salix/print/core/mixins/image-src.js

const Vue = require('vue');
const imageSrc = {
    methods: {
        getSrc(image) {
            let src = `cid:${image}`;

            if (this.isPreview === 'true')
                src = `/api/assets/${this.$options.name}/images/${image}`;

            return src;
        }
    },
};

Vue.mixin(imageSrc);