ivi | Lighweight Embeddable Web UI Library | Frontend Framework library
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Lighweight Embeddable Web UI Library
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of ivi
ivi Key Features
ivi Examples and Code Snippets
def IVI(self, a=None, b=None):
"""
Ideal vegetation index
https://www.indexdatabase.de/db/i-single.php?id=276
b=intercept of vegetation line
a=soil line slope
:return: index
"""
return (
Community Discussions
Trending Discussions on ivi
QUESTION
I have some nested angular components that are giving me some problems with Event Emitters. The structure goes something like this:
...ANSWER
Answered 2022-Mar-14 at 22:13This is a bit of a guess, but if you have the exact same id
on the toggle component could that be affecting it e.g.
Maybe make this id
dynamic
QUESTION
I have upgraded My Angular CLI project from 8 to 9.
Here are the current Angular CLI and other package versions:
...ANSWER
Answered 2021-Dec-17 at 14:04Run this command npm i @ngtools/webpack
and after @
mention which version you want, same as your Angular version.
QUESTION
i am new to angular and trying to share data between pages on load of main page , i am using angular dynamic forms to create dynamic pages. my main page consist of child components pages that load in main page but when the data from my main page is passed to the child page using providers on page load the data reaches the child but doesnt store it in variable of child page
main page:
...ANSWER
Answered 2022-Feb-08 at 07:43A common pattern in Angular is sharing data between a parent component and one or more child components. Implement this pattern with the @Input() and @Output() decorators.
Sending data to a child component
It is necessary to create a variable with @Input()
decorator:
QUESTION
I am new to angular and was following the documentation to build a basic app.
Node - v14.7.3
npm - 7.22.0
Angular CLI: 12.2.4
OS: win32 x64
@angular-devkit/architect 0.1202.4
@angular-devkit/build-angular 12.2.4
@angular-devkit/core 12.2.4
@angular-devkit/schematics 12.2.4
@schematics/angular 12.2.4
rxjs 6.6.7
typescript 4.3.5
So far all I have done is
npm install @angular/cli
followed by ng new firstApp
and ng serve
Following is the error that I am receiving,
...ANSWER
Answered 2021-Sep-10 at 07:17Try to install those modules separately npm install
:
QUESTION
I'm trying to generate form fields dynamically based on some JSON object(config). This said config object contains all the attribute values required for constructing form fields(ex: label
, type
, placeholder
etc).
In my parent component: I have a form, under which I have an ngFor
, iterating over the config object, trying to generate the fields.
ANSWER
Answered 2021-Dec-28 at 16:03In the Child Component viewProviders
array, we can provide ControlContainer
to use existing NgForm
instance:
QUESTION
I've created a custom input component by implementing the ControlValueAccessor
interface. Then, I put it on a form with required validation by setting the required
property to true
. However, it's giving me a "required" error even when the input is filled - in other words, model.errors.invalid
is true even after I fill the field.
A reproducible example is available on StackBlitz, but here is some of the code.
Component ...ANSWER
Answered 2021-Dec-10 at 13:01You need to place the onChange
in the setter instead of of writeValue
, that should solve your issue as now the new value will actually be set, it didnt before and thus remained as required (as no value). Also remember to use optional chaining in displaying your error, otherwise it will throw a browser console error.
So remove the onChange
from writeValue
and set it in the setter:
QUESTION
Im working through some self-join examples and I am drawing a blank on the following example. Its the last example at the following link Self-Join Example
...ANSWER
Answered 2021-Nov-26 at 15:51If you didn't have any condition on employee ID at all you'd end up with records where a self-match had occurred, e.g. the results would show "Gracie Gardner was hired on the same day as Gracie Gardner"
We could then put ON e1.employee_id <> e2.employee_id
- this would prevent Gracie matching with Gracie, but you'd then find "Gracie Gardner was hired on the same day as Summer Payne" and "Summer Payne was hired on the same day as Gracie Gardner" - i.e. you'd get "duplicate records" in terms of "person paired with person", each name being mentioned both ways round
Using greater than prevents this, and effectively means that any given pair of names only appears once. Because Gracie's ID is less than Summer's, you'll get Gracie in e1
paired with Summer in e2
but you won't get Summer in e1
paired with Gracie in e2
Another way of visualizing it is with a square/matrix
QUESTION
I am seeing below error. Can you please suggest a solution to fix it. I am using angular 12. The below snippet of code is from angular website, i just modified a bit to use renderRows from cdkTable to understand how it works, and its giving error for me.
...ANSWER
Answered 2021-Nov-22 at 17:59As far as I can see you're trying to access cdkTable
withing ngOnInit
hook. But when the hook is triggered your template elements don't exist yet. So @ViewChild('cdkTable')
will be undefined at the moment.
You should move your code into another hook called ngAfterViewInit
. It's triggered right after the view gets initialized. So you can access your template references.
More about responding to view changes you can read here.
QUESTION
I would like to animate multiple elements from a starting position to an end position in an individual sequence (when card0
finishes, card1
should start). The starting position element is defined in a different Angular component. The cards are defined in an Observable
element and are currently displayed at the same time when you click the button.
In the image you can see that card0
should move from start
to the bottom card0
element. After that, the same should happen with card1
, then with card2
I currently only managed to animate the observable elements. I would like to find out how to animate them individually and how to let them flow from a starting position from the other component.
Here is a StackBlitz
...ANSWER
Answered 2021-Nov-07 at 22:22it's a bit complex because to move a tag from a position to another you need know the position initial and final.
Imagine you has an animation like:
QUESTION
I have written the code to display the angular modal dialog, but I don't know how to align it center and make it fit inside the parent component when screen is large I want it to be centered.
But what happens is that is overflows right and left with the modal dialog background.enter code here
Post List Components
...ANSWER
Answered 2021-Oct-17 at 00:04After work around I decided to set mat-dialog transparent,set box shadow to none and change scroll strategy to scrollStrategy: new NoopScrollStrategy()
The codes updated are as follows as per question above:
Post List Component
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