Ember component, d3/jquery select actual element not the component container

New to ember.

How do i select the svg element which my component renders. the variable svg is actually selecting the div that the component is returned in.

export default Ember.Component.extend({
    didRender() {
        let svg = d3.select('#'+this.get('elementId'));
        console.log("chart init", d3.selectAll('.chart-d3'), svg)
    }
});

Also any tips on ember component lifecycle and d3 would be useful!