@schema-render/core-react/dist/esm/utils/dom.js

Through a set of simple JSON Schema, efficiently build a set of forms.

/**
 * 计算「指定元素」到指定的「定位的祖先元素」的距离
 * https://developer.mozilla.org/zh-CN/docs/Web/API/HTMLElement/offsetParent
 * @param child 子元素
 * @param ancestor 祖先元素
 */ export function positionedOffset(child, ancestor) {
    if (!child || !ancestor) {
        return {
            left: 0,
            top: 0
        };
    }
    let left = 0;
    let top = 0;
    let current = child;
    while(current){
        if (current === ancestor) {
            break;
        }
        left += current.offsetLeft;
        top += current.offsetTop;
        current = current.offsetParent;
    }
    return {
        left,
        top
    };
}