thinking bubble icon

SVG

<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 24 24"><g fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M7.9 20A9 9 0 1 0 4 16.1L3 21z"/><circle cx="8.5" cy="11.5" r="1.1" fill="currentColor" stroke="none"><animate attributeName="opacity" values=".2;1;.2" dur="1.2s" begin="0s" repeatCount="indefinite"/></circle><circle cx="12" cy="11.5" r="1.1" fill="currentColor" stroke="none"><animate attributeName="opacity" values=".2;1;.2" dur="1.2s" begin="0.2s" repeatCount="indefinite"/></circle><circle cx="15.5" cy="11.5" r="1.1" fill="currentColor" stroke="none"><animate attributeName="opacity" values=".2;1;.2" dur="1.2s" begin="0.4s" repeatCount="indefinite"/></circle></g></svg>

React

import type { SVGProps } from "react";

export function AgentLoadersThinkingBubble(props: SVGProps<SVGSVGElement>) {
  return (
    <svg {...props} xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 24 24"><g fill="none" stroke="currentColor" strokeWidth="1.5" strokeLinecap="round" strokeLinejoin="round"><path d="M7.9 20A9 9 0 1 0 4 16.1L3 21z"/><circle cx="8.5" cy="11.5" r="1.1" fill="currentColor" stroke="none"><animate attributeName="opacity" values=".2;1;.2" dur="1.2s" begin="0s" repeatCount="indefinite"/></circle><circle cx="12" cy="11.5" r="1.1" fill="currentColor" stroke="none"><animate attributeName="opacity" values=".2;1;.2" dur="1.2s" begin="0.2s" repeatCount="indefinite"/></circle><circle cx="15.5" cy="11.5" r="1.1" fill="currentColor" stroke="none"><animate attributeName="opacity" values=".2;1;.2" dur="1.2s" begin="0.4s" repeatCount="indefinite"/></circle></g></svg>
  );
}

Vue

<template>
  <svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 24 24"><g fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M7.9 20A9 9 0 1 0 4 16.1L3 21z"/><circle cx="8.5" cy="11.5" r="1.1" fill="currentColor" stroke="none"><animate attributeName="opacity" values=".2;1;.2" dur="1.2s" begin="0s" repeatCount="indefinite"/></circle><circle cx="12" cy="11.5" r="1.1" fill="currentColor" stroke="none"><animate attributeName="opacity" values=".2;1;.2" dur="1.2s" begin="0.2s" repeatCount="indefinite"/></circle><circle cx="15.5" cy="11.5" r="1.1" fill="currentColor" stroke="none"><animate attributeName="opacity" values=".2;1;.2" dur="1.2s" begin="0.4s" repeatCount="indefinite"/></circle></g></svg>
</template>

CSS

.icon-thinking-bubble {
  width: 24px;
  height: 24px;
  background-color: currentColor;
  -webkit-mask: url("data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%221em%22%20height%3D%221em%22%20viewBox%3D%220%200%2024%2024%22%3E%3Cg%20fill%3D%22none%22%20stroke%3D%22currentColor%22%20stroke-width%3D%221.5%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%3E%3Cpath%20d%3D%22M7.9%2020A9%209%200%201%200%204%2016.1L3%2021z%22%2F%3E%3Ccircle%20cx%3D%228.5%22%20cy%3D%2211.5%22%20r%3D%221.1%22%20fill%3D%22currentColor%22%20stroke%3D%22none%22%20opacity%3D%221%22%3E%3C%2Fcircle%3E%3Ccircle%20cx%3D%2212%22%20cy%3D%2211.5%22%20r%3D%221.1%22%20fill%3D%22currentColor%22%20stroke%3D%22none%22%20opacity%3D%221%22%3E%3C%2Fcircle%3E%3Ccircle%20cx%3D%2215.5%22%20cy%3D%2211.5%22%20r%3D%221.1%22%20fill%3D%22currentColor%22%20stroke%3D%22none%22%20opacity%3D%221%22%3E%3C%2Fcircle%3E%3C%2Fg%3E%3C%2Fsvg%3E") no-repeat center / contain;
  mask: url("data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%221em%22%20height%3D%221em%22%20viewBox%3D%220%200%2024%2024%22%3E%3Cg%20fill%3D%22none%22%20stroke%3D%22currentColor%22%20stroke-width%3D%221.5%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%3E%3Cpath%20d%3D%22M7.9%2020A9%209%200%201%200%204%2016.1L3%2021z%22%2F%3E%3Ccircle%20cx%3D%228.5%22%20cy%3D%2211.5%22%20r%3D%221.1%22%20fill%3D%22currentColor%22%20stroke%3D%22none%22%20opacity%3D%221%22%3E%3C%2Fcircle%3E%3Ccircle%20cx%3D%2212%22%20cy%3D%2211.5%22%20r%3D%221.1%22%20fill%3D%22currentColor%22%20stroke%3D%22none%22%20opacity%3D%221%22%3E%3C%2Fcircle%3E%3Ccircle%20cx%3D%2215.5%22%20cy%3D%2211.5%22%20r%3D%221.1%22%20fill%3D%22currentColor%22%20stroke%3D%22none%22%20opacity%3D%221%22%3E%3C%2Fcircle%3E%3C%2Fg%3E%3C%2Fsvg%3E") no-repeat center / contain;
}

This icon is animated. Browsers do not run SVG animation inside a CSS mask, so the rule above uses a still of the drawn icon. Inline the SVG (or use the React/Vue/Svelte snippet) to keep the animation.