May 2008
Intermediate to advanced
172 pages
4h 54m
English
Content preview from JavaScript: The Good PartsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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var Statement
JavaScript allows var definitions to occur
anywhere within a function. JSLint is stricter.
JSLint expects that:
A
varwill be declared only once, and that it will be declared before it is used.A function will be declared before it is used.
Parameters will not also be declared as
vars.
JSLint does not expect:
The
argumentsarray to be declared as avar.That a variable will be declared in a block. This is because JavaScript blocks do not have block scope. This can have unexpected consequences, so define all variables at the top of the function body.
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