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carine todmia
6,071 Pointsusing the $ to label variables
Hi I am following the simple image gallery tutorial and in it the instructor labeled his variable starting with a $. when i did this my code did not work. when i took it out it worked. Can someone explain this discrepency. honestly from what i recall from javascript basics you cant do this anyways.
3 Answers
carine todmia
6,071 Pointshey guys thanks for the help looks like there was just a small error in the code that i wasnt catching.
Robert Richey
Courses Plus Student 16,352 PointsHi Carine,
Can you please post all of your JavaScript code? There should not be a problem with prefixing variables with a $ in JavaScript - I do it all the time, for the same reason Andrew mentions - it's convention to convey that it holds a jQuery object.
mikes02
Courses Plus Student 16,968 PointsJust to elaborate on what Robert said with an example, I tend to find it useful to use $ on variables when it represents a DOM object. For example, a text input:
var $name = $('#name');
However, let's say we also wanted a variable that had the value of name:
var nameValue = $name.val();
or, assuming you didn't already have $name defined:
var nameValue = $('#email').val();
Where nameValue is referring to the actual value of the input, and not the input element itself.