分享js插件

(function() {
    // 插件代码
})();

document.addEventListener('click', function(event) {
    if (event.target.matches('.plugin-element')) {
        // 处理事件
    }
});

if (!Array.prototype.includes) {
    Array.prototype.includes = function(searchElement) {
        // Polyfill代码
    };
}

(function() {
    class Modal {
        constructor(options) {
            this.options = Object.assign({
                title: 'Modal Title',
                content: 'Modal Content'
            }, options);
            this.init();
        }

        init() {
            const modal = document.createElement('div');
            modal.className = 'modal';
            modal.innerHTML = `
                <div class="modal-content">
                    <span class="close-button">&times;</span>
                    <h2>${this.options.title}</h2>
                    <p>${this.options.content}</p>
                </div>
            `;
            document.body.appendChild(modal);

            const closeButton = modal.querySelector('.close-button');
            closeButton.addEventListener('click', () => this.close(modal));
        }

        close(modal) {
            document.body.removeChild(modal);
        }
    }

    window.Modal = Modal;
})();

// 使用插件
const myModal = new Modal({
    title: 'Hello World',
    content: 'This is a custom modal.'
});