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Readium shared issue #386, added helper function for node.parentElement #387
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…ntElement because of IE
danielweck
reviewed
May 21, 2017
| * @private | ||
| * Helper function because of #386, node.parentElement returns null for text nodes on IE | ||
| * | ||
| * @returns { node } parentElement |
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Just a note, rangy-core's implementation is:
function parentElement(node) {
var parent = node.parentNode;
return (parent.nodeType == 1) ? parent : null;
}
danielweck
reviewed
May 21, 2017
| * | ||
| * @returns { node } parentElement | ||
| */ | ||
| function getParentElement(node) { |
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Note to self: node.parentElement !== textRange.parentElement() (the latter is a function).
danielweck
reviewed
May 21, 2017
| var node = $node[0]; | ||
| var isTextNode = (node.nodeType === Node.TEXT_NODE); | ||
| var element = isTextNode ? node.parentElement : node; | ||
| var element = isTextNode ? getParentElement(node) : node; |
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There are other uses of node.parentElement, notably plugins/highlights/manager.js getAnnotationMidpoints()
https://github.com/readium/readium-shared-js/blob/develop/plugins/highlights/manager.js#L304
I also note the use of jQuery's $node.parent() in many places in ReadiumJS, notably:
//figure out a better way to get the html parent from an element..
var $html = $element.parent();https://github.com/readium/readium-shared-js/blob/develop/plugins/highlights/manager.js#L322
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Because IE returns null for text nodes
Related issue
#386
Additional information
Added function getParentElement which return node.parentElement if it is defined (chrome/firefox/safari/etc) or searches for the closest element in internet explorer 10 & 11