微信小程序-text

WXML

<view>  <text>{{text}}</text>  <button type='primary' bindtap='add'>add line</button>  <button type='primary' bindtap='remove'>remove line</button></view>

JS

var initData = 'this is first line\nthis is second line'var extraLine = [];Page({  /**   * 页面的初始数据   */  data: {    text:initData  },  add:function(e){    extraLine.push('other line')    //push:添加一个元素      this.setData({        text:initData +'\n' +extraLine.join('\n')        //join:在每个元素后面加"\n"      })  },  remove:function(e){    extraLine.pop()    //pop:删除最后的元素    this.setData({      text:initData +'\n' + extraLine.join('\n')    })  })

效果图: