Is it possible to invoke a function exclusively on the center item within an ngx-owl-carousel?

Is there a way to call a function only when an element is in the center of a slider?

This is my HTML:

<owl-carousel-o [options]="customOptions">
    <ng-container *ngFor="let slide of slides">
        <ng-template carouselSlide [id]="slide.id">
            <img [src]="slide.img" (swipeup)="startAnimation('swipeup',$event)">
        </ng-template>
    </ng-container>

</owl-carousel-o>

This is my customOptions:

customOptions: OwlOptions = {
    loop: false,
    center: true,
    dots: false,
    nav: false,
    responsive: {
      0: {
        items: 3
      },
      400: {
        items: 2
      },
      740: {
        items: 3
      },
      940: {
        items: 4
      }
    }
  }

The function startAnimation() should only be triggered if the image is in the center.

I'm new to Angular and would appreciate any guidance on this matter.

Answer №1

To prevent the execution of the rest of your code if the index of your element is not equal to the middle element of slides.length, you can create a guard.

<ng-container *ngFor="let slide of slides; let i = index"> <!-- Get the index here -->
   <ng-template carouselSlide [id]="slide.id">
       <img [src]="slide.img" (swipeup)="startAnimation('swipeup',$event, i, slides.length)"> <!-- Pass the index and length here -->
   </ng-template>
</ng-container>
startAnimation('swipeup',$event, index, slidesLength) { 
  if(index !== (Math.floor((slidesLength- 1) / 2))) {
    return;
  }
}

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Error SCRIPT1002 was encountered in the vendor.js file while using Angular 8 on Internet Explorer 11

Having trouble getting Angular to function properly in IE 11. I've tried all the solutions I could find online. The errors I'm encountering are as follows: SCRIPT1002: Syntax error File: vendor.js, Line: 110874, Column: 40 At line 110874 args[ ...

Referencing a component in a peer module in Angular 2+

Working with Angular 2 - 7: (Images provided below): I have SectionA Module which includes components a and b. Partnered with SectionA is SectionB module consisting of components ba and bb. The overarching parent for BOTH SectionA and SectionB is titled al ...

problems encountered when testing azure containerclient.listblobsbyhierarchy using sinon

I have developed a REST endpoint with the code "/files/lookup", which is designed to receive a query parameter folderPath and return a list of files with details, excluding content but including metadata. The endpoint connects to Azure Blob Stora ...

How does Typescript overlook such a peculiar inconsistency?

I've come across a peculiar situation where Typescript doesn't seem to differentiate between an object like {} and a generic array []. It accepts the latter as input for a function that is supposed to require an object with {}'s structure. ...

Showing a 2D array in HTML using ngFor loop

I need to display a list of arrays in an HTML p-table. Here is the array list: [Array(2), Array(2), Array(2), Array(2), Array(1)] 0: (2) ["abc", "def"] 1: (2) ["ghi", "jkl"] 2: (2) ["mno", "pqr"] ...

Redirecting to an Unverified Website

I encountered an issue in my service.ts file where VeraCode code scan is failing Flaws by CWE ID: URL Redirection to Untrusted Site ('Open Redirect') (CWE ID 601)(16 flaws) Description The web application is vulnerable to URL redirection attacks ...

Encountered an unexpected token error when executing karma-coverage in a project using TypeScript

I have been working on a simple Angular/Typescript project that includes 12 basic unit tests which all pass successfully. However, I am now looking to measure the code coverage of these tests. Despite trying different methods, I have not been able to achie ...

Obtaining parameter types for functions from deeply nested types

I'm currently facing a challenge involving deeply nested parameters. When dealing with non-nested parameters, everything functions smoothly without any issues export type test = { 'fnc1': () => void, 'fnc2': () => void, ...

Error: Cannot access the 'people' property as it is undefined

Can anyone assist me with troubleshooting an issue I'm having while trying to set up a Google People API authentication service in Angular? I keep encountering the following error in the Chrome console: Uncaught (in promise): TypeError: Cannot read ...

Uninitialized Array Member in Angular 8

Can anyone explain why the code snippet below is printing "undefined"? I have created several objects and intended to display the corresponding images, but after iterating through them using ngfor, nothing appeared. To investigate, I logged the array and ...

The click method in the Angular unit test does not seem to be executing successfully

I'm facing a seemingly simple issue where I am unable to confirm that a click handler is being triggered on my component. header.component.ts import { Component, EventEmitter, OnInit, Output } from '@angular/core'; @Component({ selecto ...

TypeScript's attempt to replicate Scala's underscore feature has been implemented, but it proves to

I've been working on a personal project for the past 2 years trying to implement Scala's underscore in TypeScript, but haven't been successful. Here is my attempted implementation and its effect. The only thing that I really care about typi ...

Refreshing specific elements in Angular: A guide to selective change detection

Imagine I have a scenario where 100 divs are displayed on my screen through the *ngFor directive, pulling values from an object structured as follows: {A1: someObject, A2: someOtherObject..., J10: someOtherOtherObject} Upon clicking on A1 and then on J10 ...

Ensure the initial word (or potentially all words) of a statement is in uppercase in Angular 2+

Struggling with capitalizing words in an Angular 2 template (referred to as view) led to an error in the console and the application failing to load, displaying a blank page: Error: Uncaught (in promise): Error: Template parse errors: The pipe 'c ...

Using Next.js and Tailwind CSS to apply a consistent pseudo-random color class both on the server and client side

I am faced with a challenge on my website where I need to implement different background colors for various components throughout the site. The website is generated statically using Next.js and styled using Tailwind. Simply selecting a color using Math.ra ...

Error: Conversion of "2018-01-01-12:12:12:123456" to a date is not possible for the 'DatePipe' filter

<td>{{suite.testSuiteAttributes && suite.testSuiteAttributes.modifiedTimestamp | date: 'yyyy-MM-dd' }} </td> I am trying to display the date in the "05-Feb-2018 11:00:00 PM CST" CST format, but I keep getting an ...

What is the true function of the `as` keyword within a mapped type?

I am new to typescript and I find the usage of as confusing in the following example. type foo = "a" | "b" | 1 | 2; type bar = { [k in foo as number]: any } This example passes type checking. The resulting bar type is transformed i ...

What is the best way to incorporate unique styles into a component element directly from the parent HTML that houses it?

I have created a unique component called app-details-banner-component.html: <div class="container"> <div class="row"> <div class="col-7"> <h1 class="project-title">Details</h1&g ...

What is the best way to combine two responses and then convert them into a promise?

When making two calls, the firstCallData prints data fine. However, when I use + to merge the responses, it returns me the following Response. What is a better approach to achieve this task? main.ts let data = await this.processResponse(__data.Detail ...

Streamline imports with Typescript

Is there a way to import modules with an alias? For example, I have an angular service in the folder common/services/logger/logger.ts. How can I make the import look like import {Logger} from "services" where "services" contains all my services? I've ...