对于居中

tab 点击元素居中(小程序)

// 获取客设施宽度const clientWidth = dd.getSystemInfoSync().windowWidth / 2;// 获取节点联合const nodes = dd.createSelectorQuery().selectAll( '.tabs .item' );handleTap(){    const { index } = e.target.dataset;    const { offsetLeft } = e.currentTarget;    const PADDING = 96; // 盒子默认边距    nodes.boundingClientRect().exec( rect => {      const { width } = rect[0][ index ];      const scrollLeft = offsetLeft - this.clientWidth / 2 + ( width / 2 ) - PADDING      this.setData({ scrollLeft })   });}