In the past I’ve been able to work with DOM elements using mounted() and $nextTick() but in my current project the component rendering isn’t complete when $nextTick runs.  
mounted() {

this.$nextTick(() => {


console.log(document.querySelectorAll(".dropdown-button"));

});
},  This reports “NodeList []” in the console. But if I try the DOM query in the console after the page loads I get “NodeList [a.dropdown-button]”  I am using vue-router if that has any effect on this.