javascript - .val assign to variable on submit of form -


How can I perform this variable counting function when a user hits the submit button? 

  Var size = $ ("# size"). Val (); & Lt; Input id = "size" /> & Lt; Button type = "submit" & gt; Calculation! & Lt; / Button & gt;

They should be assumed to be input and store it in variable = size

Is it possible that the user reloaded without reloading this page Output it back without JQuery? P>

Attach an event handler to submit form event

Original example

HTML

prevent event handler from sending form to preventDefault () Should call for.

/ P> 
  & lt; Forms & gt; & Lt; Input id = "size" /> & Lt; Button type = "submit" & gt; Calculation! & Lt; / Button & gt; & Lt; / Form & gt; & Lt; Div id = "output" & gt; & Lt; / Div & gt;

JavaScript 

  var size; $ ("Form") Submit (function (e) {e.preventDefault (); // size = $ ("# size") prevents submitting. Val (); $ ("# output"). Text (size);}) ;   
  JS Friedl:   
 
 Use of Bedle Code  
  Javascript   
  $ ("#cushionCalculator"). Submit (function (e) {e.preventDefault (); var size = $ ("# size"). Val (); $ ("# output"). });  
 
  Fiddle will use your code:


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