3 ms·
One of the main points of the blog is that Scala.js integrates well with the JavaScript apis and those apis are full of null. A typical loop in the DOM looks li
by oever 10y ago
One of the main points of the blog is that Scala.js integrates well with the JavaScript apis and those apis are full of null. A typical loop in the DOM looks like this:
var node = element.firstChild;
while (node) {
// do something
node = node.nextSibling;
}
Perhaps those interfaces use the Option class?
- oever 10y agoI wrote a small test function. It appears that Scala.js has no default protections against null values from the browser DOM. def printNodes(targetNode: dom.Node): Unit = { var c = targetNode.firstChild while (c != null) { if (c.nodeValue != null) { println(c.nodeValue) } c = c.nextSibling } } The return value from firstChild and nextSibling can be null.