JavaScript syntax: Difference between revisions

Revision as of 00:12, 24 January 2006

Revision as of 00:32, 24 January 2006

Line 183:

==Control structures==

===If ... else===

if (conditionexpr) {

statements;

} else if (expr) {

statements;

} else {

statements;

}

*<code>else</code> statements must be cuddled (i.e. "<code>} else {</code>" , all on the same line), or else some browsers may not parse them correctly.

===[[Control_flow#Choice_based_on_specific_constant_values|Switch statement]]===

switch (expressionexpr) {

case label1 VALUE:

statements;

break;

case label2 VALUE:

statements;

break;

default :

statements;

break;

}

Actually, *<code>break;</code> is optional.; However leavinghowever, it out isn'ts recommended to use it in most cases, since otherwise code execution will continue to the body of the next <code>case &hellip; :</code> block.

*Add a break statement to the end of the last case as a precautionary measure, in case additional cases are added later.

*Strings can be used for the case values.

*Braces are required.

===[[For loop]]===

for ([initial-expression]expr; [condition]cond-expr; [incrementincr-expression]expr) {

statements;

}

===For ... in loop===

for (slotvar property-name in object-name) {

This loop goes through all enumerable properties of an object (or elements of an array).

statements involvingusing object-name[slotproperty-name];

for (slot in object) {

statements involving object[slot]

}

This loop goes*Iterates through all enumerable properties of an object (or elements of an array).

===[[While loop]]===

while (conditioncond-expr) {

statements;

}

===[[do while loop|Do ... while]]===

do {

statements;

} while (conditioncond-expr);

==Functions==