Creating Dynamic CSS Styling with Vendor Prefixes in Angular 2

I am exploring how to create a component in Angular 2 with two input arguments: colorOne and colorTwo. The goal is to fill a <div> with a gradient of these two colors.

If I simply wanted to set the div background color to colorOne, I could achieve that easily with

<div [style.background]="colorOne" class="my-box"></div>
. However, when it comes to applying a background gradient, things get a bit trickier due to the vendor prefixing required for the background-gradient property. My initial solution involved JavaScript to detect the browser and apply the appropriate prefix:

public get headerColor () {

    //... determine the browser

    let backgroundStyle = `linear-gradient(left top, ${this.colorOne}, ${this.colorTwo})`;
    if (isWebkit) {
      backgroundStyle = "-webkit-" + backgroundStyle;
    } else if (isO) {
      backgroundStyle = "-o-" + backgroundStyle;
    } else if (isMoz) {
      backgroundStyle = "-moz-" + backgroundStyle;
    }

    return backgroundStyle;

};

Then, I would use

<div [style.background]="headerColor" class="my-box"></div>
. But, I wonder if there is a more elegant solution to achieve this?

Answer №1

To optimize the code, you can consolidate multiple prefixed values into a single string and the specific relevant one will be used:

<div [style]="stylish" class="my-box"></div>
import { DomSanitizer } from '@angular/platform-browser';

...

constructor(private sanitizer: DomSanitizer, ...) { ... }

get stylish() {
    let basicStyle = `linear-gradient(left top, ${this.colorOne}, ${this.colorTwo})`;
    return this.sanitizer.bypassSecurityTrustStyle(`
      background: -o-${basicStyle};
      background: -moz-${basicStyle};
      background: -webkit-${basicStyle};
    `);
}

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