(yahoo){
var result = '';
Array.each(Array.from(yahoo.query.results.quote), function(quote){
result += '<div class="company-ticks"></div>
<span class="company">Steel Excel ({Name})</span>
<span class="sub-info"> - OTC Markets<span> </div> <div><span class="value">
{LastTradePriceOnly}</span><span class="changeup">
<img src="change-up.gif" class="change-img" />{Change}
({ChangeinPercent})</span></div></div>'.substitute(quote);
}, this);
$('stocks').set('html', result);
},
onRequest: function(script){
$('stocks').set('text', 'Loading...');
}
}).send();
// Request.Stocks.element.js
});
</script>
You see where I have the variable {Change]. I need to determine if this variable is a positive or negative value. If it is positive then it should display the class as "changeup" and the image as change-up.gif. If the value is negative then the class displayed should be "changedown" and the image would be change-down.gif
The images are a green arrow up and a red arrow down. The classes make the color altrenate between red and green.
Because this is within an array thats being called using a function I'm not sure how to go about this. I assume I would have to split up my "result" into 3 sections. The section before, the section that sets the class and the image, and then the rest of the result.
Any help would be appreciated.
This uses Javascript with mooTools. It's pulling a stock quote from yahoo.
I made the assumption that the Change variable was a property of the quote object. Otherwise that's an easy fix in the code bellow.
Array.each(Array.from(yahoo.query.results.quote), function (quote) {
quote.changeImage = (quote.Change > 0) ? 'change-up.gif' : 'change-down.gif';
result += '<div class="company-ticks"></div>
<span class="company">Steel Excel ({Name})</span>
<span class="sub-info"> - OTC Markets<span> </div> <div><span class="value">
{LastTradePriceOnly}</span><span class="changeup">
<img src="{changeImage}" class="change-img" />{Change}
({ChangeinPercent})</span></div></div>'.substitute(quote);
}, this);
Please note, producing HTML in the was you are doing is a bit risky and hard to maintain.

CanJS/JavascriptMVC: How to store a view template in a variable

Is it possible to define a view template in a javascript variable, instead of a script tag or a file?
Something like this:
var template = "< h1 ><%= title %> < / h1 >";
var rendered = can.view.render(template, data);
Ok, after a lot of research, because it isn't written in documentation, I found how to do it.
The trick is that you have to register your template with an id first.
If you are using a script tag or url to find a template, this step is done automatically by canJS.
So, if you want to render a template, stored in a variable, you have to do something like this:
var template = "< h1 ><%= title %> < / h1 >";
can.view.ejs('my-view-id', template);​​​​​​​
var rendered = can.view.render('my-view-id', data);
Now you have the document fragment in rendered.
Take a look to jquery utils string format plugin. There is an example that shows rendering html from template that was defined as as string.
Creating template:
$.tpl('tweet', [
'<div id="tweet-{id:s}" class="tweet">',
'<div class="tweet-body"><b>#{from:s}</b>: {body:s}',
'(<a href="{href:s}" class="tweet-date">',
'<abbr title="{timestamp:s}">{timesince:s}</abbr>',
'</a>)',
'</div>',
'</div>'
]);
Rendering:
$.getJSON('/tweets/username/', function(resp, s){
$.each(resp.tweets, function(idx, tweet) {
$.tpl('tweet', {
id: tweet.id,
body: tweet.body,
from: tweet.screen_name,
timestamp: tweet.pub_time,
timesince: $.timeago(tweet.pub_time)
}).appendTo('#tweet-list');
});
});

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