JavaScript单例模式实现自定义弹框
本文实例为大家分享了JavaScript单例模式实现自定义弹框的具体代码,供大家参考,具体内容如下
功能
- 自定义弹框标题
- 自定义弹框内容
- 自定义弹框确认和关闭时的回调函数
完整代码
const Dialog = (function () { class Dialog { constructor () { this.ele = document.createElement('div') this.ele.className = 'dialog' document.body.appendChild(this.ele) this.callback = null this.setEvent() } setContent ({ text, topicText, confirmText, cancelText } = options) { this.ele.innerHTML = null const top = document.createElement('div') top.className = 'top' const topic = document.createElement('span') topic.className = 'topic' topic.innerHTML = topicText const close = document.createElement('span') close.className = 'close' close.innerHTML = '×' top.appendChild(topic) top.appendChild(close) const middle = document.createElement('div') middle.className = 'middle' const content = document.createElement('div') content.className = 'content' content.innerHTML = text middle.appendChild(content) const bottom = document.createElement('div') bottom.className = 'bottom' const confirm = document.createElement('button') confirm.className = 'confirm' confirm.innerHTML = confirmText const cancel = document.createElement('button') cancel.className = 'cancel' cancel.innerHTML = cancelText bottom.appendChild(confirm) bottom.appendChild(cancel) const wrap = document.createElement('div') this.ele.appendChild(top) this.ele.appendChild(middle) this.ele.appendChild(bottom) this.ele.style.display = 'block' } setEvent () { this.ele.addEventListener('click', e => { e = e || window.event const target = e.target || e.srcElement if (target.className === 'close') { this.ele.style.display = 'none' console.log('close') } if (target.className === 'confirm') { this.ele.style.display = 'none' this.callback(true) } if (target.className === 'cancel') { this.ele.style.display = 'none' this.callback(false) } }) } } let instance = null return function (options, cb) { if (!instance) instance = new Dialog() instance.setContent(options) instance.callback = cb || function () {} return instance } })() const dialog = new Dialog({ text: '提示文字', topicText: '标题', confirmText: '确定', cancelText: '取消' }, res => { console.log(res) })
效果图
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