JavaScript tips organized_javascript tips

This article summarizes JavaScript tips. Share it with everyone for your reference, the details are as follows:

1. Organize default events

Prevent the default event. The default input type='date' of h5 has no effect on some browsers and android devices. In this case, the time selector of h5+ must be called, but the default click event of the input must be organized. The code is as follows:

//选择时间
$("#end_time").on("click",function(event){
  event.preventDefault();
  plus.nativeUI.pickDate( function(e){
   var d = e.date;
//   console.log(d.Format('yyyy-MM-dd'));
   $("#end_time").val(d.Format('yyyy-MM-dd'));
  },function(e){
   console.log( "未选择日期："+e.message );
  },{title:"请选择到期时间",minDate:new Date()}); 
});

2. Determine whether input type='checkbox' is selected, the code is as follows

if (!$("#shopregister #checkaggree").is(":checked")) {
  alert("请同意注册协议");
  return false;
}

3. Get the value of the selected one among multiple checkboxes, the code is as follows

<input name='is_refund' id='refund_1' type='radio' value='1' />
<input name='is_refund' id='refund_0' checked='checked' type='radio' value='0' />
$("#shopregister input[name='is_refund']:checked").val();

4.Set checkbox selected

Copy code The code is as follows:

$("[name='checkbox']:even").attr(" checked",'true'); //If this doesn't work, please use prop

5. Get the value of the title attribute in multiple pictures

user.id_pic1 = $($("#shopregister .id_pic")[0]).attr("title");
user.id_pic2 = $($("#shopregister .id_pic")[1]).attr("title");
user.id_pic3 = $($("#shopregister .id_pic")[2]).attr("title");

6. Display progress pictures during ajax submission

$.ajax({
  type: 'POST',
  url: configManager.RequstUrl + "/api/user/createstore",
  data: postdata,
  beforeSend:function(){ $("#waitingupload").removeClass("heisebghid").addClass("heisebg");}
}).done(function (data) {
  $("#waitingupload").removeClass("heisebg").addClass("heisebghid");
  if ("success" == data.state) {
   //服务端成功
  }
  else {
   //服务端失败
  }
}).fail(function () {
  //ajax请求失败
});

I hope this article will be helpful to everyone in JavaScript programming.