如何在不清空HTMLCollection的情况下将其转换为数组? [英] How do I convert a HTMLCollection into an array, without emptying it?

问题描述

我正在尝试将4个div的HTMLCollection转换为数组，但是我尝试的每种方法似乎都会导致清空该数组.

I am trying to convert an HTMLCollection of 4 divs into an array, but every method I try seems to result in the array being emptied.

<div class="container">
        <div class="shape" id="one"></div>
        <div class="shape" id="two"></div>
        <div class="shape" id="three"></div>
        <div class="shape" id="four"></div>
</div>

我尝试过的方法-按照 this上一个问题:

Methods I've attempted - as per this previous question:

var shapesHC = document.getElementsByClassName('shape');
//gives HTMLCollection

var shapesArrCall = [].slice.call(shapesHC);
// returns empty array

var shapesArrHC = Array.from(shapesHC);
// returns empty array

var shapesArrHCSpread = [...shapesHC];
// returns empty array

如果有人能指出我在哪里出问题，我将非常感激.

I'd really appreciate if anyone can point out where I'm going wrong here.

谢谢.

推荐答案

尝试使用此功能:

setTimeout(() => {
    this.convertToArray();
});

convertToArray() {
    const shapesHC = document.getElementsByClassName('shape');
    const shapesArrHCSpread = [...(shapesHC as any)];
    console.log(shapesArrHCSpread);
}

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