Method constructor

src/js/demo2/intro.js:12–21

(el)

export class Intro {
    constructor(el) {
        // the SVG element
        this.DOM = {el: el};
        // SVG texts
        this.DOM.circleText = [...this.DOM.el.querySelectorAll('text.circles__text')];
        // total
        this.circleTextTotal = this.DOM.circleText.length;
        
        this.setup();
    }
    setup() {
        // need to set the transform origin
        // need to set the transform origin in the center