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Is there any possibility to create a constant for "this" in Lightning helper? I have tried the following syntaxis:
self : this,
initializeInputs : function(component, webLeadData) {}
But I receive the following error message:
Error:(1, 1) c.ddcm_quote: org.auraframework.util.json.JsonStreamReader$JsonStreamParseException: Invalid literal value [6, 12]: 'this'
The reason you cannot do that is because that this will directly point to window. This is not allowed in lightning because of locker service.
Further Explanation:
helper or controller in lightning component are actually a part of closure function which would render like below in client machine:
(function () {
const { $A } = window;
return {
"meta": {
"name": "c$MyAuraComponent",
"extends": "markup://aura:component"
},
"controller": {
"doInit": function (component, event, helper) {
}
},
"helper": {
"helperMethod": function () {
},
"helperMethod2": function () {
}
}
};
}())
So here when you add variable pointing to this in helper, it will directly refer to window. Hence it will not even compile.
Note: However, when you define this inside helper function, its not a problem as function is scoped and lightning framework will take care of referring to helper functions.
