Formatting string to html angular 2

Question

I am trying to do something as follows, and I have no idea where to start looking it up even.

I am trying to create some object such as this

{ 
 text: "hello {param1}", 
 param1: {
              text:"world", 
              class: "bla"
         }
}

The thing is I want to display it according to the text property like this:

<span> hello <span class="bla"> world </span></span>

Using a component for such thing won't really solve it - the only idea I have is using jquery, and I would like to avoid it. The text property format could be changed if it helps...

Answer 1

I can suggest you an idea like this:

import { Component, Directive, Input, HostBinding } from '@angular/core'

@Directive({
  selector: 'my-template'
})
class MyTemplate {
  @Input() data: Object;
  @HostBinding('innerHTML') get html {
    return Object.keys(this.data).reduce((prev, cur) => {
      if(cur === 'text') return prev;
      const regExp = new RegExp(`{${cur}}`, 'g');
      return prev.replace(regExp, (str) =>{
        return `<${this.data[cur].tag} class="${this.data[cur].class}">
                  ${this.data[cur].text}
                </${this.data[cur].tag}>`; 
      });
    }, this.data.text);
  }
}


@Component({
  selector: 'my-app',
  providers: [],
  template: `
    <div>
      <my-template [data]="obj"></my-template>
    </div>
  `,
  directives: [MyTemplate] 
})
export class App {
  obj = { 
    text: "hello {param1} {param2} please again hello {param1}", 
    param1: {
      tag: 'span',
      text: 'world', 
      class: 'bla'
    },
    param2: {
      tag: 'div',
      text: 'hello world2', 
      class: 'bla'
    }
  };
}

See example in action here http://plnkr.co/edit/G5m7zAxzhybhN5QdnVik?p=preview

Answer 2

One possible way could be like this : In your component class :

let myConfig = {
  salutation : "hello",
  paramText : "world",
  paramClass : "bla"
}

And in your HTML :

<span> {{myConfig.salution}} <span class="{{myConfig.paramClass}}"> {{myConfig.paramText}} </span></span>

Then you could just swap the values of myConfig properties to generate text with the specified class for the paramText accordingly. Is this what you are looking for ?