Do you know of a more efficient solution to handle a situation like this?
<tr [style.background]="level == 'ALARM' ? 'violet' : level == 'ERROR' ? 'orange' : level == 'WARNING' ? 'yellow' : 'white'">
If I had 10 levels, it would become hard to read.
In order to access various colors, you can store values in an object and retrieve them using specific key properties
compoment.ts
colorMap = {
'ALARM': 'violet',
'ERROR': 'orange',
'WARNING': 'yellow',
'DEFAULT': 'white'
}
component.html
<tr [style.background]="colorMap[level]">
To solve this problem, a simple pipe can be used
@Pipe({
name: "mypipe",
pure: true
})
export class MyPipe implements PipeTransform {
public transform(level: string): string {
return level == 'ALARM' ?
'violet' : level == 'ERROR' ?
'orange' : level == 'WARNING' ?
'yellow' : 'white';
}
}
How to use:
<tr [style.background]="level | mypipe">
Custom pipe for color coding:
import { Pipe, PipeTransform } from '@angular/core';
@Pipe({
name: 'levelPipe'
})
export class LevelPipe implements PipeTransform {
transform(value: any, args?: any): any {
return LevelsMap[value];
}
}
export const LevelsMap = {
ALARM: 'violet',
ERROR: 'orange',
WARNING: 'yellow',
OTHER: 'white'
};
How to use:
<div [style.background]="level | levelPipe">Example</div>
View the live demo here: Demo app
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