js工具方法

滚动距离

window.onscroll = function() {        var t = document.documentElement.scrollTop || document.body.scrollTop;        if(t <= 120) {            $(".index-bar").css("display", "none");        } else {            $(".index-bar").css("display", "inline-block");        }    }

获取索引 记住加e 监听

for(var i = 0; i < btnList.length; i++) {        btnList[i].index = i;        btnList[i].addEventListener('tap', function(e) {            var index = this.inedex;        })

防止input导致UI向上位移

document.querySelector(".main-bar ").style.top = (plus.display.resolutionHeight - 50) + "px";

底部选项卡颜色

.mui-bar-tab .mui-tab-item.mui-active {            color: #b0a464;        }

css居中

position: fixed;left: 50%;top: 50%;-webkit-transform:translate(-50%,-50%);-moz-transform:translate(-50%,-50%);-o-transform:translate(-50%,-50%);-ms-transform:translate(-50%,-50%);transform:translate(-50%,-50%);