Benefits of declaring variable type through assignment in JavaScript -

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in javascript, there benefit in assigning temporary value newly declared variable? example...

var = 0,     b = '';  // somewhere else = 5; b = 'goodbye';

vs

var a, b;  // somewhere else     = 5; b = 'goodbye';

i'm aware assigning variable on declaration set type. in javascript, can changed assigning value of different type, doesn't protect in way.

what advantages/disadvantages of above?

i believe advantage is: order in code. you'll know right beginning of code type var.

the disadvantage more code lines , size of file.


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