FunctionsFunctions are series of statements that can be called and return a value. The function keyword (as in function () { }) and arrow (=>) expression create functions. The JavaScript functions protocol includes default and rest parameters and binding to this.javascriptJavaScriptwidely2015-07-292018-01-29https://tc39.es/ecma262/multipage/ecmascript-language-functions-and-classes.html#sec-ecmascript-language-functions-and-classeshttps://tc39.es/ecma262/multipage/fundamental-objects.html#sec-function-objectshttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Functionsjavascript.builtins.Functionjavascript.builtins.Function.@@hasInstancejavascript.builtins.Function.Functionjavascript.builtins.Function.applyjavascript.builtins.Function.apply.generic_arrays_as_argumentsjavascript.builtins.Function.bindjavascript.builtins.Function.calljavascript.builtins.Function.lengthjavascript.builtins.Function.length.configurable_truejavascript.builtins.Function.namejavascript.builtins.Function.name.configurable_truejavascript.builtins.Function.name.inferred_namesjavascript.builtins.Function.toStringjavascript.builtins.Function.toString.toString_revisionjavascript.functionsjavascript.functions.argumentsjavascript.functions.arguments.@@iteratorjavascript.functions.arguments.lengthjavascript.functions.arrow_functionsjavascript.functions.arrow_functions.trailing_commajavascript.functions.block_level_functionsjavascript.functions.default_parametersjavascript.functions.default_parameters.destructured_parameter_with_default_value_assignmentjavascript.functions.default_parameters.parameters_without_defaults_after_default_parametersjavascript.functions.getjavascript.functions.get.computed_property_namesjavascript.functions.method_definitionsjavascript.functions.method_definitions.async_methodsjavascript.functions.method_definitions.generator_methods_not_constructablejavascript.functions.rest_parametersjavascript.functions.rest_parameters.destructuringjavascript.functions.setjavascript.functions.set.computed_property_namesjavascript.grammar.trailing_commas.trailing_commas_in_functionsjavascript.operators.functionjavascript.operators.function.trailing_commajavascript.statements.functionjavascript.statements.function.trailing_comma_in_parametershttps://nowyoucanuse.com/features--functions.html