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I am using jsPdf. When a field has been left blank "undefined" is printed on the pdf. I would like to replace that with a empty string. I am trying to use a if statement but I am not getting it.

 doc.text(30, 190, "Budget : $");
    if ($scope.currentItem.JobOriginalBudget == "undefined") {

        doc.text(50, 190, " ");
    }
    else {
        var y = '' + $scope.currentItem.JobOriginalBudget;
        doc.text(50, 190, y);
    };

undefined is a primitive value. Instead of comparing against the identifier undefined, you're comparing against the 9-character string "undefined".

Simply remove the quotes:

if ($scope.currentItem.JobOriginalBudget == undefined)

Or compare against the typeof result, which is a string:

if (typeof $scope.currentItem.JobOriginalBudget == "undefined")

function for replacing undefined or null with empty string � GitHub, un(). // function for replacing undefined or null with empty string. // does not replace NaN, 0, or false. function un(o) {. return o != null ? o : '';. } (function untest() {. I am using jsPdf. When a field has been left blank “undefined” is printed on the pdf. I would like to replace that with a empty string. I am trying to use a if statement but I am not getting it.

As per this answer I believe what you want is

doc.text(50, 190, $scope.currentItem.JobOriginalBudget || " ")

How to Replace a value if null or undefined in JavaScript , We can set a default value if a value is undefined. This can In this method, if the value is null or undefined, then it will simply replaced by default value set by user. Example: How to globally replace a forward slash in a JavaScript string ? To check if a string is null or empty or undefined use the following code snippet if(!emptyString){ // String is empty }

simply remove the "== 'undefined'"

if (!$scope.currentItem.JobOriginalBudget) {
    doc.text(50, 190, " ");
}

How to check empty/undefined/null string in JavaScript , If we want to check any string either it is filled or empty we can use Javascript for such purpose for example : form validation. Example : filter_none. edit close. The replace() method searches a string for a specified value, or a regular expression, and returns a new string where the specified values are replaced. Note: If you are replacing a value (and not a regular expression), only the first instance of the value will be replaced. To replace all occurrences of a specified value, use the global (g

var ab = {
firstName : undefined,
lastName : undefined
}

let newJSON = JSON.stringify(ab, function (key, value) {return (value === undefined) ? "" : value});

console.log(JSON.parse(newJSON))
<p>
   <b>Before:</b>
   let ab = {
   firstName : undefined,
   lastName : "undefined"
   }
   <br/><br/>
   <b>After:</b>
   View Console
</p>

7 Tips to Handle undefined in JavaScript, In programming, truthiness or falsiness is that quality of those boolean expressions which don't resolve to an actual boolean value, but which nevertheless get� Checks null and undefined values and returns an empty string. share | improve this answer If you can replace null-s with empty strings on serialized string, do

If item is an Object use, this function :

replaceUndefinied(item) {
   var str =  JSON.stringify(item, function (key, value) {return (value === undefined) ? "" : value});
   return JSON.parse(str);
}

Falsy values vs null, undefined, or empty string, First, always use === instead of == in Javascript. You can read more about that Note that value == null is shorthand for value === null || value === undefined . I want to replace all missing strings in a table with a string of my choice, say 'unknown'. I use R2016a (without an upgrade option), so functions like fillmissing are not available to me, in case they could be of help.

String.IsNullOrEmpty in JavaScript, A common task when validating data is ensuring that a variable, meant to be a string, has a valid value. In the context of a form being filled out,� OP was asking for "how to check for an empty string", un undefined variable is not an empty string. Anyway you could check typeof variable != "undefined" before checking if is empty. – Abimael Martell Apr 1 '14 at 18:56

How To Check for an Undefined/Null/Empty String, I would like to replace that with a empty string. I am trying to use a if statement but I am not getting it. Falsy values vs null, undefined, or empty string,� Replace(String, String, Boolean, CultureInfo) Returns a new string in which all occurrences of a specified string in the current instance are replaced with another specified string, using the provided culture and case sensitivity.

Is there a standard function to check for null, undefined, or blank , JSON.stringify will omit all object attributes that are undefined . This allows us to replace any value, in our case undefined . const replacer = (key, value) => typeof value === 'undefined' ? null : value; const stringified = JSON.stringify(user, � Hi, I am running Datatables on a SharePoint 2013 doc library and if a field is empty for a specific item, Datatables displays the value as "undefined". Can someone please tell me how to replace "undefined" with a "tba" string or blank value or whatever? I have looked everywhere but cannot find the answer. Thanks.

Comments
  • Just do var value = $scope.currentItem.JobOriginalBudget || " "; doc.text(50, 190, value+'') Check for falsy value which could be undefined, "", null, NaN, false, 0 etc.. Or use angular.isUndefined($scope.currentItem.JobOriginalBudget) for specific check, or even angular.isDefined for the opposite of previous
  • or expanding on what @PSL shows, create a simple helper function since a PDF likely has numerous of these to do and can write getVal(var) a lot easier than lots of comparisons
  • var y = '' + ($scope.currentItem.JobOriginalBudget || '');