The following tables compare ECMAScript (particularly JavaScript) support for several popular layout engines. Please see the individual products' articles for further information. Unless otherwise specified in footnotes, comparisons are based on the stable versions without any add-ons, extensions or external programs.== Explanation of the tables ===== Engine nomenclature ===Rather than the names of web browsers, the names of the underlying engines are used.
| Attributes | Values |
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| rdfs:comment |
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| is rdfs:seeAlso of |