textarea删除时光标会跳到最后

<textarea maxlength=’-1’ bindinput=‘change’ bindlinechange=‘lineheight’ disabled=’{{disabled}}’ bindtap=‘check’ value=’{{article}}’ space=‘emsp’ cursor-spacing=‘40’ style=’{{textHeight}}’ bindblur=’’></textarea>

change: function (e) {

this.data.otherValue = e.detail.value

}