下面分享一個js 彈出窗, 分 toast , dialog , load 三種彈窗 , 下面用js css 來實現以下：

• 首先是js程式碼 | 採用了 es6 的寫法

//公共彈窗載入動畫

const   DIALOG_TOAST = '1',
        DIALOG_DIALOG = '2',
        DIALOG_LOAD = '3',

class Dialog {

    constructor(type = DIALOG_DIALOG,
                dialogContent = '請求失敗',
                wrapClassName = 'common-dialog-wrap'
 
,
                dialogWrapClassName = 'common-dialog-content-wrap',
                contentClassName = 'common-dialog-content',
                btnClassName = 'common-btn',
                btnContent = '確定') {


        this.type = type;

        //吐司
        if (type == DIALOG_TOAST) {
            this
 
.dialog = document.createElement('div');
            this.dialog.className = 'common-toast';
            this.dialog.innerHTML = dialogContent;

        }
        //載入動畫
        else if (type == DIALOG_LOAD) {
            this.dialog = document.createElement('div');
            this.dialog.className = wrapClassName;
            this
 
.figure = document.createElement('figure');
            this.figure.className = 'common-loadGif';
            this.img = document.createElement('img');
            this.img.src = getAbsolutePath() + '/fenqihui/static/bitmap/travel/loadgif.gif';
            this.figure.appendChild(this.img);
            this.dialog.appendChild(this.figure);

        } else if (type == DIALOG_DIALOG) {
            this.dialog = document.createElement('div');
            this.dialog.className = wrapClassName;
            this.dialogWrap = document.createElement('div');
            this.dialogWrap.className = dialogWrapClassName;
            this.conetent = document.createElement('p');
            this.conetent.innerHTML = dialogContent;
            this.conetent.className = contentClassName;
            this.confirmButton = document.createElement('p');
            this.confirmButton.innerHTML = btnContent;
            this.confirmButton.className = btnClassName;
            this.dialogWrap.appendChild(this.conetent);
            this.dialogWrap.appendChild(this.confirmButton);
            this.dialog.appendChild(this.dialogWrap);
            this.bindEvent();
        }


    }


    bindEvent() {
        this.confirmButton.addEventListener('click', ()=> {
            this.hide();
        })
    }

    show(time) {
        document.querySelector('body').appendChild(this.dialog);
        $(this.dialog).css('display', 'block');

        if (this.type == DIALOG_TOAST) {

            setTimeout(()=> {
                $(this.dialog).css('display', 'none');
            }, time);
        }

    }

    hide() {
        $(this.dialog).css('display', 'none');
    }

}

css 檔案如下：

/*公共彈窗*/
.common-dialog-wrap {
    position: fixed;
    background: rgba(0,0,0,.7);
    z-index: 100;
    height: 100%;
    width: 100%;
    top: 0;
}

.common-dialog-content {
    height: 2rem;
    border-bottom: 1px solid #ccc7c7;
    line-height: 2rem;
    text-align: center;
    font-size: .65rem;
}

.common-btn {
    text-align: center;
    height: 2rem;
    color: orange;
    line-height: 2rem;
}

.common-dialog-content-wrap{
    background: #fff;
    width: 10rem;
    height: 4rem;
    border-radius: 5px;
    position: fixed;
    left: 0;
    top:0;
    right: 0;
    bottom: 0;
    margin: auto;
}

/*吐司樣式*/
.common-toast{
    height: 1.6rem;
    width: 4rem;
    box-sizing: content-box;
    color: #fff;
    padding: 0 10px;
    position: fixed;
    left: 0;
    top:0;
    bottom: 0;
    right: 0;
    text-align: center;
    line-height: 1.6rem;
    margin: auto;
    background: rgba(0,0,0,.7);
    border-radius: 2rem;
}

.common-loadGif{
    height: 4rem;
    width: 4rem;
    position: fixed;
    top:0;
    left: 0;
    bottom: 0;
    right: 0;
    margin: auto;
}

.common-loadGif img{
    height: 100%;
    width: 100%;
    border-radius: 10px;
}

使用方式

new Dialog(DIALOG_DIALOG).show()   | hide()
new Dialog(DIALOG_LOAD).show()   | hide()
new Dialog(DIALOG_TOAST).show(time : number)   | hide()

效果如下