Strict mode of JavaScript is on by default in PTC Arbortext Layout Developer, however it is sometimes desired to run JavaScript in not strict mode (such as with the MathJax library) so a new command line parameter has been added. —nostrictjs tells Layout Developer to run JavaScript not in strict mode. This must happen when the JavaScript engine initialises, and so cannot be changed while Layout Developer is running. Please be careful to ensure that if your template makes use of this, all instances of Layout Developer which use the template have this option set too. It is advisable to guard template code which uses this option by testing the application.noStrictJS property.