Problem statement: how to return a modified parameter value while returning its modified status in javascript function
sample code:
var inputHtml = 'hello';
if(IsContentChanged(inputHtml))
alert(inputHtml);
else
alert('No content changed');
function IsContentChanged(inputHtml)
{
if($.trim(inputHtml))
{
inputHtml = 'new text';
return true;
}
else
return false;
}
From MDN JavaScript reference:
All types except objects define immutable values. Specifically, strings are immutable.
So you have to return an updated string, no in-place edit is permitted.
checkout this link..
You can pass object by reference and can use this methodology for your requirement.
Do this:
var inputHtml = {text:'hello'};
if(IsContentChanged(inputHtml))
alert(inputHtml.text);
else
alert('No content changed');
function IsContentChanged(inputHtml)
{
if($.trim(inputHtml.text))
{
inputHtml.text = 'new text';
return true;
}
else
return false;
}
