Hello Developer, Hope you guys are doing great. Today at Tutorial Guruji Official website, we are sharing the answer of Angular conditional readonly/disable on input fields without wasting too much if your time.
The question is published on by Tutorial Guruji team.
The question is published on by Tutorial Guruji team.
I have a table with input fields which I am populating with model values, I want to apply readonly/disable to these populated fields. when I click on add row, I add empty rows to the table. The empty rows added to the table must be editable. I am unable to find a logic which applies readOnly/disable only to already populated table cells.
HTML
<table>
<thead>
<th> Name </th>
<th> Age </th>
<th> Url </th>
<th> Gender </th>
<th> Image </th>
<th> Keywords </th>
</thead>
<tbody>
<tr *ngFor="let data of userList; let $index = index">
<td> <input class="form-control" type="text" id="userListName"[(ngModel)]="userList[$index].name"
name="userListName{{$index}}" [readonly]="userList[$index].name.length"/></td>
<td> <input class="form-control" type="text" id="userListAge" [(ngModel)]="userList[$index].age"
name="userListAge{{$index}}" readonly/></td>
<td><input class="form-control" type="text" id="userListUrl" [(ngModel)]="userList[$index].url" name="userListUrl{{$index}}" readonly/></td>
<td> <input class="form-control" type="text" id="userListGender" [(ngModel)]="userList[$index].gender"
name="userListGender{{$index}}" readonly/></td>
<td> <input class="form-control" type="text" id="userListImage" [(ngModel)]="userList[$index].image"
name="userListImage{{$index}}" readonly/>
</td>
<td> <input class="form-control" type="text" id="userListKeywords" [(ngModel)]="userList[$index].keywords"
name="userListKeywords{{$index}}" readonly/></td>
</tr>
</tbody>
<button (click) ="addRow()"> Add Row </button>
</table>
Component:
import { Component, OnInit } from '@angular/core';
@Component({
selector: 'my-app',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
userList: userModel[] = [];
jsonUser = [
{
name: 'abc',
age: 17,
url: "a.com",
gender: "F",
image: "i-ocion.png",
keywords: "blah"
},
{
name: 'cde',
age: 18,
url: "cde.com",
gender: "F",
image: "i-oddcion.png",
keywords: "blahhh"
},
{
name: 'efg',
age: 19,
url: "efg.com",
gender: "F",
image: "i-ocfffion.png",
keywords: "blahhhhhhh"
}
]
ngOnInit() {
this.userList = this.jsonUser;
}
addRow() {
this.userList.push(new userModel);
}
}
export class userModel {
name: string;
age: number;
url: any;
gender: string;
image: string;
keywords: string;
}
Answer
You could declare a variable that identifies the size of the array that comes from backend (like initialArraySize), then when you add a new row you verify if the index of that row is greater than the initial array size, if its true, you make it editable..
<tbody>
<tr *ngFor="let data of userList; let index = index">
<td> <input class="form-control" type="text" id="userListName" [(ngModel)]="userList[index].name"
name="userListName{{index}}" [readonly]="index >== initialArraySize"/></td>
</tr>
</tbody>
We are here to answer your question about Angular conditional readonly/disable on input fields - If you find the proper solution, please don't forgot to share this with your team members.