其实挺简单的
参考https://quasar.dev/vue-components/icon#svg-usage
Syntax: "<path>&&<path>&&...|<viewBox>"
           P       P             V
                (optional)   (optional)
                             (default: 0 0 24 24)
P is a path tag with following syntax (each are attributes):
        "<d>@@<style>@@<transform>"
        (required)
            (optional)
                     (optional)
简单来说
就是svg的path拼一起都用&&,viewBox前加个|
没了
我们可以看看栗子
// Simplest ("<path>"):
  M9 3L5 6.99h3V14h2V6.99h3L9 3zm7 14.01V10h-2v7.01h-3L15 21l4-3.99h-3z
// equivalent to:
<svg viewBox="0 0 24 24">
  <path d="M9 3L5 6.99h3V....."/>
</svg>