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Use ChildNode.remove instead of ChildNode.ParentNode.removeChild in a couple of places (bug 1334831, issue 8008)

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Re: [bug 1334831](https://bugzilla.mozilla.org/show_bug.cgi?id=1334831) and issue 8008.

Note that according to the specification, see https://dom.spec.whatwg.org/#interface-childnode, the `remove` method shouldn't throw.
This is also consistent with e.g. the Firefox implementation, see http://searchfox.org/mozilla-central/rev/d3307f19d5dac31d7d36fc206b00b686de82eee4/dom/base/nsINode.cpp#1852.

Obviously this isn't supported in IE (because that would be too easy), however we can easily polyfill it to avoid having to WONTFIX the bug/issue.
This commit is contained in:
Jonas Jenwald 2017-02-10 14:19:26 +01:00
parent ba81b37b43
commit 63f13773e7
3 changed files with 19 additions and 10 deletions
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11
src/display/font_loader.js
View File

@ -59,13 +59,10 @@ FontLoader.prototype = {
},
clear: function fontLoaderClear() {
var styleElement = this.styleElement;
if (styleElement) {
if (styleElement.parentNode) {
// Prevent "TypeError: styleElement.parentNode is null" during testing.
styleElement.parentNode.removeChild(styleElement);
}
styleElement = this.styleElement = null;
if (this.styleElement) {
// Note: ChildNode.remove doesn't throw if the parentNode is undefined.
this.styleElement.remove();
this.styleElement = null;
}
if (typeof PDFJSDev === 'undefined' || !PDFJSDev.test('MOZCENTRAL')) {
this.nativeFontFaces.forEach(function(nativeFontFace) {

13
web/compatibility.js
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@ -646,4 +646,17 @@ if (typeof PDFJS === 'undefined') {
});
})();
// Provides support for ChildNode.remove in legacy browsers.
// Support: IE.
(function checkChildNodeRemove() {
if (typeof Element.prototype.remove !== 'undefined') {
return;
}
Element.prototype.remove = function () {
if (this.parentNode) {
this.parentNode.removeChild(this);
}
};
})();
}).call((typeof window === 'undefined') ? this : window);

5
web/grab_to_pan.js
View File

@ -184,9 +184,8 @@
this.element.removeEventListener('scroll', this._endPan, true);
this.document.removeEventListener('mousemove', this._onmousemove, true);
this.document.removeEventListener('mouseup', this._endPan, true);
if (this.overlay.parentNode) {
this.overlay.parentNode.removeChild(this.overlay);
}
// Note: ChildNode.remove doesn't throw if the parentNode is undefined.
this.overlay.remove();
}
};