increment - Difference between ++ and +=1 in javascript -

Can someone explain why the following functions give different results? First does not seem to work, but the second makes me wonder because I thought that + = 1 and ++ did the same thing

(I really intend to use this code I'm not, it's just for displaying the difference).

  / * function 1 * / function incrementIfZero1 (base, element) {If (element == 0) {return base ++; } And {return base; }}; / * Function 2 * / Function increment IFZero2 (base, element) {if (element == 0) {return base + = 1; } And {return base; }}; Increment IFZero1 (1,0) / * - & gt; 1 * / Salary increment Eiffel 2 (1,0) / * - & gt;  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Thanks  
 / P> 
 Thank you for your reply, it is understandable now I have also tried the following statement, which resulted in 1:  
  return (base ++)   
 Now I wonder if this function 2 Does not give the same result - I expected that brackets should evaluate 'force' before returning. Why not think of any such thing?   
 
 
 When you send  back to base ++  before it grows The value of the base comes back.    ++  As is the case with  +, increments increase first  
 = 1   
 In response to your edit, I tried to wrap random statements in parentheses and most mathematical operators responded as expected, this increase is being free, because possibly the syntax of the pre-variance versus Post-incrementality is highly deliberate and only in the statement   returns Neither   is a specific value or does not you wrap it in brackets