While loop with node and parentNode not reaching end

Question

I'm trying to do a simple loop and check if nodes/parentNode class name matches a string in a array. Code is as follows:

function isInside(list,node) {
    while( node !== undefined ) {
        for( var i = 0; i < list.length; i++ )
            if( node.className.indexOf(list[i]) > -1 )
                return true;
        node = node.parentNode;
    }
    alert(1); // The code does not reach this when false
    return false;
}

Any ideas what is wrong here?

Change `node !== undefined` to `node !== null` since `null` will be the result of there being no `.parentNode`. You could also use `!= null`, which will test for both `undefined` and `null`, but it shouldn't be necessary. — the system, Feb 25 '13 at 23:12
Changing 'node !== undefined' to 'node != null' did not work.. Any other ideas? — user1163278, Feb 25 '13 at 23:18

score 3 · Accepted Answer · answered Feb 25 '13 at 23:08

3

Follow this pattern:

var current = node;
while (current.parentNode){
 // do stuff with node
 current = current.parentNode

}

answered Feb 25 '13 at 23:08

Mohsen

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While loop with node and parentNode not reaching end

1 Answers1