CODEWITHSUNDEEP
javascriptjquery
user2766267
user2766267

Reputation: 57

How to avoid user from entering empty string in ajax post

I have a jquery ajax post and when a user wirte and press enter in a messagebox this ajax triggers. but when the user writes Nothing and press enter this ajax is triggered and return something. but how can I catch the empty strings from user? 

cliKeyPressed : function(e) {

        if(typeof e === "undefined" ) e = window.event;
        if(e.keyCode == 13) {
          var previousLine = "";
          if($('#terminal').text()!== ""){
            previousLine = $('#terminal').text();
            previousLine = previousLine.replace("you entered: ", " ");
          }
          var inputData = $(e.currentTarget).val();

          $('#terminal').text(previousLine + "\r\n" + inputData + "\r\n");
                    AjaxPost(inputData);

        }

AjaxPost : function(data) {

      $.ajax({
       type : "POST",
       url : "/api/user",
       datatype : "application/json",
       contentType: " text/plain",
       data : dataAttribute,
       success : function(data) {

       },
       error : function(error) {

       },

Upvotes: 0

Views: 103

Answers (1)

Krasimir
Krasimir

Reputation: 13529

You are already doing it. Just move the calling of the AjaxPost inside the if statement:

if(typeof e === "undefined" ) e = window.event;
    if(e.keyCode == 13) {
        var previousLine = "";
        if($('#terminal').text() !== "" && $(e.currentTarget).val() !== ""){
            previousLine = $('#terminal').text();
            previousLine = previousLine.replace("you entered: ", " ");
            var inputData = $(e.currentTarget).val();
            $('#terminal').text(previousLine + "\r\n" + inputData + "\r\n");
            AjaxPost(inputData);
        }
    }
}

Upvotes: 3

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