12632 2007-02-06 09:30:15 -0800 XPath: Cannot apply predicate to context node. 2022-07-25 17:48:53 -0700 1 1 1 Unclassified WebKit XML 420+ Mac OS X 10.4 RESOLVED INVALID P2 Normal --- 1 ldanielburr webkit-unassigned ahmad.saleem792 ap bfulgham dialtone rniwa oldest_to_newest 26686 0 ldanielburr 2007-02-06 09:30:15 -0800 The following expression, which works correctly in Opera and Firefox, throws "INVALID_EXPRESSION_ERR: DOM XPath Exception 51": .[@*[] This is just a simple example, but basically any attempt to apply a predicate to the context node fails with this error. As noted above, Firefox and Opera both return the context node if the predicate evaluates as true. 26656 1 12973 ldanielburr 2007-02-06 09:41:02 -0800 Created attachment 12973 Small example for reproducing this bug. 26657 2 ldanielburr 2007-02-06 09:45:49 -0800 (In reply to comment #0) > The following expression, which works correctly in Opera and Firefox, throws > "INVALID_EXPRESSION_ERR: DOM XPath Exception 51": > > .[@*[] > Argh, somehow that didn't paste correctly. It should be ".[@name='test']". Note that the attached sample is correct, and will reproduce the problem accurately. > This is just a simple example, but basically any attempt to apply a predicate > to the context node fails with this error. As noted above, Firefox and Opera > both return the context node if the predicate evaluates as true. > 26638 3 ap 2007-02-06 10:19:04 -0800 A workaround is to use full XPath syntax: "self::*[@class='test']". 26542 4 ap 2007-02-06 10:33:53 -0800 Better yet, "self::node()[@class='test']" 26548 5 ap 2007-02-06 10:51:53 -0800 I think WebKit is correct here, this syntax is invalid in XPath 1.0. See rule 4 - an abbreviated step cannot have predicates. [4] Step ::= AxisSpecifier NodeTest Predicate* | AbbreviatedStep Also, see rule 20 - since "." is not a PrimaryExpr, it cannot start a FilterExpr either. [20] FilterExpr ::= PrimaryExpr | FilterExpr Predicate From rule 20 comes another workaround: "(.)[@class='test']". 26550 6 ap 2007-02-06 11:17:42 -0800 https://bugzilla.mozilla.org/show_bug.cgi?id=369522 71032 7 ap 2008-02-18 02:56:39 -0800 *** Bug 17410 has been marked as a duplicate of this bug. *** 1886617 8 ahmad.saleem792 2022-07-25 16:45:19 -0700 I am getting following behavior across all browsers: *** Safari 15.6 on macOS 12.5 *** Console errors when clicking link in attached test case - The string did not match the expected pattern. *** Chrome Canary 106 **** Console errors when clicking link in attached test case - The string '.[@class='test']' is not a valid XPath expression. *** Firefox Nightly 104 *** Nothing happens and there is no Console error. _______ Comment 05 mentions that Webkit is right here, plus Firefox still has the bug open (Comment 06 was duplicate for https://bugzilla.mozilla.org/show_bug.cgi?id=164822). I think this can be considered as "RESOLVED INVALID" or "RESOLVED WONTFIX"? Thanks! 12973 2007-02-06 09:41:02 -0800 2007-02-06 09:41:02 -0800 Small example for reproducing this bug. webkit-xpath.html text/html 902 ldanielburr PCFET0NUWVBFIGh0bWwKICBQVUJMSUMgIi0vL1czQy8vRFREIFhIVE1MIDEuMCBTdHJpY3QvL0VO IgogICJodHRwOi8vd3d3LnczLm9yZy9UUi94aHRtbDEvRFREL3hodG1sMS1zdHJpY3QuZHRkIj4K PGh0bWwgbGFuZz0iZW4iIHhtbDpsYW5nPSJlbiIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzE5 OTkveGh0bWwiPgo8aGVhZD4KICAgIDxzY3JpcHQgdHlwZT0idGV4dC9qYXZhc2NyaXB0Ij4KICAg ICAgICBmdW5jdGlvbiBmaW5kSXQoKXsKICAgICAgICAgICAgdmFyIHJvb3QgPSBkb2N1bWVudC5n ZXRFbGVtZW50QnlJZCgiZm9vIik7CiAgICAgICAgICAgIHZhciB4cGF0aCA9ICIuW0BjbGFzcz0n dGVzdCddIjsKICAgICAgICAgICAgdmFyIG5vZGUgPSBkb2N1bWVudC5ldmFsdWF0ZSgKICAgICAg ICAgICAgICAgIHhwYXRoLAogICAgICAgICAgICAgICAgcm9vdCwKICAgICAgICAgICAgICAgIG51 bGwsCiAgICAgICAgICAgICAgICBYUGF0aFJlc3VsdC5GSVJTVF9PUkRFUkVEX05PREVfVFlQRSwK ICAgICAgICAgICAgICAgIG51bGwKICAgICAgICAgICAgKS5zaW5nbGVOb2RlVmFsdWU7CiAgICAg ICAgICAgIGlmKCFub2RlKXsKICAgICAgICAgICAgICAgIHRocm93IG5ldyBFcnJvcigiTm8gc3Vj aCBub2RlLiIpOwogICAgICAgICAgICB9CiAgICAgICAgICAgIHJldHVybiBub2RlOwogICAgICAg IH0KICAgIDwvc2NyaXB0Pgo8L2hlYWQ+Cjxib2R5PgogICAgPGRpdiBpZD0iZm9vIiBjbGFzcz0i dGVzdCI+SSBhbSBhIGRpdiB3aXRoIHRoZSBhdHRyaWJ1dGUgPGVtPmNsYXNzPSJ0ZXN0IjwvZW0+ LjwvZGl2PgogICAgPGEgaHJlZj0iIyIgb25jbGljaz0iZmluZEl0KCk7cmV0dXJuIGZhbHNlOyI+ VHJ5IHVzaW5nIFhQYXRoIHRvIGZpbmQgbWUuPC9hPgo8L2JvZHk+CjwvaHRtbD4=