javascript - 如何自动检测 DOM 中的元素以填充 const 数组？

Question

我编写了一个几乎可以独立运行的脚本，但问题是，如果我向页面添加另一个模式，我需要进入我的脚本添加一个条目才能被它识别。我想知道是否有一种方法可以让脚本自动检测页面上的模态数量，并在我的 const 中自动为它们分配适当的值，然后按照脚本的指示在它们上运行该函数。这是我的代码。

// Staff Modal Element Arrays
const modalClose =  document.querySelectorAll('.modal-close');
const modalButton = document.querySelectorAll('.staff-modal-button p')
const modalMain = document.querySelectorAll('.staff-modal')

// Staff Modal Combined Definition Array
const staffModal =  {one: {button: modalButton[0], modal: modalMain[0] , close: modalClose[0]},
                    two: {button: modalButton[1], modal: modalMain[1], close: modalClose[1]},
                    three: {button: modalButton[2], modal: modalMain[2], close: modalClose[2]},
                    four: {button: modalButton[3], modal: modalMain[3], close: modalClose[3]},
                    five: {button: modalButton[4], modal: modalMain[4], close: modalClose[4]},
                    six: {button: modalButton[5], modal: modalMain[5], close: modalClose[5]},
                    seven: {button: modalButton[6], modal: modalMain[6], close: modalClose[6]}}

// Function to Define Modal Actions

function modalFunction(staffNumber) {
    const modalOpen = staffNumber.button;
    const modal = staffNumber.modal;
    const modalExit = staffNumber.close;
    modalOpen.addEventListener('click', function() {
        modal.style.display='flex';
    })
    modalExit.addEventListener('click', function() {
        modal.style.display='none';
    })
    modal.addEventListener('click', function(e) {
        if (e.target == modal) {
            modal.style.display='none'
        }
    })
}

// Calling Functions for Each Staff Modal in Array

for (i in staffModal) {
    modalFunction(staffModal[i]);
}

Answer 1

您已经使用 document.querySelectorAll('.staff-modal') 选择了所有模式。无需手动编写 staffModal 对象，只需迭代您选择的所有内容即可:

for (let i = 0; i < modalMain.length; i++) {
    modalFunction({button: modalButton[i], modal: modalMain[i] , close: modalClose[i]});
}

此外，我不会从所有模态中选择所有元素并假设它们的顺序相同。我不确定是否确实存在一些奇怪的情况，但最好只选择父模态和随后的子模态。像这样:

const modalMain = document.querySelectorAll('.staff-modal');

function modalFunction(modal) {
    const modalOpen = modal.querySelector('.staff-modal-button p');
    const modalExit = modal.querySelector('.modal-close');
    modalOpen.addEventListener('click', function() {
        modal.style.display='flex';
    })
    modalExit.addEventListener('click', function() {
        modal.style.display='none';
    })
    modal.addEventListener('click', function(e) {
        if (e.target == modal) {
            modal.style.display='none'
        }
    })
}

for (let i = 0; i < modalMain.length; i++) {
    modalFunction(modalMain[i]);
}