Is there a way in Aurelia to say 'If x == this, then show this'?
To be specific, I have an array of data that looks something like this:
[
{objectID: 1, customDataArray: [1,2,3,4], customDataType: { cdt: "Troops" }}
]
This array obviously has multiple rows that look like the one above where it's passing me an array of custom values that I need to reference. Those values could be the IDs of different 'groups' in our system. That's why we are passing in an object the contains what type of custom data it is. e.g. "Troops"
So what's happening is on Activate, I'm fetching all this data from my API and storing it in a variable. Well based on whether the custom data type is "Troops" or something else, I want to show a different input label. For example, if it is "Troops," I want to show a label that says "input troop id's" and so on.
Also, sometimes the customDataType isn't required so it comes in as null. So in that case, I want to show something different. Not sure how to handle this one..
The if custom attribute or the show custom attribute would work. Unfortunately, we don't have a switch or else type of setup.
<label if.bind="p.customDataType.cdt === 'Troops'">Input Troop Ids</label>
<label if.bind="p.customDataType.cdt !== 'Troops'">Something Different</label>
You could try if if.bind could be useful for this, as below:
<ul>
<li repeat.for="obj of data" if.bind="obj.customDataType">
<span>${obj.customDataType.cdt}</span> -
<strong repeat.for="cda of obj.customDataArray">${cda}, </strong>
</li>
<li repeat.for="obj of data" if.bind="!obj.customDataType">
<span>No CustomDataType</span>
<strong repeat.for="cda of obj.customDataArray">${cda}, </strong>
</li>
</ul>
Here is a plunker that shows this in action: https://gist.run/?id=21991c490810a4acf2e38cec99614bbd
Related
I'm using RiotJS v3.9
I've written a custom tag that accepts a few opts. The problem is that the markup it generates includes all of those opts on the outermost element, in addition to the interior tags where I explicitly deposit them. I do not want any opts to appear on the top element unless I make that happen.
In this case, my custom tag display a list of items. One of the opts it accepts is the value for a specific data- attribute on each list item. So, I want data-something={opts.itemSomething} to appear on each list item, but I do not want that to appear on the wrapper.
// my-list.tag
<my-list>
<ul data-something={ opts.something }>
<li
each={ item in opts.items }
data-something={ parent.opts.itemSomething }
>
{ item }
</li>
</ul>
</my-list>
Using it:
<my-app>
<my-list
something="parent-value"
item-something="child-value"
items={['one', 'two', 'three']}
/>
</my-app>
What it emits into the page:
<my-list something="parent-value" item-something="child-value">
<ul data-something="parent-value">
<li data-something="child-value"> one </li>
<li data-something="child-value"> two </li>
<li data-something="child-value"> three </li>
</ul>
</my-list>
I don't want the emitted <my-list> tag to have either the parent-value or the child-value on it. I only want those attributes to appear on the <ul> and <li>, like I coded it.
// bad output
<my-list something="parent-value" item-something="child-value">
// good output
<my-list>
Is this possible?
Also, I know from working with React that I'm likely to encounter future cases where I want some of the opts to appear on the wrapper while hiding others. So, ideally I'd like to know how to control this behavior on a per-opt basis.
you can remove the unwanted attributes in both the "updated" and "mount" event.
check this demo
However I strongly suggest you to switch to riot#5!!
The title was kinda long-winded but the question itself is pretty simple.
So I'm looping over some strings and want to make a button for each. On click, the button will call a Vue method. I want to bind the string into the HTML element somehow - it will be more clear with the code:
<li v-for="(name, idx) in $store.state.lobby" :key="idx">
<button data-name="{{name}}" v-on:click='send_game_request'> request game </button>
</li>
so, as you can see, this is very simple. When the send_game_request method gets run, it can read the name off the data-name attribute and do what it needs to with that information.
But, this is invalid syntax, because {{name}} raises an error. I'm really hoping I don't have to wrap each button into it's own sub-component, because that is just extra boilerplate that's not necessary.
I've seen other examples that use v-bind but I don't really have any need to store this information in the component's internal state. I literally just need to know what button was pressed.
You can pass the name as an argument with an inline handler:
<button #click="send_game_request($event, name)">
where $event is the original event data.
In addition to what Tony mentions in his answer,
<li v-for="(name, idx) in $store.state.lobby" :key="idx">
<button :data-name="name" v-on:click='send_game_request'> request game </button>
</li>
You could then extract value of name with datasets like so:
function send_game_request(event){
const name = event.target.dataset.name;
}
NOTE: In this instance you don't need to explicitly pass the $event into your v-on:click function binding, it will already be made available by Vue. So, you can simply invoke your method with the event argument.
I'm using a UIKit library for a tab component that listens to a uk-tab property that targets an id. The problem with this, is that it creates the same ID for every tabbed component. I like the UI, but whoever thought of this, didn't think too far into it. I could fix it by making the id dynamic but I am having trouble calling it in the uk-tab property because it is rendering a string. Coming from a react background, I would do a string literal and some JSX, something like #item-${_id}to show #item-12, #item-13....and so on. But That's not working. How can I do this in Vue?
