Javascript element.replaceChildren() 函数是否适用于重复值，或者是什么阻止了它的工作

目前，我正在try 用数组中相同的值替换子元素

const e = document.createElement("div");
e.className = "e";
e.innerHtml = "test ";
const a = [e, e, e];
// test is appearing only once instead of multiple times
document.body.replaceChildren(...a);

我的代码是:

    class MockElement {
        constructor(className, children = []) {
            this.element = document.createElement("div");
            this.className = className;
            this.children = children;
            this.element.className = className;
            console.log(Array(children))
            if (children) this.element.replaceChildren(...Array(children));
        };
        replaceChildren(c) {
            this.children = c;
            this.element.replaceChildren(...c);
        };
    };

    //const wrapper = document.getElementById("centirdle-boards");



    const fill = (c, t) => {
        // init new array
        let a = new Array();
        // loop through {t} times, adds new copy of {c} to the array each time
        for (let j = 0; j < t; j++) a.push( c );
        return a;
    };

    const h = new MockElement("h");
    // only seeing one of them
    document.body.replaceChildren(...fill(h.element, 5))

目前，fill功能运行良好，符合预期