https://developers.elementor.com/docs/getting-started/first-addon/
代码在上面网址，或点这里： https://codecopy.cn/post/8fbnzh
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渲染方式：
https://developers.elementor.com/docs/widgets/widget-rendering/
Elementor has two rendering methods, both rely on the returned values from the control,
but each method renders differently as one uses PHP and the other uses JS.
render() – Written as a PHP template that generates the frontend output.
content_template() – Written as a JS template that generates the preview output in the editor.
render函数是前台用,用 php
content_template 是后台用。用js
联系：DM企业建站系统
网址： www.demososo.com
