convert HEX to rgba Vue.js

convert.js

    data: {
        return {
            opacity: 50
        }
    },
    methods: {
      convertHex: function (color) {
        color = color.replace('#', '')
        let r = parseInt(color.substring(0, 2), 16)
        let g = parseInt(color.substring(2, 4), 16)
        let b = parseInt(color.substring(4, 6), 16)
        let result = 'rgba(' + r + ',' + g + ',' + b + ',' + this.opacity / 100 + ')'
        return result
      }
    }