Finding the row index in an Angular material table

How can I retrieve the row index in an Angular material table?

 <td mat-cell *matCellDef="let row">                                                                            
   <mat-checkbox (click)="$event.stopPropagation()"                                                                                
     (change)="$event ? selection.toggle(row) : null;isSomeSelected()"                                                                               
     [checked]="selection.isSelected(row)">                                                                           
 </mat-checkbox></td>
javascriptangulartypescriptcheckboxmaterial-table

Answer №1

To define an index, you can use the following syntax let i = index:

 <td mat-cell *matCellDef="let row;let i = index">                                                                            
   <mat-checkbox (click)="$event.stopPropagation()"                                                                                
     (change)="$event ? selection.toggle(row) : null;isSomeSelected()"                                                                               
     [checked]="selection.isSelected(row)">                                                                           
 </mat-checkbox></td>

Answer №2

Declare the index property within the RowModel in your .ts file.

This will allow you to access it using row.index in both the template and controller.

.ts:

const ELEMENT_DATA: PeriodicElement[] = [
  {position: 1, name: 'item1', index: 0},
  {position: 2, name: 'item2', index: 1},
  {position: 3, name: 'item3', index: 2},
];

.html:

<td mat-cell *matCellDef="let row">                                                                            
  <mat-checkbox (click)="$event.stopPropagation()"                                                                                
                (change)="$event ? selection.toggle(row) : null;isSomeSelected()"                                                                               
                [checked]="selection.isSelected(row)">                                                                       
  </mat-checkbox>
  <span>{{row.index}}</span>
</td>

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

Is there a way to inform TypeScript that the process is defined rather than undefined?

When I execute the code line below: internalWhiteList = process.env.INTERNAL_IP_WHITELIST.split( ',' ) An error pops up indicating, Object is possibly undefined. The env variables are injected into process.env through the utilization of the mod ...

javascriptnode.jstypescriptecmascript-6

Understanding the fundamental concepts of callbacks with Backbone.js

Currently, I am working with Backbone to send a login form to my server. Once the form is submitted and the database query is successful, a boolean value is flipped to enable GET responses from the server. However, the issue arises when it attempts to fetc ...

javascriptnode.jsrestbackbone.js

Adjusting the width of a div element horizontally in Angular 4 and

As someone new to Angular 4, I've been attempting to create a resizable div (horizontally) without success. My goal is to be able to click and drag a grabber to resize the text area horizontally. However, in the example provided in the link below, the ...

htmlcssangular

Having difficulty retrieving the REST service response in Angular

While I am able to successfully call the REST service within our company's VPN using Firefox and Chrome, I am facing challenges connecting to it from Angular 2. Despite attempting to access the REST service through various methods, I consistently enco ...

restangularcors

Animate a div once the parent section becomes visible while scrolling

I previously had this function working, but it seems that I have somehow messed it up in the process. My current setup includes a scroll hijack feature that navigates users to a new section or card each time they scroll. The script adds a visible class w ...

javascriptjqueryhtmlcssscrollview

Error encountered with NodeJS Express Module: TypeError - Unable to access property 'finished' as it is undefined

Recently, I've been working on creating an API that can extract text from a website based on specific keywords. To achieve this, I utilized Selenium to load the site and retrieve the text. However, I encountered an issue with sending the extracted tex ...

javascriptnode.jsapiseleniumexpress

Reactjs encountering issues loading css file

Currently, I am working on a project in Reactjs with Nextjs. To add CSS to my project, I have stored my CSS files in the 'styles' folder. In order to include them, I created a file called '_document.js' and implemented the following cod ...

javascriptcssreactjsnext.js

Angular2's ErrorHandler can cause code to malfunction when an error occurs

import { Injectable, ErrorHandler, Inject, Injector } from '@angular/core'; import { MessengerService } from '../services'; import { MessageTypeEnum } from '../../shared'; @Injectable() export class AppErrorHandler extends Er ...

angulartypescripterror-handling

Using Jquery to handle different status codes in an Ajax request

Currently, I am handling statusCode of 200 and 304 in a jQuery Ajax call. Additionally, I have defined an "Error" function to catch any errors that may occur. If a validation message is related, we specify the status code as 400 - Bad Request. In this sc ...

javascriptjqueryajaxhttp-status-codes

unable to utilize a tip with d3 version 5 in a TypeScript environment?

i'm facing an issue with the following code snippet: var tip = d3.tip() .attr('class', 'd3-tip') .attr('id', 'tooltip') .html(function(d) { return d; }) .direction('n ...

typescriptd3.js

Issue with the loop function

When I try to loop through my code, I keep getting the same "y" value (5) and it doesn't change. What I actually want is to make the ajax call repeat X times [all], passing both the response and the current call number through an anonymous function. A ...

javascriptjqueryloopsfor-loop

The cloud function that is callable is currently inactive and encountering errors upon invocation

I am experiencing issues with my Cloud Function which is supposed to call a request to the URL passed to it. This is my first time using TypeScript to make a request, so I added some print calls to troubleshoot the problem. However, the first log never app ...

typescriptfirebasegoogle-cloud-functions

Upon hovering, icons for each project name are displayed when `mouseenter` event is triggered

My issue lies with the mouseenter function. I am trying to display icons specific to the project name I hover over, but currently, it displays icons for all projects at once. I want each project hovered over to show me its respective icons Below is some c ...

htmlcssangulartypescript

What is the best way to conceal a parent element with jquery?

Let's say we have the following HTML structure: <li class="fooli"> <a class="foo" href="javascript:foo(this);">anchor</a> </li> <li class="fooli"> <a class="foo" href="javascript:foo(this);">anchor</a> ...

javascriptjqueryhtml

Having trouble with bootstrap carousel malfunctioning on Firefox browser?

I'm experiencing an issue with the carousel slider on my website. It seems to only be working in Chrome and not in Mozilla Firefox. You can view the live site at: Below is the code I have used for the carousel: <header id="myCarousel" class="car ...

javascriptjquerycsstwitter-bootstrap

Can we rely on JavaScript to maintain the order of object properties?

Let's say I define an object in the following way: var obj = {}; obj.prop1 = "Foo"; obj.prop2 = "Bar"; Is it guaranteed that the object will always appear exactly like this? { prop1 : "Foo", prop2 : "Bar" } In other words, will the properties reta ...

javascriptobject

JQuery Ajax Success does not fire as expected

I am facing an issue with my ajax call where the success function is not getting triggered. My controller gets called and the code executes without any errors. However, since my method returns void, I am not returning anything. Could this be the reason why ...

javascriptjqueryajaxasp.net-mvc

Validating image dimensions with the data-parsley plugin

Is there a way to validate image dimensions with data-parsley? I attempted the code below, but it is not working. data-parsley-dimensions-options='{ "min_width": "100", "max_width": "100", "m ...

javascriptphpjsonparsley.js

Using Selenium with Python to interact with a dynamically generated object that does not have an identifying id or name

Whenever a Right click is performed, an options popup/screen will appear with dynamic content/element. Here is the Options Popup: https://i.stack.imgur.com/TfxpC.png This dynamic content/element will disappear as soon as the mouse is clicked elsewhere o ...

javascriptpythonseleniumselenium-webdriverweb-inspector

The dilemma of selecting objects in Three.js

Currently, I am developing a small web application that utilizes three.js. However, I have encountered an issue: I created a prototype with my three.js content and everything functions correctly (the canvas size in the prototype matches the browser window ...

javascripthtmlthree.js