前端vue中需要格式化时间字符串‘2021-03-18 19:29:47’为‘2021-03-18’。

页面元素

<el-col class="publishdate">{{shijiantime(item.lastTime)}} 发布</el-col>

 js

shijiantime: function (times){
              var timearr = times.replace(" ", ":").replace(/\:/g, "-").split("-");
              var timestr = ""+timearr[0]+"/" + timearr[1] + "/" + timearr[2]
              //var timestr = "" + timearr[1].split("")[1] + "月" + timearr[2] + "日\t" + timearr[3] + ":" + timearr[4] + ""
              return timestr
            }

 报错：error Unnecessary escape character: \- no-useless-escape

问题原因：

禁用不必要的转义字符; \-

解决：把“\”去掉

shijiantime: function (times){
              var timearr = times.replace(" ", ":").replace(/:/g, "-").split("-");
              var timestr = ""+timearr[0]+"/" + timearr[1] + "/" + timearr[2]
              //var timestr = "" + timearr[1].split("")[1] + "月" + timearr[2] + "日\t" + timearr[3] + ":" + timearr[4] + ""
              return timestr
            }