Here is an example of how it works
<div class="mytrigger">
<ul uk-tab="connect: #component-tab-left; animation: uk-animation-fade">
</div>
<div class="mytargetedtab">
<ul id="component-tab-left" class="uk-switcher">
</div>
Here is an example of how what I need
<div class="mytrigger">
<ul uk-tab="connect: #_uid+'switcher'; animation: uk-animation-fade">
</div>
<div class="mytargetedtab">
<ul :id="_uid+'switcher'" class="uk-switcher">
</div>
Check out the dev tools. It should be 810switcher, but instead is taking it as a string
Any ideas? Thanks
I believe what you need is:
<ul :uk-tab="`connect: #${_uid}switcher; animation: uk-animation-fade`">
Or if you prefer not to use backticks:
<ul :uk-tab="'connect: #' + _uid + 'switcher; animation: uk-animation-fade'">
The output will be:
<ul uk-tab="connect: #22switcher; animation: uk-animation-fade">
A few notes:
Using a : is short for v-bind: but don't let the name confuse you. v-bind doesn't necessarily bind anything, it just makes the attribute value a JavaScript expression.
I'd avoid using numbers at the start of element ids, I've seen that cause problems in the past. It'd be better to put the numbers at the end.
The underscore at the start of _uid indicates that it's private to Vue. There are no guarantees about what form it will take or whether it will even exist going forward.
Use data-uk-tab instead of uk-tab like below.
<div class="mytrigger">
<ul data-uk-tab="{connect: `#${_uid}switcher`, animation: 'uk-animation-fade'}">
</div>
<div class="mytargetedtab">
<ul :id="_uid+'switcher'" class="uk-switcher">
</div>
For more information => Switcher with tabs
You can use any javascript expression in a data binding in vue. So, if you bind a string template to the attribute, it'll populate what you expect.
<ul :uk-tab="`connect: #${uid}switcher`'; animation: uk-animation-fade">
Given the following:
<div id="#my-container">
<div class="title">Companies</div>
<div class="tab active tab-apple">Apple</div>
<div class="tab tab-google">Google</div>
</div>
When page is loaded without any tab clicks yet, whichever tab with the default active class, needs to go in the .title div. For the example above, <div class="title">Apple</div>
On click of a tab, the class is switched to active, and vue.js needs to update the .title div once again.
How can this be done with vue.js? I've tried but not able to get it to work as intended.
The answer by David is one way to do it. But Vuejs offers in-line computations for this. So, no need to hook into any CSS event. Here's some code to explain:
Create a data property active_tab, just like David mentioned. And then bind it's value just like he's done it. In your tabs, add an click event and at that event, assign appropriate value to active_tab.
<div class="tab active tab-apple" #click="active_tab = Apple">Apple</div>
<div class="tab tab-google" #click="active_tab = Google">Google</div>
Now, to dynamically assign the active class to the respective tab, make the class attribute, a computed property, like this:
<div
:class="['tab', active_tab == 'Apple' ? 'active' : '', 'tab-apple']"
>
Apple
</div>
What this code is basically doing is, :class makes class a computed property. Then the commas in the array divide the statement. So, the computation will always add tab and tab-apple classes. But, only if active_tab == 'Apple' then ? add 'active' else : add ''
Not sure which CSS framework you are using, but normally I hook into the events thrown by the tab switching (many CSS frameworks provide this access). Once hooked into it, you can write a Vue custom directive that will take that event and use it to update a VM attribute that indicates which tab is active.
Then you can use normal mustache templating to get it into your template:
<div class="title">{{ active_tab }}</div>
I am trying to pass the value in a text box as a query parameter in a dojo data grid and would like to get clarified on two questions listed below. The dojo grid initiates a call to the server with the query params to initiate a search and bring back results (that is diplayed on the data grid)
Is it possible to reload the gird based on the value in the text by invoking refresh (dijit.byId("mygrid").refresh
If yes, how can I pass the value of the text box as a query parameter to the data grid.
Listed below is my relevant code
function reload(){
dijit.byId("mygrid").refresh;
}
<div class="test">
<input id="searchParam" >
<button dojoType="dijit.form.Button" type="submit" onclick=reload()>
Search
</button>
</div>
<div dojoType="dojox.grid.DataGrid"
id="mygrid"
jsid="mygrid"
store="dojox.data.JsonRestStore"
target="<c:url value='members' />">
query="{
searchCriteria: ? TODO How to pass value of text box here?,
}"
rowsPerPage="1000"
autoWidth="true"
autoHeight="true"
selectionMode="single"
selectable="true"
errorMessage="Error loading data"
noDataMessage="<span class='dojoxGridNoData'>No members found.</span>">
</div>
You should be able do something like the following:
function reload() {
var val = dojo.byId('searchParam').attr('value');
dijit.byId("mygrid").setQuery({ propName: val });
}
You will need to properly build the query { propName: val }.