3

I want to use bind angular2 values in linear-gradient stop offset but its giving me errors. Can someone tell me how can I bind angular2 values in stop offset of linear-gradient as demonstrated below?

test.component.ts

import {Component, EventEmitter, ViewEncapsulation, Input, OnInit} from '@angular/core';


@Component({
selector: 'test-comp',
templateUrl: 'test-component.html',
encapsulation: ViewEncapsulation.None
})

export class TestComponent implements OnInit {

@Input() name: string;
@Input() flexScore: number;

protected goodScore: number;
protected dangerScore: number;
protected isComplete: boolean = false;

 ngOnInit() {
  this.goodScore = this.flexScore;
  this.dangerScore = 100 - this.goodScore;
  console.log(this.goodScore + ' ' + this.dangerScore);
  this.isComplete = true;
 }
}

test-component.html

<div class="individual-athlete-risk">
  <span id="name">{{name}}</span>
  <span id="score">{{flexScore}}</span>
</div>
<svg width="200" height="10" xmlns="http://www.w3.org/2000/svg">
  <defs>
      <linearGradient id="testGradient">
          <stop attr.offset="{{goodScore}}%" stop-color="blue"/>
          <stop attr.offset="{{dangerScore}}%" stop-color="red"/>
      </linearGradient>
  </defs>
  <rect fill="url(/test#testGradient)" x="0" y="0" width="200" height="9"/>
</svg>

Its giving me errors. I want to add gradient line with dynamic values. Please help.

enter image description here

@Gaunter I have updated/edited the code what you said, now the errors removed but still it seems that bar/gradient is constant based on the values determined in OnInit() function. I have checked the goodScore and dangerScore values in OnInit they are correct and not uniform. Any idea?

Hassan Kashif
  • 435
  • 1
  • 7
  • 26

1 Answers1

7

I guess this is what you want:

      <stop [attr.offset]="goodScore" stop-color="blue"/>
      <stop [attr.offset]="dangerScore" stop-color="red"/>

You need either [attrname]="fieldName" or attrname="{{fieldName}}" to get Angular2 binding.
SVG elements don't have properties, therefore you need to do attribute binding, therefore the additional attr. prefix for binding to SVG elements.

Günter Zöchbauer
  • 623,577
  • 216
  • 2,003
  • 1,567