How to use JavaScript singleton mode to realize custom pop-up box

This article mainly shows you "how to use JavaScript singleton mode to achieve custom pop-up box", the content is easy to understand, clear, hope to help you solve your doubts, the following let Xiaobian lead you to study and learn "how to use JavaScript singleton mode to achieve custom pop-up box" this article.

Function

Custom pop-up box title

Custom pop-up box content

Callback function when custom pop-up box is confirmed and closed

Complete code 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.le [XSS _ clean] = null const top = document.createElement ('div') top.className =' top' const topic = document.createElement ('span') topic.className =' topic' topic [XSS _ clean] = topicText const close = document.createElement ('span') close.className =' close' close [XSS _ clean] ='× 'top.appendChild (topic) top.appendChild (close) const middle = document.createElement ('div') middle.className =' middle' const content = document.createElement ('div') content.className =' content' content [XSS _ clean] = text middle.appendChild (content) const bottom = document.createElement ('div') bottom.className =' bottom' const confirm = document.createElement ('button') confirm.className =' confirm' account [XSS _ clean] = confirmText Const cancel = document.createElement ('button') cancel.className =' cancel' cancel [XSS _ clean] = 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: 'prompt text', topicText: 'title', confirmText:'OK', cancelText: 'cancel'}, res = > {console.log (res)})

Effect picture

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