[Bug]: getZoom is undefined

[rmd1710714107]

Describe the bug / 问题描述

初始化图实例后立即调用getZoom函数报错：
Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'getZoom')

Reproduction link / 复现链接

No response

Steps to Reproduce the Bug or Issue / 重现步骤

let graph = new Graph({       
     ...
});
console.log(graph.getZoom());

G6 Version / G6 版本

🆕 5.x

OS / 操作系统

• macOS
• Windows
• Linux
• Others / 其他

Browser / 浏览器

• Chrome
• Edge
• Firefox
• Safari (Limited support / 有限支持)
• IE (Nonsupport / 不支持)
• Others / 其他

[yvonneyx]

render 为异步操作，先 await 再调用 getZoom()